SM-5417 - Ansaldo STS
Contents
1. Table of Contents AnsaldoSTS AnsaldoSTS WIZ vi SM 5417 Rev 1 October 2009 5 gt 27 AnsaldoSIS General Information 1 GENERAL INFORMATION 1 1 Introduction These instructions cover the installation adjustment and maintenance of the Style T 20 Switch Machine Switch Stand Figure 1 1 and Figure 1 2 They also apply to the Style T 21 Switch Machine Switch Stand Figure 1 3 Figure 1 1 T 20 Switch Stand Figure 1 3 T 21 Switch Stand SM 5417 Rev 1 October 2009 N General Information 77 AnsaldoSTS The Style T 20 has no target features A similar switch machine with a target staff and the necessary driving device 1 designated as the Style T 21 The Style T 20 may be converted into a style T 2 by machining an opening in the base casting for receiving the target staff bearing drilling for three mounting bolts replacing the T 20 rack with a T 21 rack and by adding the target staff assembly However if a target may be added in the future it 15 recommended that a T 2 1 Switch Stand be ordered without the target staff and bearing The opening for the target staff bearing 1s then closed with a blanking plate 1 2 General Description The Style T 20 Switch Stand 1 of the rack and escapement crank type and 1s equipped with a circuit controller arranged for the application of a point detector device This switch stand provides a lock bar which with the switch the normal position enter2. FOR REFERENCE ONLY EL Yo N N R MACHINE WITH HEAVY DUTY CIRCUIT CONTROLLER BRA ME 4 1 8 12 3 8 79 0 5 8 22 9 16 21 7 16 ay Zh OF TIE SEE NOTE Y TOP OF TIE T P OF TIE LOW TARGET STAFF LOW TARGET STAFF HIGH TARGET STAFF OR ZN FOR R H LAYOUT R H POINT CLOSED OR 3 1 4 FOR L H LAYOUT R H POINT CLOSED 12 3 16 FOR L H LAYOUT L H POINT CLOSED OR FOR R H LAYOUT L H POINT CLOSED LOW TARGET STAFF Figure 5 1 Switch Stand Assembly Parts Location 5 7 5 8 NN 77 AnsaldoSTS Parts list 5 2 Circuit Controllers Refer to Table 5 3 and Table 5 4 for the Circuit Controller part numbers and Figure 5 2 for the part locations Table 5 3 T 20 and T 21 Circuit Controller Main Part Numbers CONTROL REV PT N103551 NO 10 11 12 13 14 15 15a 16 16a 17 N106778 2Open2Clsed N213496 2 Open 2 Closed 213496001 2 2 Closed With _ D Table 5 4 Circuit Controller Component Part numbers PART DESCRIPTION NUMBER SM 5417 Rev 1 October 2009 5 9 Parts list A 74 AnsaldoSTS ITEM NO 17a 18 18a 19 19a 20 20a 20b 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 360 37 38 39 40 41 42 43 44 45 46 47 48 DESCRIPTION Cotter 1 8 x 1 1 4 Shaft Cotter 1 8 x 7 8 Shaft Cotter 3 32 x 7 8 Screw Washer 3
3. Figure 2 4 d is engaged by the lock bar dog K thus lifting latch bracket B until latch D engages screw G on contact arm A Further movement of the lock bar from this position in which lock bar has already entered the notch the lock rod restores the circuit controller to the Normal position as shown in Figure 2 4 a If the point detector bar is displaced while the lock bar remains the lock rod as would occur 1f the switch 1 improperly trailed the large diameter of point detector bar will engage roller D1 on latch D and thus trip the latch out of engagement with screw G Figure 2 4 e and contacts F will be closed by joint action of springs S and T Figure 2 4 f and will remain closed even if the point detector bar subsequently returns to its normal position The controller will be reset by hand operating the switch to Reverse position and back again to Normal position provided that the lock rod and point detector bar are in proper alignment because latch D will be moved under screw G by pressure of spring E as the lock bar passes through the position illustrated in Figure 2 4 2 3 Circuits The circuits controlled may vary in accordance with different railroad standards however typical circuits illustrating methods of controlling signals are shown in Figure 2 5 and Figure 2 6 SM 5417 Rev 1 October 2009 2 7 A e peration AnsaldoSTS 2T E il REVERSE CONTACTS OPERAT
4. e Installation and Adjustments AnsaldoSTS 3 2 Adjustments 3 2 1 Lock Rod and Point Detector a The lock rod and point detector connections should be adjusted so that the lock bar plunger will enter the lock rod notch and the circuit controller will indicate only when the switch point is within a certain distance of the stock rail as specified by the A A R Signal Section or Railroad instructions b To prevent unnecessary interference with signal indications by operation of the point detector latch during passage of traffic it is suggested that the lock rod connection be adjusted to foul at less point opening than that at which the point detector 1s set c Adjust the point detector connections first before clamping the lock rod nuts so that the lock rod notch can be aligned to permit the plunger lock bar to reach its Normal position and operate the circuit controller Switch stands having standard circuit controller without reverse point detector feature are fitted with a solid point detector bar which 1s adjusted by the nuts clamping the eye end of the point detector connecting rod Switch stands equipped with reverse point detector feature are fitted with sleeve type point detector bar per Figure 3 4 which requires adjustment in two places and in a certain sequence First adjust the nuts X to check closure of far switch point Then adjust the sleeve to check closure of near switch point NOTE After all adjustments have be
5. Assembly V are open about 1 16 when the contacts are free of all restraint Adjust by use of a spring bending tool applied to the long contact finger SI near the terminal board With the switch stand fully assembled and normal position back off the conical headed screw K2 Figure 2 3 until it is clear of the point detector lever knob FI 1 Adjust the nuts D2 Figure 2 1 to obtain a 3 32 to 1 8 gap between fully open contacts b 2165 to 3 165 pressure between fully closed contacts and c 1 32 to 1 8 clearance between the rocker arm K and the top of the lock bar P when the mechanism 15 the normal position If the contact gaps and pressures just specified cannot be obtained by adjustment of the nuts D2 within the range permitted by rocker arm clearance limits then correct the gaps or pressures of individual contacts by bending the shorter contact fingers 52 Use a spring bending tool applied close to the terminal board 2 After this has been done remove the contact operating insulations D and if necessary bend the longer contact fingers 51 so that the contacts which stand open with the complete mechanism in its normal position are closed with approximately 1 2 Ib pressure and the contacts which stand closed with the complete mechanism its normal position are open approximately 1 16 SM 5417 Rev 1 October 2009 4 1 I Maintenance AnsaldoSTS 3 Ifit has been necessary to bend the springs as described i
6. 1 October 2009 2 3 N Operation 77 AnsaldoSTS fi al i d N Jj sl il 1 i T EE T um 7 p Li Nian amp MAX MECHANISM AND LOCK BAR IM NORMAL POSITION ANG POINT DETECTOR ROLLER LARGE DIAMETER POINT DETECTOR BAR V PARTS IN NORMAL POSITION 8 PARTS IN REVERSE POSITION C RETURNING FROM REVERSE TO NORMAL SHOWING HOW LATCH SCREW 15 CLEARED FROM FINGER F2 D ABNORMAL CONDITION AFTER BEING TRAILED WITH POINTS LOCKED LATCH DETAILS AS FURNISHED PRIOR TO 1950 ADJUSTMENT OF LATCH SCREW Ji WITH RESPECT TO LATCH FINGER F2 Figure 2 3 Sectional Views of Standard Circuit Controller 2 4 SM 5417 Rev 1 October 2009 5 77 AnsaldoSTS Operation The point detector latch consists of a pivoted arm J which carries the adjustable latch screw Jl The face of the latch screw normally rests against the end of the latching finger F2 on the point detector lever When the switch is improperly run through while the normal position the contacts are operated by motion of the point detector bar while the lock bar is still in the lock rod notch The end F2 of the finger 15 depressed and the face of latch screw takes a position above the end of the finger since the latch arm 1 urged clockwise by its weight and the spring J2 Thus the circuit controller as shown View D of
7. Screw 14 24 x J051340 B C D 1 2 65 Washer 17 64 x J047818 B C D 9 16 Washer 8 J047714 Used with optional heater 67 Screw 8 32 x J052530 Used with optional 3 8 19 heater Bracket Switch M451161 4701 Used with optional Mounting heater Switch J724515 Used with optional heater 70 Nameplate M451607 7101 Used with optional heater 5 4 SM 5417 Rev 1 October 2009 N 77 AnsaldoSTS Parts list ITEM NO DESCRIPTION PART NUMBER Washer 1 2 stl J047503 pl Filler Block M107206 Nut 3 8 Hex Stl J048009 Plate Bolt 3 8 x 8 Sg J046653 Sil Washer 3 8 Stl J047502 Plate Wire 12 A045017 0000 Used with optional heater Terminal 4730044 Used with optional heater gt gt Target Staff N383607 Optional High Target Staff N383605 Optional Low Traget Staff N438380 Optional Low Target Staff N438381 Optional Low Target Staff N49113801 Optional Low L H Point Closed Target Staff N49113802 Optional Low R H Point Closed 78 Standard basic T 20 mechanism without circuit controller point detector bar and point detector bar cover With rack driven lock bar and movement box Right hand layout N395795 Main view as shown Right hand in Figure 5 1 switch point closed Right hand layout N395796 View X as shown in Left hand switch Figure 5 1 point closed Left hand layout 395797 View as shown Left hand switch Figure 5 1 point closed Left hand lay
8. mm mm mm EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE T me ee EE EE EE EE EE T me mee ee ee POINT DETECTOR CONNECTING ROD Figure 1 9 Right Hand Layout for the Style T 20 or T 21 Switch Stand 1 6 SM 5417 Rev 1 October 2009 7 AnsaldoSTS General Information VIEWED FROM TRACK SIDE OF RH LAYOUT K P1 STRIKES ABOUT TO OPERATE CIRCUIT CONTROLLER REVERSED Figure 1 10 Operating Characteristics SM 5417 Rev 1 October 2009 1 7 NY General Information AnsaldoSTS AnsaldoSTS WIZ 1 8 SM 5417 Rev 1 October 2009 5 77 AnsaldoSTS Operation 2 OPERATION 2 1 Switch Operating Mechanism The switch operating mechanism as shown Figure 2 1 consists of a heavy segmental gear mounted on a square shaft M2 which is directly connected to the hand throw lever M and is mounted in journals in the housing A When hand throw lever is operated the gear imparts a longitudinal motion to the rack R On the underside of the rack Figure 2 2 are three heat treated rollers Rl R2 and R3 Rollers R2 and R3 are on the centerline of the movement and serve to guide the rack in its longitudinal motion Roller 1 which 15 off the centerline and midway between rollers R2 and works in conjunction with the escapement crank E to produce rotation of the switch operating crank G The nominal stroke of the rack seven inches im
9. 16 PI Washer Lk Spring Pt Det Lever Spring Latch Spring Ph Br Nut 3 8 24 Nut 5 16 18 Nut 3 8 Elastic Stop Washer 5 16 Lk Washer 3 8 Lk Screw 12 28 x 1 1 8 Fil Screw 10 30 x 1 2 Fil Washer 10 Lk Bracket Term Bd Mtg Stud Pt Det Nut 1 2 20 Hex Jam Screw Washer 3 16 PI Washer Lk Lever Rev Pt Det Contact Support Board Contact Spring Contact Spring Contact Spring Contact Fixed Spacer Contact Bushing Ins Terminal Post Terminal Post Terminal Post PART NUMBER J048622 M105336 J048619 M105105 J048612 M249659 J047500 J047669 M103348 M103557 J068792 J048063 J048006 J048111 4047767 4047768 451358 2518 451358 0108 4047733 210927 M105096 J048181 M105288 J047500 J047669 M210926 M105095 4077026 072592 072590 105102 105098 105094 4077634 125782 125781 105175 A B C D A B A B C D C D A B A B A B A B C D A B C D A B C D A B C D A B C D A B C D A B C D A B C D A B C D C D A B C D A B C D A B C D C D C D C D A B C D A B C D A B C D C D SM 5417 Rev 1 October 2009 N 77 AnsaldoSTS Parts list ITEM PART DESCRIPTION NO NUMBER 49 Terminal Post N130200 50 Terminal Connector 4 Way Terminal Connector 2 Way SM 5417 Rev 1 October 2009 5 11 Parts list 77 AnsaldoSTS 5 12 22 13 14 16 15 4 2 Figure 5 2 C
10. 2 3 d insert the lock bar P so that stud P2 engages the rack and replace the lock bar guide plate P4 Reassemble the hand throw lever M and gear N on the opposite side of the stand being certain that the lug NI on gear N projects away from the lock bar for Figure 1 7 assemblies and over the lock bar for Figure 1 8 assemblies Proper engagement of the gear with rack R 1 obtained by placing the X marks on the gear and rack alignment SM 5417 Rev 1 October 2009 3 1 SN Installation and Adjustments AnsaldoSTS H LAYOUT POINT NORMALLY CLOSED a R H LAYOUT L H POINT NORMALLY CLOSED L H LAYOUT R H POINT NORMALLY CLOSED L H LAYOUT L H POINT NORMALLY CLOSED Figure 3 1 Switch Layout Diagrams With the point detector bar removed change the location of the point detector roller also the reverse point detector stud T if used to the opposite side of its lever see also Figure 3 2 and interchange point detector bar bushings and V2 The relative positions of all parts should now agree with those shown in Figure 3 1 d The general arrangement of the operating mechanism for the various layouts is shown by Figure 3 1 and a procedure similar to that just described 1 followed converting the mechanism from one arrangement to another The T 21 mechanism may be rearranged for right or left hand application in the same manner as the T 20 mechanism w
11. Figure 2 3 is prevented from returning to normal until released manually by throwing the hand throw lever to reverse or by lifting the latch arm J In 1950 latch screw was changed to have a sloped surface the end of latch finger F2 was rounded and the contact operating bracket springs were stiffened These changes reduce the possibility of undesired operation of the latch resulting from momentum overtravel of the parts when excess traffic vibration causes the point detector bar to hammer blow on the roller The latch finger working on the sloped face of the latch screw kicks the latch screw away from the latch finger momentarily thus allowing the latch finger to return again to its normal position without interference from the latch screw NOTE When the T 20 mechanism 15 used at a SPRING SWITCH no lock rod the latch must be rendered ineffective by removing latch arm J The reverse point detector feature when used provides indication for reverse position of the switch points through four pairs of contacts 53 54 Figure 2 1 operated by the point detector bar V The bracket lever L which shifts these contacts 1s pivoted at LI and 15 rotated clockwise by engagement of stud T with the large diameter of the point detector bar to hold the reverse point detector contacts up except when the switch 1s in the reverse position 2 2 2 Heavy Duty Type for reference only The operation of the heavy duty circuit controller is illustrat
12. SM 5417 Rev 1 October 2009 AnsaldoSTS RAIL Team and Technical Support 6 RAIL TEAM AND TECHNICAL SUPPORT The Rapid Action Information Link Team RAIL Team 15 a group of experienced product and application engineers ready to assist you to resolve any technical issues concerning this product Contact the RAIL Team in the United States at 1 800 652 7276 or by e mail at railteam ansaldo sts us SM 5417 Rev 1 October 2009 6 1 NY RAIL Team and Technical Support AnsaldoSTS AnsaldoSTS End of Manual A 6 2 SM 5417 Rev 1 October 2009
13. assembly per Figure 1 8 in which the lock bar PL 1s operated independently of rack R For this arrangement the pinion gear 1s reversed from its position in Figure 1 7 so that lug engages with dog P3 riveted on top of lock bar PL to prevent operation of the stand until the bar has been moved to unlock the switch points The lock bar PL in Figure 1 8 1s longer than that used Figure 1 7 to enforce longer unlocking stroke Figure 1 10 The direct drive and independent drive arrangements of lock bar described in the preceding paragraphs for mechanisms with the standard circuit controller are available also when the heavy duty controller is used The bars used with the heavy duty controller however are not the same bars as those used with the standard circuit controller Where it is desirable that the unlock of the switch be controlled by an operator in a nearby tower or by track circuits an electric switch lock such as the ASTS USA SL 21A can be used in place of the standard lever latch stand SM 5417 Rev 1 October 2009 1 5 NY General Information 7 AnsaldoSTS SWITCH ADJUSTER SL 21 SWITCH ELECTRIC ETA ZINO T 20 SWITCH SWITCH ROD MACHINE LOCK LEVER LATCH STAND f E S i NM ee a m au rod E E ridi HINGED p LUG ROD POINT DETECTOR LOCK ROD POINT CONNECTING CONNECTING ROD ROD JUNCTION BOX
14. can be applied to left hand layouts and vice versa by rearranging the assembly of parts The switch stand can always be reassembled to suit the various layouts but in some instances the switch operating rods and lock rod connections due to having both horizontal set and vertical set are different for right hand and left hand application A switch stand assembled for a right hand layout with the right hand switch point normally closed Figure 3 1 a may be reassembled to suit a left hand layout with left hand switch point normally closed Figure 3 1 d by following the procedure outlined below Refer to Figure 2 1 Operate the stand to the reverse position and then remove the hand throw lever M and shaft M2 and the segmental gear N Next remove the lock bar guide plate P4 lift the lock bar P to disengage stud P2 from rack R and withdraw the lock bar to permit the removal of the rack With the rack removed raise the escapement crank E and its shaft free of the operating crank G and rotate the escapement crank through 180 degrees Then lower the escapement crank assembly so that the square portion of the shaft engages the operating crank the relationship of the crank parts then being as shown in Figure 3 1 d Replace rack R turned end for end with respect to its original position making certain that roller engages properly with the operating face of the escapement crank With rocker arm K raised and latched to be clear of dog PI Figure
15. grease fitting Figure 5 3 Item 30 in latch bracket Figure 5 3 Item 4 should be Texaco Novatex EP 1 or Alemite No 32 4 4 SM 5417 Rev 1 October 2009 77 AnsaldoSTS Maintenance The knives of contacts Figure 5 3 Item 11 should be coated with a light film of Petrolatum Grease Ald i E L T EE as i S s E NOTE NUMBERS INDICATE LUBRICATING FITTINGS T 20 AND T 2l MECHANISMS sa o mens Om LOJ iim 6 2059 LI LL LE Ij 9 j G Fe GREASE AAAS AA ET US AAA 4 z Je 4 w d Wey Al x a Z La m TA 1 LD SECTION Y Y 5 Figure 4 2 Lubrication Diagram SM 5417 Rev 1 October 2009 4 5 lt Maintenance 77 AnsaldoSTS q 7 AnsaldoSTS 4 6 SM 5417 Rev 1 October 2009 N 77 AnsaldoSTS Parts list 5 PARTS LIST 5 1 20 amp T 21 SWITCH STANDS Refer to Table 5 1 and Table 5 2 for the T 20 and T 21 Switch Stands part numbers and Figure 5 1 for the part locations Table 5 1 T 20 and T 21 Switch Stand Main Part Numbers CONTROL SWITCH SW PT L L L ss Jao RM poe EE Table 5 2 T 20 and T 21 Switch Stand Componen
16. mechanisms is assembled with lug NI over the lock bar PL to lock the hand throw lever by means of dog when the lock bar is operated to 15 locked up position Independent lock bar PL differs from stud driven lock bar P not only in the absence of drive stud P2 and in the addition of hand throw locking dog P3 but also in the shape of dog PI and the length of bar projecting beyond this dog Referring to Figure 1 10 it will be seen that the shorter dog permits 2 variation the locked up position of the remotely operated lock bar between the inmost position a and the position b in which the circuit controller 1s just released or about to be operated b The driving connection must be adjusted to position the lock bar in its locked up position between a and b So that the full 2 stroke between a and b may be available as leeway in this adjustment the stroke delivered by the pipe line connection must be not less than 5 to insure that the bar adjusted at a when locked up will be pulled to or beyond position c when unlocked and must be not more than 6 1 4 to insure that the bar adjusted at b when locked up will not strike at position d when unlocked When the stroke applied to the pipe line connection 15 not between 5 and 6 1 4 the stroke of the T 20 bar per X in Figure 1 5 and Figure 1 7 1s 7 select ratios for the pipeline cranks which will deliver the 5 to 6 1 4 desired stroke When the pipe line 1s not compens
17. the mechanism latched and the point detector bar back 1n its original position with the groove under 4 2 SM 5417 Rev 1 October 2009 5 4 AnsaldoSTS Maintenance the roller normally open contacts should be latched closed and have a contact pressure of at least 1 Ib and normally closed contacts should be latched open and have gap of at least 1 16 Latch screw J1 should be locked with the working face of the screw parallel to the corresponding face on the latch finger F2 of the point detector lever F 4 2 2 Reverse Point Detector when used See Figure 2 1 Adjust screw stud so that 5 32 to 7 32 motion of the point detector bar measured from the position in which the rise from small diameter to large diameter of the bar is just touching the head of the stud will open or close the contacts depending on the contact assembly See Figure 3 3 Full contact opening should be 3 32 to 1 8 and pressure when fully closed should be 2 165 to 2 1 2 165 4 3 Circuit Controller Adjustment Heavy Duty Withdraw the lock bar L so as to place the top surface of dog K beneath roller M Figure 2 4 c by operating the hand throw lever in mechanisms having the lock bar attached to the rack or by operating the remote control for independent drive type lock bars Stop lugs Al on contact arm A should bear against the lugs on the frame Under these conditions spring sockets H should just seat on the bosses of latch bracket B as can be dete
18. 1 1 8 Hex M N ut All except A A C D 5 2 SM 5417 Rev 1 October 2009 2 77 AnsaldoSTS Parts list ITEM NO DESCRIPTION PART NUMBER USEDON 22 Bolt 3 8 16 x 3 J046642 All 1 4 23 Nut 1 2 13 J048013 All Heavy 25 Washer 3 8 Stl 4047768 All Lk Lk 7 1 B C D 32 Grease Fitting J039137 All 1 8 St 33 Terminal Board J776059 A B C D Molded Bracket Contact N251718 A L H Bracket Contact M250835 B C D L H Bracket Contact N251720 A R H Bracket Contact M250836 B C D R H Nut Insulated J048301 A B C D Molded Grease Fitting J039142 1 8 Elbow Screw 5 16 18 4052362 1 5 8 Fil eo Cover Point Det M107486 A B C D E F G H 42 Cover Point Det M107487 34 34 35 35 36 3 38 39 40 4 42 42 43 4 SM 5417 Rev 1 October 2009 5 3 I Paris list 77 AnsaldoSTS ITEM NO DESCRIPTION PART NUMBER USEDON Washer 5 16 J047767 A E F G H I J K L Lock M N Washer 5 16 J047526 B C D Filler M232151 Protector 1 3 16 J703330 Washer 1 2 J047751 A B C D BR Lk BE Nu 5 16 18 J048006 _ 5 16 9047642 B C D a lH Spring Retainer 109442 Il J K L M N Latch Spring M103557 1 J K L M N 61 Terminal Block N451161 4802 Assembly 62 Screw 8 32 x J525107 Used with optional 3 4 lg heater Resistor 800 Q J720074 Used with optional 300 W heater
19. 2 5 2 3 071 a us ME 2 7 24 F 2 1 WI SANU sss KE pde Dose KE e ee eo 2 9 3 INSTALLATION AND ADJUSTMENTOS ssssssssssssssessssnnnsssssssususssssusssnnnnnnnnnnnnnnnnuusssssssttas 3 1 221 TERN 3 1 MOUNINO san a dt nn nf 3 1 9 142 General InsttueclloblSsuesssi epos eio 3 1 3 1 3 Interchangeability R H 8 L H etc 3 1 225 AGJUSIMON 5 E Saa ae 3 4 3 214 LOCK Rod and DeleGlOL eee 3 4 Cl PE 3 6 3 2 3 Switch Stands with Independent Lock Bar 3 6 A MAINTENANCE em 4 1 REB eei Mc cc 4 1 4 2 Circuit Controller Adjustment Standard 4 1 421 Pont Detector uuu yuyu duda a o ka gatos E o ko 4 2 4 2 2 Reverse Point Detector when used ss 4 3 4 3 Circuit Controller Adjustment Heavy Duty 4 3 A MENO cH e OL 4 4 4 4 1 T 20 amp T 21 Switch Stands 4 4 442 Heavy Duty Circult Controller onse et 4 4 PARTS LIST ecc 5 1 T1520 amp T 21 SWITGHASTANIS 5 1 5 2 SPS u Lu u u uu nu E es nt 5 9 5 3 Heavy Duty Circuit Controller fo
20. 5 TE 1000 Technology Drive Pittsburgh PA 15219 7 AnsaldoSTS 55 Russ ilitreet Batosburg SC 2006 SM 5417 1 20 T 21 HAND OPERATED SWITCH MACHINES SwiTCH STANDS Installation Operation Maintenance Copyright 2009 SM 5417 Rev 1 Union Switch amp Signal Inc October 2009 5 4 AnsaldoSTS Notices Proprietary Notice This document and its contents are the property of Ansaldo STS USA Inc formerly known as Union Switch amp Signal Inc and hereinafter referred to as ASTS USA This document is furnished to you on the following conditions 1 That no proprietary or intellectual property right or interest of ASTS USA is given or waived in supplying this document and its contents to you and 2 That this document and its contents are not to be used or treated in any manner inconsistent with the rights of ASTS USA or to its detriment and are not to be copied reproduced disclosed or transferred to others or improperly disposed of without the prior written consent of ASTS USA Important Notice ASTS USA constantly strives to improve our products and keep our customers apprised of changes in technology Following the recommendations contained in the attached service manual will provide our customers with optimum operational reliability The data contained herein purports solely to describe the product and does not create any warranties Within the scope of the attached manual it 15 impossible to ta
21. 5 encircled by a groove which receives one half the diameter of clamping bolt W2 The lower end or finger of crank W is restrained in a groove H of the rack R Longitudinal motion of the rack causes the crank and target shaft to rotate 90 degrees The angular relation between the target staff or lamp tip and the crank may be changed in 9 degree steps by reassembling the crank on the shaft see Section 32 23 SM 5417 Rev 1 October 2009 2 9 Y Operation 77 AnsaldoSTS BOTTOM VIEW VIEW B Figure 2 7 Target Drive 2 10 SM 5417 Rev 1 October 2009 me 7 AnsaldoSTS Installation and Adjustments 3 INSTALLATION AND ADJUSTMENTS 3 1 INSTALLATION 3 1 1 Mounting The T 20 switch stand is designed for mounting directly on top of the ties It is recognized that certain switch fittings shown in the layout plan will vary due to standards of different roads A properly approved layout showing mounting details should be followed when making the installation 3 1 2 General Instructions The switch points their respective closed positions should fit snugly against the stock rails The rail braces should be set snugly against the stock rails Instructions for installing the Style T 20 or T 21 mechanism when equipped with heavy duty circuit controller are in general the same as given for the standard type circuit controller 3 1 3 Interchangeability R H amp L H etc In general material for right hand layouts
22. ED I RC BY POINT DETECTOR ONLY rd I lma OPEN WITH SWITCH NORMAL POSITION I l I Til LI 2HR AITR Tle CONTROL 1AHR 1 S CONTROL Jor mer LINE SIGNAL NORMAL CONTACTS OPERATED BY POINT DETECTOR OR LOCK BAR IN LOCKED POSITION NOTE ENTERING SIDING SIGNAL CIRCUIT 18 SHOWN SHOWN CLOSED WITH SWITCH DOTTED TO BE USED WHEN REQUIRED IN NORMAL POSITION NORMAL CONTACTS OPERATED BY POINT DETECTOR OR LOCK BAR IN LOCKED POSITION SHOWN CLOSED WITH SWITCH IN NORMAL POSITION NORMAL CONTACTS OPERATED BY POINT DETECTOR OR LOCK BAR IN LOCKED POSITION SHOWN OPEN WITH SWITCH IN NORMAL POSITION DO Figure 2 5 Circuits 2 8 SM 5417 Rev 1 October 2009 N 77 AnsaldoSTS Operation Ig s NORMAL CONTACTS OPERATED BY 4 POINT DETECTOR OR LOCK BAR IN LOCKED POSITION SHOWN OPEN WITH SWITCH IN NORMAL POSITION mamam Se saf Figure 2 6 Typical Track Shunting Circuit for reference only 2 4 T 21 Switch Stand The T 20 switch stand when equipped with a built in target drive mechanism is designated as the T 21 Switch Stand The target drive mechanism Figure 2 7 View 15 of simple design and positive in its operation The lower end of the target shaft B terminates in a toothed portion WI to which is clamped the serrated hub of crank W The toothed portion of the shaft 1
23. L REDUCE THE 2 INCH PER MISSABLE VARIATION BY AN AMOUNT EQUAL TO THE INCREASE OR DECREASE IN WITHDRAWAL STROKE Parts list CIR CONTR FRAME dias ac ROCKER ARM L DOG F DOG STOP SCREW J 2 D ED GC ADAN CREE CNET WS ES Le THE SE LOCATIONS BA CORRESPOND TO 21 pots de gt i EID POSITION V da n lt gt RNI e E 222 SWITCH UNLOCKED U V SEE NOTE Z 9 SN 2 la l 79 e J WHEN CALLED FOR NI SEE NOTE D NORMAL CONTACTS VIEW SHOWING PT DET BAR 8 COVER FOR REVERSE 9 POINT DETECTOR _ FOR 3 4 INCH BOLTS SEE NOTE LO DET STUD 55 VIEW A WITH REVERSE PT DET CONTACTS EE RT Seal t 1 NORMAL PT 2 2 DET ROLLER MECH AS SHOWN 59 SEE NOTE FOR R H LAYOUT R H POINT CLOSED TERMINAL BLOCK WIRING DIAGRAM FOR RESISTOR amp SWITCH WHEN CALLED FOR DIAGRAM X SHOWING POSITIONS OF INDEPENDENT LOCK BAR IN MECHANISM Z o EET TN TTA NORMAL STANDARD CIRCUIT CONTROLLER WITH HEAVY DUTY EXTERNAL TERMINALS
24. W X FOR R H LAYOUT L H POINT CLOSED NORMAL PT DET ROLLER REVERSE PT DET VIEW Z pice FOR L H LAYOUT R H POINT CLOSED ROLLER UG0106 0036 00 SM 8525 Rev 1 October 2009 SZ WHEN Z 5 gt CALLED 5 FOR 61 e kr 1 T rrt Wi E a N NORMAL BS 2116 ES LED DET J Ta ROLLER Wama ue g 7 THIS METO E SEE NOTE O S O D SECTION A A 865 75 0 42 80 NOTE Z ENGINEERING DATA ON POSITION OF INDEPENDENT NOTE LOCK BAR PER DIAGRAM X S POSITION OF INNER END OF LOCK BAR AT INMOST NORMAL POSITION WHEN DOG F STOPS AGAINST CIRCUIT CONTROLLER FRAME T POSITION OF INNER END OF LOCK BAR AT OUTMOST NORMAL POSITION WHEN DOG F WILL OPERATE CONTROLLER ROCKER ARM L U POSITION OF INNER END OF LOCK BAR WHEN LOCK ROD IS JUST RELEASED amp WHEN DOG C CLEARS LUG H ON GEAR SO THAT HAND THROW LEVER CAN BE THROWN 180 V POSITION OF INNER END OF LOCK BAR AT FULLY WITHDRAWN POSITION WHEN STOP SCREW J STRIKES COVER PLATE amp DOG F IS ABOUT BE WITHDRAWN FROM UNDER ROCKER ARM L INDEPENDENT LOCK BAR IS DESIGNED FOR A WITHDRAWAL STROKE OF 5 TO 6 1 4 INCHES WHICH WILL PERMIT A 2 INCH VARIATION IN THE ADJUSTED POSITION OF LOCK BAR A STROKE GREATER THAN 5 1 4 INCHES OR LESS THAN 5 INCHES WIL
25. ated for thermal expansion the connection adjustment should be made with due regard to the temperature at the time placing the bar nearer position a hot weather and nearer position b in cold weather When adjusting the point detector and lock rod connections of such a stand it must be remembered that the hand throw lever cannot be operated unless the lock bar 1s 1n the Reverse position and that the point detector operation of the Normal contacts cannot be observed unless the lock bar 15 Normal position 3 6 SM 5417 Rev 1 October 2009 N AnsaldoSTS Maintenance 4 MAINTENANCE 4 1 Mechanism The adjustments covered Section 3 2 should be maintained at all times The controller and latching device upon leaving the factory will have been properly adjusted and should need no further adjustment at the time of installation After installation however the adjustments should be checked at intervals to insure that they are maintained accordance with the information in this section NOTE All adjustments and lubrication should be performed annually or in accordance with railroad maintenance schedules 4 2 Circuit Controller Adjustment Standard When assembled new or if contacts are inverted in the field to interchange open and closed positions the contact spring board assemblies should be adjusted before mounting in the mechanism so that contacts per Assembly W Figure 3 3 are closed and contacts
26. ction 15 a 1 4 diameter rod the hand throw lever being operated full stroke in each case See Note under C Similarly when the obstruction is 1 8 the locking stroke should be completed but when the obstruction 15 3 16 the lock rod should foul the lock bar plunger so as to prevent locking NOTE The point detector latch should operate when the point detector connection 15 moved approximately 1 16 beyond the position at which the Normal indication is interrupted If the contacts should be held by operation of the latch release the latch by lifting arm J Figure 2 3 or by operating the hand throw lever to Reverse position and back again to Normal position SM 5417 Rev 1 October 2009 3 5 5 Installation and Adjustments AnsaldoSTS 3 2 2 Target To align the target on the T 21 switch stand to sutt curves or other layout conditions remove the three mounting bolts which fasten the target bearing plate to the mechanism and lift the target assembly off Remove the crank clamp bolt W2 slip the crank off the toothed end of the shaft replace it at the desired new position and reassemble the bolt The serrations inside of the crank collar will permit rotational adjustment in 9 degree steps 3 2 3 Switch Stands with Independent Lock Bar a such switch stands the lock bar is operated from another switch stand or lever stand by pipeline connection As discussed in Section 1 3 and shown in Figure 1 8 gear N in such
27. d from dust rain and snow and the droppings from passing trains by a single cover which extends over both the switch operating mechanism and the circuit controller and 1s sealed with packing This cover 1s removed and 1s attached to the housing by a screw down hasp at one end and by an adjustable hinge at the other end 1 3 Applications The T 20 switch stand readily accommodates the many variations of switch layouts single switch or crossovers with provisions for independent locking and derail operation Operation of a derail by connection to the projecting end of the lock bar 1s shown in Figure 1 4 Two arrangements for interlocking the switch mechanisms at the ends of a crossover are shown in Figure 1 5 and Figure 1 6 The application in Figure 1 4 shows a single switch using the X assembly as illustrated 1n Figure 1 7 The switch 1s operated and locked for facing point protection and has a provision for operating a pipe connected derail A derail can be connected to the projecting end of lock bar P by a pipe Figure 1 4 Single Switch Application The application in Figure 1 5 shows crossover switches that provide complete facing point protection Operation of the X stand Figure 1 7 unlocks and throws the right hand end of the crossover And through a pipe connection unlocks the points at the other end Operation of the Y stand Figure 1 8 reverses the points at the left hand crossover To restore the crossover point
28. ed in Figure 2 4 Figure 2 4 a b and c show the successive steps during ordinary hand operation Figure 2 4 d illustrates the action when the switch is hand operated back to the Normal position and Figure 2 4 e and Figure 2 4 f show the action of the latching device SM 5417 Rev 1 October 2009 2 5 Y Operation 77 AnsaldoSTS E D P G1 OESIE i F 32 16 a IP N KC M D1 C1 01 C1 A E DG P GI 5 ERO N KL C M IA ET he ae H K C M L E D A1 P S Jc P G1 U REVERSE POSITION OF FIXED LOCK D1 CIN HK L M C C ML F A PARTS IN NORMAL POSITION B POSITION OF PARTS DURING FIRST PART OF LOCK BAR STROKE C POSITION OF PARTS DURING LAST PART OF LOCK BAR STROKE D LOCK BAR RETURNING TO NORMAL POSITION E LATCH TRIPPED BY DISPLACING POINT DETECTOR BAR WITHOUT WITHDRAWING LOCK BAR PARTS SHOWN IN A SUSPENDED POSITION AT INSTANT BEFORE CONTACT ARM MOVES UG0106 0032 00 F FINAL POSITION OF PARTS AFTER LATCH IS TRIPPED Figure 2 4 Sectional Views of Heavy Duty Circuit Controller for reference only Contact arm Figure 2 4 a and latch bracket both pivot on the fixed pin and are urged to rotate in opposite directions by compression springs 5 They are ordinarily restrained from relative motion by latch D which pivots o
29. en completed check that the lock rod will foul the plunger when the switch point 1s obstructed to the degree required in checking the point detector It will be necessary therefore to back off the lock rod nuts in subsequent checking of the point detector To assist in maintaining point detector adjustment during intervals between obstruction tests gages are available to check the adjustment without disturbing point detector and lock rod connections See Service Manual 5453 3 4 SM 5417 Rev 1 October 2009 7 AnsaldoSTS Installation and Adjustments REVERSE POINT POINT DETECTOR A DETECTOR STUD ROLLER a cock wr set di SWITCH IN NORMAL POSITION j j SWITCH IN REVERSE POSITION Figure 3 4 Sleeve Type Point Detector Bar Referring to Figure 1 10 A the minimum distances of the switch point from the stock rail for Which it 1s generally practicable to adjust the point detector and lock rod connections are 3 16 to 1 4 for the point detector and 1 8 to 3 16 for the lock rod When the connections are adjusted to these minimum dimensions the Normal circuit controller contacts should assume their Normal indication positions and the Reverse point detector contacts assume their Reverse indication positions when their respective switch points are closed on a 3 16 diameter rod located against the head of the stock rail 6 from the end of switch point but should not assume these positions when the obstru
30. ical Track Shunting Circuit for reference only 2 9 Jab TL 2 10 owiteh Layout eee DU 3 2 POMIDElGCIOF REIANONSNIDS area eine 3 3 Contact Assemblies ssss sssssssssc sssssssssssssscssesssnunsstssseeessnnnnsstssessennnnss 3 3 Sleeve Type Point Detector Bar ei e o enit la 3 5 Sleeve Type Point Detector Baru y iei oec oer eei 4 2 4 5 Switch Stand Assembly Parts Location 5 7 Circuit Controler ASSOITIDIV ates m T TRrRrFFRER 5 12 Heavy Duty Circuit Controller Assembly for reference only 5 14 SM 5417 Rev 1 October 2009 NY Z AnsaldoSTS Table of Contents List of Tables Table 5 1 20 and T 21 Switch Stand Main Part Numbers 5 1 Table 5 2 T 20 and T 21 Switch Stand Component Part numbers 5 1 Table 5 3 T 20 and T 21 Circuit Controller Part Numbers 5 9 Table 5 4 Circuit Controller Component Part numbers 5 9 Table 5 5 Heavy Duty Circuit Controller Part Numbers SM 5417 Rev 1 October 2009 NY
31. ircuit Controller Assembly SM 5417 Rev 1 October 2009 77 AnsaldoSTS Parts list 5 3 Heavy Duty Circuit Controller for reference only Refer to Table 5 5 for the Heavy Circuit Controller part numbers and Figure 5 3 for the part locations Table 5 5 Heavy Duty Circuit Controller Part Numbers PART DESCRIPTION NUMBER Heavy Duty Circuit Controller complete Frame Complete Contact Arm Latch bracket Complete Bushing P O Item 4 Roller P O Item 4 Roller P O Item 4 Pin P O Item 4 Pin P O Item 4 Latch Contact Pin Pin Eye Bolt Spring Socket Point Detector Roller amp Stud Contact Block Screw Latch Adj Spring Spring Spring Washer Nut 5 8 18 Hex Jam Screw 3 8 16 x 1 3 4 Nut 3 8 16 Hex Washer Lock 3 8 Screw 1 4 20 x 1 1 2 Hex Nut 1 4 20 Hex Washer 1 4 Lock N103854 M103851 M103629 N103628 M207745 M210514 M189298 M189297 M189296 M103913 M160612 M210523 N189427 M210522 M210721 M189423 N103832 M160556 M210245 9068665 9068667 103843 155385 9048083 9050059 9048009 4047768 4050023 9048002 4047766 SM 5417 Rev 1 October 2009 5 14 j Parts list 77 AnsaldoSTS ITEM PART Washer 1 4 Plate 1047501 Nut 3 8 Elastic Stop 1048111 Fitting Grease 1 8 J039137 1 Nut 3 8 16 J048009 Hs d Washer 3 8 Lock J047768 NO 31 32 Figure 5 3 Heavy Duty Circuit Controller Assembly for reference only
32. ith the additional requirement that when the rack has been turned end for end the target drive crank must be turned 54 degrees six serrations to a position 27 degrees three serrations on the opposite side of the centerline of the movement in order to line up with the groove in the rack The hub of the target drive crank and the bottom of the target shaft are marked Figure 2 7 b so as to indicate their relative positions in each instance 3 2 SM 5417 Rev 1 October 2009 AnsaldoSTS Installation and Adjustments vate m END Figure 3 2 Point Detector Relationships When it becomes necessary to alter the circuit controller contact combination each pair of Reverse Point Detector contacts may be converted from Assembly T to Assembly U and each pair of Normal contacts from Assembly W to Assembly V Figure 3 3 or vice versa observing precautions for contact adjustment given in Section 4 2 Assembly W Assembly T Contacts are open when Switch Contacts are open when Switch and Mechanism are in Normal and Mechanism are in Reverse Position losition am 28 kum EXE SERE a ul Assembly U Assembly V Contacts are closed when Switch Contacts are closed when Switch and Mechanism are in Reverse and Mechanism are in Normal Position Position Reverse Point Detector kasme Contacte Contacts Figure 3 3 Contact Assemblies SM 5417 Rev 1 October 2009 3 3 5
33. ke into account every eventuality that may arise with technical equipment in service Please consult an ASTS USA local sales representative in the event of any irregularities with our product ASTS USA expressly disclaims liability resulting from any improper handling or use of our equipment even if these instructions contain no specific indication in this respect We strongly recommend that only approved ASTS USA spare parts are used as replacements SM 5417 Rev 1 October 2009 77 AnsaldoSTS Revision History Revision History DATE NATURE OF REVISION Incorporated ECO 139712 346 added note to Section 4 1 1 October 2009 Incorporated 140250 17 added switch stand numbers to Section 5 1 Added new diagram for Figure 5 1 SM 5417 Rev 1 October 2009 5 2 7 AnsaldoSTS Table of Contents Table of Contents 1 GENERAL INFORMATIONN al sana ka e duo ra Q 1 Y 1 1 ATMO p 1 1 1 22 General oI 1 2 159 JADDIICSIOLS Ode TE TTA 1 3 2 OP RATIONS uu a a doct 2 1 2 1 Switch Operating Mechanism iii 2 1 212 OC CONTONE o n i a Motum ud dust 2 1 SIA teet 2 1 2 2 2 Heavy Duty Type for reference only
34. n latch bracket at CI and 1 urged into latching position by small springs Under certain conditions however the latch 1s tripped out of place by point detector operation 2 6 SM 5417 Rev 1 October 2009 5 77 AnsaldoSTS Operation When the movement is hand operated to the Reverse position the lock bar L moves to the right 1 out of the lock rod The lower step on lock bar dog engages and lifts roller thus rotating latch bracket B counterclockwise and closing knife blade contacts F before the lock bar has cleared the lock rod see Figure 2 4 b As the lock bar continues its stroke the top step of lock bar dog K engages roller M to complete the stroke of latch bracket B and fully closes the contacts F Figure 2 4 c contact arm A is stopped by its lugs Al engaging lugs on the frame thus restricting the rotation of the contact arm to a somewhat less than the rotation of the latch bracket B This difference in rotation pulls the step of latch D away from the underside of latch adjusting screw G a distance of approximately 1 16 In this position Figure 2 4 c the spring sockets H just touch the latch bracket B by adjustment of the nuts on spring eyebolts J therefore the contacts F would be operated to the position shown by lock bar withdrawal even though springs S were broken When the switch is hand operated back towards the Normal position the lock bar L moves to the left 1 towards the lock rod Roller
35. n step 2 recheck the adjustment given in 2 NOTE When contacts per Assembly W are used in combination with contacts per Assembly V Figure 3 3 adjust them so that one group opens 3 64 to 1 16 before the other closes as the switch mechanism 1 operated X REVERSE POINT POINT DETECTOR DETECTOR STUD ROLLER ki SWITCH IN NORMAL POSITION j j SWITCH IN REVERSE POSITION Figure 4 1 Sleeve Type Point Detector Bar With the switch stand in normal position and the roller on the point detector lever F engaging the bottom of the groove the point detector bar adjust the conical headed screw K2 until 1t just touches the finger Fl on the point detector lever Back off screw K2 one half turn and lock place 4 2 1 Point Detector Latch See Figure 2 3 The point detector latch screw JI should be adjusted so that 7 32 to 1 4 motion of the point detector measured from the position in which the rise in the groove 1 just touching the roller F3 with all lost motion taken up causes the contacts to become latched 1n the closed or open position To obtain this proceed as follows With the mechanism and lock bar normal position adjust the latch screw JI so that there 1 a vertical clearance of 1 8 min 5 32 in max between the horizontal latching faces of latch screw and finger F2 when the roller F3 is riding on the large diameter of the point detector See Figure 2 3 With
36. osition as shown in Figure 2 4 a If necessary the arm extension may be bent to obtain the protection for Reverse position without binding in Normal position placing a block between the arm near roller M and the lock bar to insure that roller M is not subjected to the blows 4 4 Lubrication 4 4 1 T 20 amp T 21 Switch Stands When sent out from the factory all working parts of the mechanism and circuit controller are sufficiently lubricated to be placed service Lubricant for use in the crank bearings lever shaft bearings detector rod bearings and the target shaft bearing T 21 stand should be pressure gun grease high quality bearing grease Suitable lubricating fittings see Figure 4 2 are provided to permit of applying the lubricant with a gun This same lubricant is satisfactory for the gear and rack teeth lock bar contact operating dog the underside of the rocker arm and wearing surfaces of the operating crank Oil pockets and holes are provided for lubricating the rollers on the underside of the rack see Figure 2 2 A good grade of medium heavy engine oil should be used to lubricate these rollers and all pin bearings of the circuit controller see Figure 4 2 Grease or dirt should not be allowed to accumulate in or around the oil pockets in the rack since proper lubrication of the rack rollers depends on the oil flowing through the holes from the pockets 4 4 2 Heavy Duty Circuit Controller Lubricant for use in the
37. out 395798 View 2 shown in Right hand Figure 5 1 switch point closed SM 5417 Rev 1 October 2009 5 5 55 Parts list 77 AnsaldoSTS ITEM NO DESCRIPTION PART NUMBER USEDON 85 Target Staff Low 451846 4802 Optional Stub L H Point Closed Target Staff Low 451846 4803 Optional Stub R H Point Closed 5 6 SM 5417 Rev 1 October 2009 74 AnsaldoSTS NOTE D POINT DETECTOR COVER amp POINT DETECTOR BAR TO BE REMOVED amp BE WIRED TO THE HAND THROW LEVER FOR SHIPMENT AFTER ASSEMBLY HAS BEEN COMPLETED AND CHECKED CLOSE OPENINGS IN BASE WITH ITEMS 49 amp 51 NOTE E HOOK END OF TENSION SPRING ITEM 59 TO BE CLOSED TO HOLD SPRING ATTACHED TO HOLE IN ANGLE NOTE H MOUNT PINION ITEM 7 WITH ROUND HUB OVER LOCK BAR ITEM 16 WHEN LOCK BAR IS DRIVEN BY RACK FOR LOOSE LOCK BAR ITEM 16 MOUNT PINION WITH LUG OVER LOCK BAR NOTE J WHEN SWITCH LAYOUT DOES NOT REQUIRE A LOCK ROD CLOSE OPENINGS IN BASE OF MECHANISM WITH MATERIAL PER ITEMS 72 73 47 74 75 NOTE K WHEN SWITCH LAYOUT DOES NOT REQUIRE A PT DETECTOR ROD CLOSE OPENINGS IN MECH BOX WITH ITEM 60 NOTE Y CUSTOMER TO MODIFY HEIGHT OF SHAFT IN FIELD DRILL FOR APPLICATION OF LAMP TIP USING 1 1 4 O D ADAPTER amp TARGET WHEN REQUIRED SEE NOTE D 49 REVERSE DET STUD THIS SIDE e NORMAL PT DET ROLLER me m STUD VIE
38. parts a sixty degree rotation to the escapement crank and the switch operating crank The working surfaces of both the escapement crank E and the engaging roller are heat treated and hardened The switch operating crank G 15 assembled on the two inch square section of the escapement crank E between the upper and lower bearings These two bearings take directly the operating rod loads and thus promote long life The locking of the switch operating rod 15 effected by having the engaging roller RI over travel the escapement crank at each end of the stroke 2 2 Circuit Controller 2 2 1 Standard Type The standard circuit controller for the T 20 switch stand Figure 2 3 provides normal indication through four pairs of contacts 51 52 selectively operated by either the dog PI on the lock bar P or the point detector bar V When the hand throw lever is operated from the normal position the dog located near the locking end of the lock bar rotates the rocker arm K counterclockwise The left end of the rocker arm then forces the contact operating bracket DI downward in opposition to the phosphor bronze coil springs which maintain the normal position of the contacts The first 5 8 to 3 4 motion of the lock bar completes the circuit controller operation before the lock bar P 1s completely withdrawn from the lock rod Q Point detector operation consists of transferring motion from the point detector bar V to the rocker arm K in one direction onl
39. r reference only 5 13 6 RAIL TEAM AND TECHNICAL SUPPORT 22222 1 1 0 6 1 SM 5417 Rev 1 October 2009 ili Table of Contents Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 1 6 Figure 1 7 Figure 1 8 Figure 1 9 Figure 1 10 Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 4 1 Figure 4 2 Figure 5 1 Figure 5 2 Figure 5 3 A 77 AnsaldoSTS List of Figures OA E 1 1 T 20 Switch Stand With Cover Removed RL 1 1 ee ilen S anu nn T katu T 1 1 Single Switch ADDIC ATION s 5 1 3 Cr OSSOVET 1 4 Crossover Switches With Hand Lever Operation 0000 1 4 nn ea N 1 4 OS cua aa ee het 1 5 Right Hand Layout for the Style T 20 or T 21 Switch Stand 1 6 Operating 1 7 Assembly Views of Style T 20 Switch Stand 2 2 Top And Bottom Views of Rack Escapement And Switch Operating Crank 2 3 Sectional Views of Standard Circuit Controller 2 4 Sectional Views of Heavy Duty Circuit Controller for reference only 2 6 Mutat Et s 2 8 Typ
40. rmally open Four fixed Jaws with external lug terminals are engaged in pairs by two inverted U shaped knife blades when either the lock bar or the point detector bar or both 1s not in its Normal position If the contacts are closed by displacement of the point detector bar while the lock bar remains in the notch in the lock rod as when a switch is improperly trailed the contacts will remain closed thereafter even 1f the point detector bar returns to its Normal position This action 1s equivalent to the point detector latch operation in the standard circuit controller and the controller may be similarly reset provided that the point detector bar and the lock rod are 1n proper alignment by hand operating the switch to the Reverse position and back 1 2 SM 5417 Rev 1 October 2009 N 7 AnsaldoSTS General Information again to the Normal position However if the latching device has been tripped because of an improper trailing move through the switch the switch and the hand operating mechanism should be carefully examined for possible damage before resetting the circuit controller Both the heavy duty and the standard circuit controllers have a point detector latch feature which will hold the normal contacts in their reversed positions after they are shifted by traffic improperly running through the switch locked in the normal position even though the point detector bar may return to or beyond its normal position The movement 1 protecte
41. rmined by observing rigidity of spring bolts If necessary adjust nuts P to obtain this seating without undue strain Under the conditions just described in the preceding paragraph swing the upper end of latch D Figure 2 4 c toward the contacts and observe that 1 returns freely beneath the head of adjusting screw G This 15 necessary to assure that the latch will reset after being tripped Nominal clearance of 1 16 as shown in Figure 2 4 c 1 provided in manufacture If wear of parts in service should reduce this clearance until the latch does not return freely beneath the screw head clearance may be restored by filing the latch step CAUTION It is essential that the head of adjusting screw G bear only on the outer corner of the latch step Use a half round or a three cornered file to insure that inner corner of the latch step is kept clear If the filing 15 done carelessly on the outer corner only the latch may work out to tripping position under traffic vibration Having checked the adjustments described in the preceding paragraphs return the mechanism to Normal position see Figure 2 4 a With the groove in point detector bar V lined up with roller DI on latch D the roller DI should just touch but not bind on the small diameter of the bar Note that the roller is urged toward the bar by action of spring while its travel 15 limited by engagement of the upper end of the latch against the end of screw G If necessary adjust
42. s notch the lock rod thereby locking the switch points their normal position to afford facing point lock protection In addition the escapement crank mechanism 1 such that the driving system itself locks the switch either extreme position The T 20 ordinarily 1s equipped with a standard circuit controller which has four pairs of independent contacts that are shifted in unison and check that both the mechanism including lock bar and the switch points by the point detector are the Normal position This circuit controller may also be fitted with a reverse point detector feature consisting of additional contacts located on a separate terminal board which check the switch points the Reverse position NOTE ASTS USA no longer manufactures the heavy duty circuit controller The heavy duty circuit controller descriptions below and throughout this manual are only applicable to existing switch machines and should be used for reference only For heavy duty shunting the switch stand 1s fitted with a heavy duty instead of standard circuit controller Reverse point detection 1s not available with this type of controller The heavy duty circuit controller for the Styles T 20 and T 21 hand operated switch mechanisms is interchangeable with and is used in place of the standard circuit controller for shunting track circuits electrified territory and other heavy duty shunting The contacts are of the knife blade type and are no
43. s to normal the reverse sequence of operation 15 necessary SM 5417 Rev 1 October 2009 1 3 NY General Information AnsaldoSTS Aka Figure 1 5 Crossover Switches The application in Figure 1 6 shows crossover switches that use the Y stand Figure 1 8 The stands have independent locking bars and are operated from a hand throw lever at Z 09 TRE Figure 1 7 Assembly SM 5417 Rev 1 October 2009 N 7 AnsaldoSTS General Information Figure 1 8 Y Assembly Typical application to a single switch 1s illustrated Figure 1 9 Standard switch fittings are used throughout and the layout 1s reversible for either right or left hand except where circumstances such as tie spacing point drilling etc require both horizontal set and vertical set in the rods The switch stand however can always be assembled for either right hand or left hand application and in either application the switch point adjacent the stand may be normally open or normally closed For the usual application to a single switch with or without derail connection Figure 1 4 or Figure 1 9 the lock bar P is fitted with a stud P2 which engages with rack so that it and the lock bar move as one member when the hand lever is thrown Figure 1 7 For applications where switch stands at the ends of a cross over are interlocked Figure 1 5 and Figure 1 6 the dependent stands designated Y have a lock bar
44. screw to obtain this condition and retighten lock nut GI SM 5417 Rev 1 October 2009 4 3 Y Maintenance 77 AnsaldoSTS Next shift the point detector bar until the large diameter 1 opposite the roller and observe that the latch is thereby pulled out from under the head of screw G to allow free clearance for contact arm to drop down The dimensions shown for this clearance on Figure 2 4 e are nominal values for anew mechanism Should wear of parts in service eventually result in doubtful clearance the clearance may be increased by filing the vertical edge of the latch step With the mechanism in Normal position illustrated in Figure 2 4 a withdraw the lock bar until the roller is on the first part of dog as shown Figure 2 4 b The contacts should be closed although they will not be engaged to their full stroke position Failure to obtain this condition indicates wear in pins or rollers requiring replacement The long arm projecting to the right from latch bracket B prevents opening of the contacts when the lock bar 1 withdrawn so that the dog has moved out from under roller towards the Reverse position indicated dashed lines at right side of Figure 2 4 c Check this protection by lifting the contact arm A until motion is stopped by engagement of the arm extension with the dog In new controllers the arm will provide this protection when it clears the lock bar by a nominal 1 32 to 1 16 with mechanism in Normal p
45. t Part numbers ITEM NO DESCRIPTION PART NUMBER Cover Complete N106162 includes items 3 amp 4 SW PT H L H H H H L H H R H L H R H H L H R H Rack Complete N103462 Includes the following Foe wams sa All All All All All All All All SM 5417 Rev 1 October 2009 5 1 Parts list 4 AL o D 2 7 ITEM NO O O NIN a lt i N CO NIO gt DESCRIPTION PART NUMBER Crank M103456 Escapement M101401 M101444 Ali N103551 B C D G H N103854 N106778 gt gt J K L M N A B C D E F G H LJ K L M N Circuit Controller N213496 Circuit Controller N213496 001 Bar Point Det N107199 Bar Point N105110 Det Operating Lever 103457 All Journal Bearing M194803 N105792 All E Lever Hand Throw Complete includes the following Shaft M210138 Counterweight M435597 Lock Bar Rack N103960 Driven A A Lock Bar Rack N103445 B E F G H Driven lJ K L M N Lock Bar Loose N105169 C D Hasp Complete N102112 All includes the following N 101443 Pin Roll J487301 A Tee Bolt M103344 A Bolt Cover Hold 103381 All Down Screw 1 2 13 x J050090 1 1 4 Hex Screw 1 2 13 x J050089 B E F G H I J K L
46. y so that selective operation of the contacts 15 obtained as stated When the point detector bar 1 displaced from its normal position by movement of the switch points the lever F which carries the roller F3 turns clockwise This motion in turn rotates the rocker arm K counterclockwise by reason of the engagement of the head of finger with the conical headed screw K2 on the rocker arm Rotation of the rocker arm counterclockwise causes the contacts to function as in normal operation SM 5417 Rev 1 October 2009 2 1 N Operation 77 AnsaldoSTS ope ses NI x i A E SSR A TE REN YD AR n 4 rm la men A AUN fii R3 10 2 E TOTAL TRAVEL 3 OF MOTION PLATE z 7 2 ATE a o z li LA M wmm R N 4 m fo M 77 L L tS E i A rex iwa 55 SS M ENLARGED VIEW OF POINT K DETECTOR CONTACTS FOR BOTH ENLARGED END SECTION NORMAL AND REVERSE SHOWING CONTACT SWITCH POSITIONS OPERATING BRACKET SECTION Y Y Figure 2 1 Assembly Views of Style T 20 Switch Stand 2 2 SM 5417 Rev 1 October 2009 5 77 AnsaldoSTS Operation BOTTOM VIEW Figure 2 2 Top And Bottom Views of Rack Escapement And Switch Operating Crank SM 5417 Rev
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