Emerson Fisher 685 Installation Instructions
Contents
1. MAXIMUM VALVE TRAVEL APPROXIMATE WEIGHT FOR ACTUATOR SIZE kg Ibs mmf inches 2 6 8 20 2 a 102 4 0 847 1866 168 370 26257 311 686 89 1961 375 2150 305 12 00 157 346 245 541 292 643 337 742 457 1008 535 1180 Instruction Manual 685 Piston Actuator D103626X012 September 2014 Table 5 Approximate Weights for Constructions with Handwheels MAXIMUM VALVE TRAVEL APPROXIMATE WEIGHT FOR ACTUATOR SIZE kg Ibs Ca 3 573 1924 555 1092 2308 508 20 00 252 555 397 876 331 729 495 1092 715 1576 794 1751 990 2182 1088 2398 610 24 00 264 583 415 914 350 773 516 1138 746 1644 827 1823 1029 2268 1129 2488 Table 6 Lifting Point Load Ratings LIFTING MAXIMUM LOAD ACTUATOR SIZE ORIENTATION NUMBER OF LIFTING POINTS USED bs 12to 24 Actuator Centerline 3400 Horizontal 6300 12to 24 Actuator Centerline 8300 vertical 4000 Installation WARNING Always wear protective gloves clothing and eyewear when performing any installation operations to avoid personal injury To avoid personal injury or property damage caused by bursting of pressure retaining parts be certain the cylinder pressure or other pressure ratings do not exceed the limits listed in table 1 Use pressure limiting or pressure relieving devices to prevent cylinder pressure or other pressures from exceeding these limits Check with your process or safety engin2. 8 Tie Bolt Torque BOLT DIAMETER O N ee 21 8 328 1 8 7 488 Instruction Manual 685 Piston Actuator D103626X012 September 2014 Parts Ordering When corresponding with your Emerson Process Management sales office about this equipment refer to the serial numbers there are two serial numbers located on the actuator found on the actuator nameplate key 22 Also specify the complete 1 1 character part number from the following Parts List when ordering replacement parts A WARNING Use only genuine Fisher replacement parts Components that are not supplied by Emerson Process Management should not under any circumstances be used in any Fisher valve because they may void your warranty might adversely affect the performance of the valve and could cause personal injury and property damage Parts Kits Includes all soft seals and O rings required for seal and O ring replacement in standard operating temperature constructions Refer to figures 2 and 3 EE re Temperature Bearing O ring Rey 15 R685X000032 R685X000112 R685X000192 Bearing Quad Seal Key 12 Piston Pod O ring Key 19 R685X000042 R685X000122 R685X000202 Piston Wear Ring Key 6 R685X000052 R685X000132 R685X000212 Piston Quad Seal Key 7 R685X000062 R685X000142 R685X000222 Upper Lower Head O ring Key 2 Upper Lower Head O ring Key 2 RO AEE Sige R685X000082 R685X000162 R685X000242 11 685 Piston Actuator September 2014 Parts List
3. key 21 and the lower head key 9 assembly onto cylinder key 4 taking care not to damage threads on the tie bolts key 3 Be sure the O ring key 2 is in place during this step 31 Install lock washers key 10 and tie rod hex nuts key 11 onto tie bolts key 4 Torque in a crisscross pattern according to table 2 If the actuator has a handwheel manual override proceed to step 32 otherwise proceed directly to step 37 32 Re position the actuator so it is right side up with the yoke key 21 flat against the ground Cloth or wood should be used to prevent against paint damage 33 Remove the hex head cap screws key 20 and lock washers key 10 that secure the yoke key 21 to the lower head key 9 34 Using the same lifting eyes as in the Actuator Removal section attach appropriate rigging gear and remove the cylinder assembly from the yoke key 21 The rigging gear should allow the cylinder to be rotated freely Rotate the cylinder assembly to screw the engage disengage block key 43 onto the piston rod key 17 until the gap measured in step 3 is achieved 35 Tighten the set screw key 36 into the engage disengage block key 43 36 Secure the cylinder assembly to the yoke using the hex head cap screws key 20 and lock washers key 10 Torque in a crisscross pattern according to table 8 37 Referto the Actuator Mounting section of this manual for instructions on mounting and installing the actuator onto a valve Table
4. the piston rod to the specified valve travel 5 Attach the stem connector key 18 clamping the piston rod key 17 to the valve stem Be sure you also attach the feedback arm and travel indicator 6 Cycle the actuator to check availability of desired total travel and that the valve plug seats before the cylinder reaches the end of its stroke You can make minor travel adjustments if necessary by loosening the stem Instruction Manual 685 Piston Actuator D103626X012 September 2014 connector slightly tightening the locknuts together and with the valve plug off the seat screwing the stem either into or out of the stem connector by means of a wrench on the locknuts 7 f thetotal travel is adequate tighten the stem connector key 18 securely lock the stem locknuts if present against the connector and adjust the indicator scale key 22 on the yoke key 21 to show valve plug position 8 Provide a gauge if necessary to measure the pressure to the actuator Make a final adjustment on the positioner to set the starting point of valve travel and to obtain full travel for the given instrument range Handwheel Operation If manual operation is required the actuator should be equipped with a manual handwheel CAUTION To avoid damage to actuator parts and difficult operation of actuator handwheels open the bypass valve key 66 before using a handwheel The bypass assembly is furnished only when a handwheel actuator is specifi
5. Instruction Manual 685 Piston Actuator D103626X012 September 2014 Fisher 685 Piston Actuator Contents Figure 1 Fisher 685 Piston Actuator 2255 1 Scope Of Manual DescrpboH db pe aene 1 Specifications 2 Educational Services 3 Principle of Operation 3 SCAN 5 Three Way Valve Applications Note 6 Actuator Mounting 6 Handwheel Operation 7 Maintenant 8 Actuator Removal 8 Seal and O ring Replacement 9 Parts Ordening 25 11 PANES IE ae ois keira Kane PRESA ES dd 11 ae 12 Introduction Scope of Manual This instruction manual provides information on the installation maintenance and parts ordering for Fisher 685 piston actuators Refer to separate instruction manuals for information regarding other equipment and accessories used with these actuators Do not install operate or maintain a Fisher 685 actuator without being fully trained and qualified in valve actuator and accessory installation operation and maintenance To avoid personal injury or property damage it is important to ca
6. Note For part numbers not shown contact your Emerson Process Management sales office Common Parts fiqures 2 and 3 Key Description 1 Upper Head 2 Upper Lower Head O ring 3 TieBolt 4 Cylinder 5 Piston 6 Piston Wear Ring 7 Piston Quad Seal 9 Lower Head 10 Lock Washer 11 Tie Bolt Hex Nut 12 Bearing Quad Seal 13 Bearing O ring 14 Bearing 15 Piston Rod Wiper Seal 16 Bearing Retaining Ring 17 Piston Rod 18 Stem Connector 19 Piston Rod O ring 20 HexHeadCap Screw 21 Yoke 22 TravelScale 5 Stem Connector Hex Nut 58 Stem Connector Stud 100 Multi purpose Grease MPG 2 or approved equivalent 12 Instruction Manual D103626X012 Manual Handwheel Parts figure 2 Key Description ACME Thrust Shaft Override Guide Shaft Worm Gear Thrust Shaft Upper Bushing Thrust Shaft Bushing Thrust Bearing Thrust Guide Block Engage Pin Guide Guide Block Engage Screw Engage Pin Control Knob Engage Spring Pin Socket Head Cap Screw Socket Set Screw Key Override Engage Pin Position Indicator All Thread Stud Flat Washer Yoke Adaption Bracket Engage Disengage Block Stem Connector Stud Handwheel Helix Housing Cap O ring Helix Gear Shaft Bushing Helix Gear Bushing Helix Worm Gear Housing Helix Worm Gear Helix Gear Shaft Spacer Helix Shaft Wiper Seal Helix Worm Gear Shaft Helix Gear Housing Cap Ext Tooth Lock Washer Pointer Instruction Manual 685 Piston Actuator D103626X012 September 2014 Figure 2 Fishe
7. ST HANDWHEEL DIAMETER TURNSPER mm TURNS PER MA MUVIRIMEORGE OF TRAVEL i 685 Piston Actuator Instruction Manual September 2014 D103626X012 Maintenance WARNING Avoid personal injury from sudden release of process pressure Before performing any maintenance operations e Do not remove the actuator from the valve while the valve is still pressurized e Always wear protective gloves clothing and eyewear when performing any maintenance operations to avoid personal injury e Disconnect any operating lines providing air pressure electric power or a control signal to the actuator Be sure the actuator cannot suddenly open or close the valve Use bypass valves or completely shut off the process to isolate the valve from process pressure Relieve process pressure on both sides of the valve Drain the process media from both sides of the valve e Use lock out procedures to be sure that the above measures stay in effect while you work on the equipment e The valve packing box may contain process fluids that are pressurized even when the valve has been removed from the pipeline Process fluids may spray out under pressure when removing the packing hardware or packing rings or when loosening the packing box pipe plug e Check with your process or safety engineer for any additional measures that must be taken to protect against process media Instructions are given below for complete disassembly of the actuator seal replacement
8. and O ring replacement When inspection or repair is necessary disassemble the actuator only as far as is required to accomplish the job Key numbers referenced in the following steps are shown in figures 2 and 3 Actuator Removal The following procedure is for the removal of the actuator from a valve 1 Disconnect the actuator tubing from the pressure connections on the upper and lower heads keys 1 and 9 and positioner Note Refer to the appropriate instruction manual for any maintenance or adjustments that need to be made on the positioner 2 Breakthe stem connection by removing hex nuts key 57 lock washers key 10 and studs key 58 from the stem connector key 18 3 Remove the bonnet to actuator bolting securing the actuator to the valve bonnet 4 Thread two lifting eyes into the free ports on the upper head key 1 180 degrees apart Reference tables 4 and 5 for approximate weights of the actuator to select an appropriate lifting eye Attach appropriate rigging gear to both lifting eyes and lift the actuator away from the valve bonnet and stem 5 Place the actuator upside down with the upper head key 1 flat against the ground Cloth or wood should be used to prevent against paint damage 6 Referto the Actuator Mounting section of this manual for instructions on mounting and installing the actuator onto a valve Instruction Manual 685 Piston Actuator D103626X012 September 2014 Seal and O ring Replacement The follo
9. ation 685 piston actuators utilize a pneumatically controlled piston that moves inside of a cylinder to generate thrust A seal contained on the circumference of the piston provides a seal between the piston and the cylinder preventing supply pressure leakage From an equilibrium state the actuator operates by reacting to a force unbalance that is created by increasing supply pressure on one side of the piston and decreasing it on the other This moves the piston up or down and results ina repositioning of the attached control valve Travel can be adjusted using travel limits within a valve positioner which limit the travel range of the actuator The optional handwheel manual override does not have the ability to act as a hard travel stop An optional handwheel manual override is capable of extending or retracting the actuator manually and can be engaged at any position from full open to full close This override utilizes a worm gear assembly that is attached to the stem connector and not attached to the cylinder or piston rod This enables the manual override to reposition the control valve even if the actuator cylinder or piston is removed for maintenance Table 2 Standard Constructions SIZE DIAMETER AREA CONNECTOR SIZE DIAMETER Minimum Maximum mm for Area m 35 1 zos oms _ 4 3 3 35 Wrews 0 7 3 3 9 z vom m 38 4 3 192 z v
10. being installed without a positioner the cylinder loading pressures should be supplied through a 4 way solenoid valve or a switching valve The top and bottom sides of the piston are pressurized through the upper and lower heads i e top and bottom of the cylinder The supply pressure medium should be clean dry filtered air If the supply source is capable of exceeding the maximum actuator operating pressure or positioner supply pressure appropriate steps must be taken during installation to protect the positioner and all connected equipment against over pressurization The control valve should be located where it will be accessible for servicing Room should be left above and below the control valve to permit removal of the actuator and valve plug Three Way Valve Applications Note In three way valve applications where the actuator fully strokes at a frequency of once per minute or faster and the stroking speed is rapid less than 0 5 seconds per stroke there is a possibility that the stem can fracture at the plug if the actuator cylinder pressure is greater than 5 5 bar 80 psig This can cause loss of control of process fluid and further damage to the actuator Consideration should be given to the use of high strength fatique resistant stem materials in these applications Actuator Mountinq The following procedure describes how to mount a 685 actuator on a push down to close valve so that the piston rod to valve plug stem connection al
11. ed The bypass allows the pressure to equalize on either side of the piston so that the manual actuator can be used to position the control valve Flow through the bypass tubing is controlled by an angle needle valve which is operated manually This valve should be closed when air pressure is being used to operate the actuator Key numbers referenced in the following steps are shown in figure 2 Refer to table 7 for handwheel specifications 1 Open the bypass valve 2 Rotate the handwheel key 45 to position the override engage pin key 38 with the hole in the stem connector key 10 Turn the engage pin control knob key 33 clockwise to insert the override engage pin into the stem connector until it stops Note Depending on construction the handwheel may have operation information stamped into the part Always refer to steps 3 and 4 for operation information specific to push down to close and push down to open valves 3 For a push down to close valve Rotate the handwheel key 45 clockwise to close the valve and counterclockwise to open the valve 4 Fora push down to open valve Rotate the handwheel key 45 counterclockwise to close the valve and clockwise to open the valve 5 To disengage the manual handwheel rotate the handwheel key 45 to relieve any load placed on the override engage pin key 38 turn the engage pin control knob key 33 counter clockwise until it stops Table 7 Handwheel Specifications OUTPUT THRU
12. eer for any additional measures that must be taken to protect against process media If installing into an existing application also refer to the WARNING at the beginning of the Maintenance section in this instruction manual Dropping the actuator and any attached accessories and or valve may cause personal injury and or equipment damage For all mounting procedures use an adequately sized chain sling hoist or crane to handle the actuator and any attached accessories and or valve Use caution during lifting and handling to prevent slippage swinging faulty equipment connections or sudden shock loads CAUTION Special care must be taken when installing an actuator in a horizontal service orientation To avoid cantilever loads on the valve stem and yoke it is the customer s responsibility to ensure proper support for a horizontal actuator When an actuator and control valve are shipped together as a control valve assembly the actuator is normally mounted on the valve Follow the valve instructions when installing the valve in the pipeline If the actuator is shipped separately or if it is necessary to mount the actuator on the valve perform the actuator mounting procedures in this instruction manual Refer to the individual product instruction manuals for the installation or mounting of a FIELDVUE DVC6200 digital valve controller or 3610 positioner 685 Piston Actuator Instruction Manual September 2014 D103626X012 If the actuator is
13. in 51 mm 2 inch increments between 305 mm 12 inch and 660 mm 26 inch See table 2 S31603 316L stainless steel Weights See tables 4 and 5 Operative Temperature Limits Standard 40 to 93 C 40 to 200 F Low Temperature 54 to 93 C 65 to 200 F 3 High Temperature 29 to 204 C 20 to 400 F Yoke Boss and Valve Stem Diameter B 127 mm 5H inch yoke boss with 32 mm 1 1 4 inch stem 178 mm 7 inch yoke boss with 51 mm 2 inch stem Lifting Point Load Ratings See table 6 1 The pressure temperature limits in this bulletin and any other applicable standard or code should not be exceeded 2 Consult factory for larger travels or cylinder diameters The Fisher 585C family of actuators are available for smaller travels or cylinder diameters 3 Consult factory for applications requiring low or high temperature requirements Specifications Specifications for 685 piston actuators are given in table 1 Refer to the nameplate affixed to the actuator yoke for specifications specific to individual constructions Instruction Manual 685 Piston Actuator D103626X012 September 2014 Educational Services For information on available courses for Fisher 685 piston actuators as well as a variety of other products contact Emerson Process Management Educational Services Registration Phone 1 641 754 3771 or 1 800 338 8158 E mail education emerson com http www emersonprocess com education Principle of Oper
14. lows full travel and proper shutoff Key numbers referenced in the following steps are shown in figures 2 and 3 If you purchase a 685 actuator for field installation on a control valve mount the actuator on the valve and secure it to the bonnet with the eight bonnet to actuator bolts The stem connection should then be made up to clamp the actuator stem and valve plug stem together to provide proper valve travel CAUTION If the valve stem is allowed to remain in the up position towards the actuator during mounting it can interfere with the actuator mounting possibly damage valve stem threads or bend the valve stem Be sure the valve stem is pushed down into the valve body away from the actuator while mounting To avoid damaging the seating surfaces do not rotate the valve plug while it is seated Also avoid damage to the valve plug stem by careful use of tools during travel adjustment 1 Thread two lifting eyes into the free ports on the upper head key 1 180 degrees apart Reference tables 4 and 5 for approximate weights of the actuator to select an appropriate lifting eye Attach appropriate rigging gear to the lifting eyes 2 Slowly lower the actuator down onto the valve Once the actuator is in place insert the bonnet to actuator bolts and tighten the hex nuts 3 Turn the two stem locknuts if present all the way onto the valve stem thread 4 Starting with the cylinder fully retracted manually or with air pressure extend
15. move tie rod hex nuts and lock washers key 10 9 Remove the yoke key 21 and the lower head key 9 assembly from the cylinder key 4 and place onto a flat surface with the O ring side facing up Using straps secure this assembly to a solid structure to prevent it from falling over 10 Extract bearing assembly keys 12 13 14 and 15 from lower head key 9 by removing the bearing retaining ring key 16 11 Remove the piston wiper seal key 15 O ring key 13 and quad seal key 12 from the bearing key 14 12 Clean bearing key 14 with a light degreaser if needed 13 Lightly grease the new O ring key 13 and quad seal key 12 then install onto bearing key 14 Without grease install a new piston wiper seal key 15 onto the bearing 14 Reinstall bearing assembly keys 12 13 14 and 15 into lower head key 9 and secure in place with the bearing retaining ring key 16 15 Remove the O ring key 2 from the lower head key 9 and clean the groove with a light degreaser 16 Lightly grease the new O ring key 2 and install on lower head key 9 17 Remove tie bolts key 3 from upper head key 1 18 Lift piston assembly keys 5 6 7 17 and 19 out from cylinder key 4 and place on a flat surface 19 Remove the wear ring key 6 and quad seal key 7 from the piston key 5 20 Thread locking compound is applied to the threads of the piston rod key 17 by the manufacturer during initial assembly As a res
16. om 0 39 4 23 z vs 3 m 2 3 4 325 35 uev 3 0 x 9 mw z ev 3 9 35 395 171 25 60 Inches inch for Area m m a m mkn so 8 D E I N11 4 91 1 4 or 2 5H or 7 4 91 254 1 4 or 2 5H or 7 9 62 I 5H or 7 1 Consult your Emerson Process Management sales office for additional sizes 685 Piston Actuator Instruction Manual September 2014 D103626X012 Table 3 Thrust THRUST AT SUPPLY PRESSURE N 1 ACTUATOR SIZE TROKE p iis 4 1 barg 60 psig 5 5 barg 80 psig 6 9 barg 100 psig oia m 30183 6786 40245 9048 50306 11310 75459 16965 16965 41083 9236 54777 12315 68472 15394 102707 23091 Push 85457 00109 168083 38073 29540 6641 39387 8855 49234 11069 73851 16603 39773 8942 53030 11922 66288 14903 99432 22354 Pull 16 18 20 22 24 26 130873 29423 66602 14974 88803 19965 166506 37434 24 26 81956 18425 109275 24567 136593 30709 204890 46063 99563 22384 132751 29845 165938 37306 248907 55959 24 118166 26566 157555 35422 196944 44277 295416 66415 39 139127 31279 185503 41705 231878 52131 347817 78196 1 Consult your Emerson Process Management sales office for supply pressures below 40 psig 2 Maximum available thrust Table 4 Approximate Weights for Constructions without Handwheels
17. r 685 with Manual Handwheel Qe AS A L T S o NS 9 SA TWO UNS LLL LLL LLL ALS __ Te DO NOR OO 7 2 R 6 e 2 144229 e 36 D EI t 1 8 47 N LEFT SIDE VIEW FRONT VIEW 5 Saas PEDEM Ln IL Sgen SS E 5 Hm 9 027 RIGHT SIDE VIEW 09 DOG Aw TT _ WOO N N 22727777747777777777777777747777777777777772272727777727222277727 1565 685 Piston Actuator Instruction Manual September 2014 D103626X012 Figure 3 Fisher 685 without Manual Handwheel 4 3 OA 9 N mou ORT ANAS Ol X v io 022 TEP ad Non VON 109 13 2 1 iU O AA ex E m 16 17 p 21 E1566 Instruction Manual D103626X012 685 Piston Actuator September 2014 685 Piston Actuator Instruction Manual September 2014 D103626X012 Neither Emerson Emerson Process Management nor any of their affiliated entities assumes responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any product remains solely with the purchaser and end user Fisher easy e and FIELDVUE are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co Emerson P
18. refully read understand and follow all the contents of this manual including all safety cautions and warnings If you have any questions about these instructions contact your Emerson Process Management sales office before proceeding Description The Fisher 685 is a double acting piston actuator that provides accurate high thrust output for short to long travel applications This actuator is designed for use with a variety of medium to large Fisher sliding stem control valves including the easy e FB TBX HP EH and 461 LIT EMERSON www Fisher com Process Management 685 Piston Actuator September 2014 Table 1 Specifications Operating 1 Minimum 2 7 bar 40psig Maximum Allowable 10 3 bar 150 psig Consult your Emerson Process Management sales office for supply pressures under 2 7 bar 40 psi Travel 2 25 mm 1 inch through 610 mm 24 inch See table 2 Instruction Manual D103626X012 Pressure Connections Standard 3 4 NPT Optional 1 and 1 1 4 NPT Instrument Mounting Mounting kits are available for use with the FIELDVUE DVC6200 series positioner Construction Materials PART MATERIAL Thrust Capabilities ASTM A36 steel See table 3 ASTM A36 steel Cylinder 305 to 559 mm 12 to 22 inch Cylinder 1026 DOM steel with chrome plated bore 610 to 660 mm 24 to 26 inch Cylinder ASTM A516 Grade 70 steel with fluoropolymer coated bore Piston Diameter and Area 2 Available
19. rocess Management Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co All other marks are the property of their respective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or quarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Marshalltown lowa 50158 USA Sorocaba 18087 Brazil Chatham Kent ME4 4QZ UK Dubai United Arab Emirates Singapore 128461 Singapore wwwfishercom CEM ERSON Process en L 2013 2014 Fisher Controls International LLC All rights reserved dad cds a eggs M rc EE
20. ult disassembly will require heating to loosen the thread locking compound To remove the piston rod O ring key 19 heat the piston assembly using a torch and unthread the piston rod key 17 from the piston key 5 21 After the piston rod key 17 has completely cooled remove the piston rod O ring key 19 Clean the piston rod O ring groove with a light degreaser Lightly grease a new piston rod O ring and install onto the piston rod 22 Reinstall piston rod key 17 onto piston key 5 using thread locking compound 23 Clean piston seal grooves Install new lightly greased quad seal key 7 onto piston key 5 685 Piston Actuator Instruction Manual September 2014 D103626X012 24 Without grease trim to length and then install a new wear ring key 6 25 Lift cylinder key 4 vertically and place on a flat surface Take extra precaution to avoid scratching or gouging the inner diameter of the cylinder 26 Remove O ring key 2 from the upper head key 1 and clean the seal groove Install lightly greased new O ring into upper head seal groove 27 Install cylinder key 4 onto upper head key 1 making sure the O ring key 2 does not move out of its groove 28 Carefully install the piston assembly keys 5 6 7 17 and 19 into cylinder key 4 making sure all seals and O rings stay in place on the outside diameter of the piston key 5 29 Install tie bolts key 3 into upper head key 1 30 Carefully install the yoke
21. wing procedure is for the replacement of the internal piston seals bearing seals and O rings 1 Complete Actuator Removal procedures above If the actuator has a handwheel manual override proceed to step 2 otherwise proceed directly to step 8 2 Re position the actuator so it is right side up with the yoke key 21 flat against the ground Cloth or wood should be used to prevent against paint damage 3 Measure the gap between the piston rod key 17 and the engage disengage block key 43 up to 1 8 inch and make note as this will be used during reassembly 4 Remove the set screw key 36 from the engage disengage block key 43 5 Remove the hex head cap screws key 20 and lock washers key 10 that secure the yoke key 21 to the lower head key 9 6 Using the same lifting eyes as in the Actuator Removal section attach appropriate rigging gear and remove the cylinder assembly from the yoke key 21 The rigging gear should allow the cylinder to be rotated freely Rotate the cylinder assembly to unscrew the engage disengage block key 43 from the piston rod key 17 After the engage disengage block is removed secure the cylinder assembly to the yoke using the hex head cap screws key 20 and lock washers key 10 7 Placethe actuator upside down with the upper head key 1 flat against the ground Cloth or wood should be used to prevent against paint damage 8 Loosen tie bolt hex nuts key 11 in a crisscross pattern Re
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