62 Series Installation and Operation Instruction
Contents
1. pans Table Replacement Parts Part Description Qty Part Number 62 Series Filter Replacement Kit l B52555RK206K001 62 300 Series Filter Replacement Kit B52555RK047K001 Inlet Orifice O Ring 1 2 42082 012 62 3XX Inlet Orifice O Ring 2 2 42082 002 Seal Plate O Ring 1 2 42082 079 62 3XX Seal Plate O Ring 2 2 A21610 Base O Ring 4 42082 022 62 Series Orifice Filter Assembly 1 2 A25446 001 62 3XX Filter Support 2 l 54233 002 62 3XX Filter Tube 2 l A96158 001 1 Included in 62 Series Filter Replacement Kit 2 Included in 62 3XX Series Filter Replacement Kit Figure 2 Mechanical Null Adjustment 6 GENERAL SERVICING RECOMMENDATIONS a Disconnect electrical lead to servovalve b Relieve hydraulic system of residual pressure c Remove servovalve 7 TROUBLESHOOTING CHART The following troubleshooting chart list potential troubles encountered probable causes and remedies Potential Trouble Servovalve does not respond to command signal Probable Cause Controller does not function 2 Open controller cable 3 Open coil or open coil lead 4 Jammed spool Remedy Replace controller 2 Replace controller cable 3 Factory repair 4 Factory repair Output flow obtained from one control port only Actuator is at limit of stroke or hydraulic motor is rapidly rotating Limited or no response to command signal Controller not functioning properly 2 Filters s2. filter assembly for damage or foreign matter Unless they are new inlet orifice filter assemblies should be discarded and replaced each time they are removed f Inspect and replace O Ring as required g Place seal plate on a flat clean surface Install O Ring in seal plate Because O Ring is slightly larger than seal plate it will be necessary for assembler to lead O Ring into seal plate with a finger h Install seal plate containing O Ring Install end plate on servovalve body Install socket head cap screws or bolts and lockwasher Torque screws to 85 inch pounds i Repeat steps a through h for opposite end of servovalve 9 AUTHORIZED REPAIR FACILITIES Moog does not authorize any facilities other than Moog or Moog subsidiaries to repair its servovalves It is recommended you contact Moog at 716 652 2000 or visit www moog com industrial to locate your closest Moog repair facility Repair by an independent unauthorized repair house will result in voiding the Moog warranty and could lead to performance degradation or safety problems Replace controller ADDENDUM FOR 62 300 SERIES FILTER REPLACEMENT The following procedure is intended to supplement the Moog Inc Series 62 Electrohydraulic Servovalve Service Manual The Service Manual gives general information on field overhaul of 62 Series Valves however it is not correct for the replacement of filters for the 62 300 type servovalve The correct way to change the filt
3. 1 INTRODUCTION This manual provides instructions and procedures necessary to install operate and troubleshoot the Moog Series 62 Electrohydraulic Industrial Servovalve Troubleshooting instructions are outlined to permit the identification of the specific component s suspected of failure 2 OPERATION The Moog Series 62 Electrohydraulic Servovalve consists of an electrical torque motor a nozzle flapper pilot stage and a sliding spool main stage see Figure The torque motor includes coils polepieces magnets and an armature The armature is supported for limited movement by a flexure tube The flexure tube also provides a seal between the hydraulic and electromagnetic portions of the valve The flapper attaches to the center of the armature and extends down inside the flexure tube A nozzle is located on each side of the flapper so that the flapper motion varies the nozzle openings Pressurized hydraulic fluid is supplied to each nozzle through a filter and inlet orifice Differential pressures caused by flapper movement between the nozzle are applied to the ends of the valve spool The 4 way valve spool controls flow from the supply to either control port A or B The bushing contains flow control ports that are uncovered by spool motion A feedback wire is deflected by spool movement so that feedback torque is applied to armature flapper Electrical current in the torque motor coils causes either clockwise or counterclockwise to
4. CTOR MATES 1 75 44 45 WITH MS 3106 14S 25 SHOWN OVER CONTROL PORT 2 B ALTERNATE CONSTRUCTION OVER CONTROL PORT 1 A 4x 34 8 64 THRU LU 53 13 46 TO DEPTH SHOWN 86 22 22 IN RIGHT HAND END VIEW 1 60 MAX 40 62 3 20 MAX a 2 562 81 28 ion MANUAL OVERRIDE LEVER IF SO EQUIPPED 1 86 47 21 MAX e 4 77 121 04 MAX 2 95 74 90 l G 3 76 2s ace 95 41 71 11 1 1 87 22 21 M ay 44 11 11 PRESSURE PORT A CONTROL PORT NO 2 B CONTROL PORT NO 1 A a Ly g 48 MAX Y F i l 87 22 21 icy iy 12 06 D 440111 i ri H f L S iat RETURN PORT A 59 i 2 37 MAX 60 31 11 30 TYP 4 75 120 63 MAX RETURN PORT T rizs En Ta gt 875 lt 344 DIA THRU 4 VALVE MTG HOLES CBORE 50 DIA x 63 DP gt 575 a 015A 19 014 I7 gt 4a 301140 gt i00 ta 4 MOUNTING HOLES 4 PLACES 4 PL CO
5. NTROL PORT A Tt Ta E y 1 7500 3 88 j a75 Z 3 000 T 2 562 500 m TEUN X 194 i Y S2 i VALVE MOUNTS ON THIS MANIFOLD SURFACE CONTROL PORT B 136 DIA X 20 DEEP ma eaa 2015 PORT PER SAE J1926 10625 12 UN 2B 3 500 hke DASH 12 STR THD O RING PRESSURE PORTI BOSS 75 TUBE OD REF 63 4 PLACES CZ 0015 LY oe 2 00 A P 1 j 2 11 gt j 422 gt The products described herein are subject to change at any time without notice including but not limited to product features specifications and designs 4 Moog 62 Series Operation Instruction RevD 03 09 NOTES Fluid Industrial type petroleum base hydraulic fluid maintained to ISO DIS 4406 Code 14 11 recommended 2 Operating Temperature Range 0 F to 200 F 18 C to 93 C A Valve Phasing Flow out port B results when Series coils B amp C connected A D A Surface Surface to which valve is mounted requires finish flat within 002 0 05 TIR AX Null Adjust Flow out port B results with clockwise rotation of null adjust set screw s hex key TYPICAL WIRING SCHEMATIC Green 0 A Black Left Hand Right Hand White 0 B Red MOOG Industrial Controls Division Moog Inc East Aurora NY 14052 0018 Telephone 716 652 2000 Fax 1 716 687 7910 Toll Free 1 800 272 MOOG www moog com industrial 2009 Moog Inc All changes are reserved CDS6386 RevD 500 289 0309 es
6. Unless expressly indicated all trademarks as indicated jaimers see www moog comilliterature disclaimers a a 8 3 5 J amp oO 3 3 5 x 5 E i 3 B g B D 2 F Rog E 3 3 2 z 5 3 5 p g a 2 2 g E E g 2 ite RG 500
7. e purged of built in contamination particles by an adequate flushing of the entire hydraulic circuit prior to mounting the servovalves The servovalve should be replaced with a flushing manifold and the hydraulic circuit powered up under conditions of fluid temperature and fluid velocity which reasonably simulate normal operating conditions New system filters are installed during the flushing process whenever the pressure drop across the filter element becomes excessive The flushing process should turn the fluid in the reservoir over between fifty to one hundred times To maintain a clean hydraulic system the filters must be replaced on a periodic basis It is best to monitor the pressure drop across the filter assembly and replace the filter element when the pressure drop becomes excessive In addition to other filters that are installed in the hydraulic circuit it is recommended that a large capacity low pressure B3 75 filter be installed in the return line This filter will increase the interval between filter element replacement and greatly reduce the system contamination level 4 INSTALLATION The Moog 62 Series Industrial Servovalve may be mounted in any position provided the servovalve pressure control and return ports match respective manifold ports The mounting pattern and port location of the servovalve are shown on Page 4 The servovalve should be mounted with 1 18 x inch long socket head capscrews and lockwashers Torque the sc
8. er element for the 62 300 type servovalve is listed below Note The inlet orifice assemblies two end pieces MUST be removed from each end not pushed or pulled through their bore gt Remove end caps spacer and O Ring per 62 Series Service Manual gt Place a 010 inch shim into the slot of one inlet orifice assembly and against valve body Using a knife blade or similar object pry the opposite inlet orifice assembly out of its bore Now pry the first inlet orifice out of its bore The tubular filter fits onto a taper of the inlet orifice assembly The filter will now come out with either the first or second inlet orifice assembly gt Remove the old filter from the inlet orifice assembly and discard the filter The filter is a depth type filter thus it cannot be cleaned it must be replaced gt Partially install the new clean filter on one of the inlet orifices and insert into the bore Install the filter support into the filter tube Install the other inlet orifice into the bore and make sure the snout of the inlet orifice fit into the inside of the tubular filter gt Reassemble the end caps O Ring and adapter to the valve body per instructions of the 62 Series Service Manual Note Observe the filter through the pressure port and support the filter tube so that it does not bend when tightening the end cap screws Moog 62 Series Operation Instruction RevD 03 09 3 62 SERIES INSTALLATION AND OPERATION INSTRUCTION ELECTRICAL CONNE
9. ilted with contamination 3 Null adjustor adjusted hardover Replace controller 2 Replace inlet orifice filter assemblies Figure 3 3 Readjust null High null bias actuator drifts or hydraulic motor slowly rotates when controller returns to neutral Incorrect null adjustment 2 Filters silted with contamination Readjust null 2 Replace inlet orifice filter assemblies Figure 3 Poor response valve delays in returning to Filters silted with contamination neutral each time controller is returned to neutral Replace inlet orifice filter assemblies Figure 3 Non repeatability valve fails to return to neutral each time controller is returned to neutral Controller not functioning properly Figure 3 Inlet Orifice Filter Assembly one each end of body Bushing Spool Assembly oe 4 a 4 _ Seal Plate ka AE Seal Plate O Ring 8 FILTER ASSEMBLY REPLACEMENT one each end of body a Using a is inch Allen wrench or 7 is inch socket remove the three socket head cap screws or bolts and lockwashers from end plate Remove end plate Remove seal plate and O Ring c Locate inlet orifice filter assembly Do not touch or attempt to remove bushing spool assembly see Figure 3 d Insert edge of blade screwdriver under lip of inlet orifice filter and remove inlet orifice filter assembly and associated O Ring from body e Visually inspect inlet orifice
10. rews to 96 inch pounds Wire the mating electrical connector for desired coil configuration and polarity see 62 Series Servovalve catalog CDL6267 Thread connector to valve 5 MECHANICAL NULL ADJUSTMENT It may be desirable to adjust the servovalve for flow null independent of the other system parameters The mechanical null adjustment permits convenient control function set ups The mechanical null adjustor is a hex socket set screw located behind the the pan head screw in the motor cap see Figure 2 which when adjusted provides control of the spool position to obtain desired flow null NORMAL ADJUSTMENT SHOULD REQUIRE LESS THAN ONE TURN LIMIT NULL SCREW ADJUSTMENT TO LESS THAN TWO TURNS 2 Moog 62 Series Operation Instruction RevD 03 09 Adjustment Procedure a Ensure that zero electrical signal is applied to servovalve by disconnecting electrical power to servovalve b Using a blade screwdriver remove pan head screw to permit adjustment of hex socket set screw c Using a 2 inch long einch Allen wrench adjust set screw to obtain desired flow null NORMAL ADJUSTMENT SHOULD REQUIRE LESS THAN ONE TURN Note Clockwise orientation of set screw produces flow out control port B d After desired flow null has been obtained install pan head screw e Connect electrical power to servovalve Tools and Equipment a Blade screwdriver 3 ie inch Allen wrench Tweezers Ysinch Allen wrench Ie inch socket
11. rque on the armature This torque displaces the flapper between the two nozzles The differential nozzle pressure moves the spool to either the right or left The spool continues to move until the the feedback torque counteracts the electromagnetic torque At this point the armature flapper is returned to the center so the spool stops and remains displaced until the electrical input changes to a new level The actual flow from the valve to the load will depend upon the load pressure DISASSEMBLY MAINTENANCE OR REPAIR OTHER THAN IN ACCORDANCE WITH THE INSTRUCTIONS HEREIN OR OTHER SPECIFIC WRITTEN DIRECTIONS FROM MOOG WILL INVALIDATE MOOG S OBLIGATIONS UNDER ITS WARRANTY MOOG 62 Series Installation and Operation Instruction Electrohydraulic Servovalve ELECTROHYDRAULIC VALVE CUT AWAY Torque Motor Coil Upper Polepiece Armature Flexure Sleeve Nozzle Feedback Wire Spool Inlet Orifice Filter Tube Figure Moog Series 62 Flapper O Plug Electrical Connector 3 HYDRAULIC SYSTEM PREPARATION To prolong servovalve operational life and to reduce hydraulic system maintenance it is recommended that the hydraulic fluid be kept at a cleanliness level of ISO Code 16 13 NAS Class 5 or better The most effective filtration scheme incorporates the use of kidney loop or off line filtration scheme with B 75 filters for maximimum effectiveness Upon system start up the hydraulic system should b
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