GOV SM 3-15: GOV10/50 Service Manual
Contents
1. 11 7 0 INSTALL UPDATED PCB S USING 881001 KT 14 8 0 GOV PRESSURE SENSOR TROUBLESHOOTING 17 9 0 GOV 10 50 FIELD APPLICATIONS 18 10 0 BUMPER LOCATIONS FOR GOV 0 ccccceeeeeseeeeeeeeeeeeeeeeeeeeeeeeeeneneeeeseseeees 19 GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions 1 0 GOV SERVICE AND REPAIR MANUAL OVERVIEW The GOV10 50 Gas Engine Governor has been designed to provide reliable oper ation with a minimum amount of maintenance To ensure optimum performance periodic inspection and cleaning Is necessary Preventative maintenance issues can be integrated into the current maintenance schedule of the engine Most maintenance requires little effort and no downtime of the GOV valve Corrective maintenance is to be done when the GOV Gas Engine Governor begins to behave erratically Procedures have been generated to cover most minor issues EXTERNAL VISUAL INSPECTION Inspect the exterior of the Governor for loose connections frayed wires or major structural damage CLEANING Exterior cleaning will aid in the visual inspection of the external casing and en Sure good connections Ethyl alcohol or mild soapy water can be used as clean ing agents MAINTENANCE LOG To facilitate troubleshooting and to establish service schedules a mainte2. CAUTION Due to the strong nature of the shutoff spring within the center section DO NOT place your fingers near the poppet valve if it is in an open position E With asmall pry tool remove the transducer 3a from its housing F There is an O ring 3b placed on the underside of the transducer 3a If this O ring 3b is damaged it must be replaced Insert the new transducer 3a into the appropriate position taking care to have the O ring 3b in place within the cavity Use the O ring lubricant 3e to help hold the O ring 3b in place Re insert the snap ring 3c to hold the transducer in place Using a paper clip to hold open the spring clip insert the three wires coming from the pressure sensor into the plastic connector in proper order as shown in Fig 2 If the differential pressure transducer 4a requires replacement remove it by removing the four mounting screws 4b After the screws are removed the differ ential pressure transducer 4a can be lifted straight up from the control housing There are two small connecting tubes in the control housing when replacing the transducer 4a be sure to carefully align these before pressing down on the new differential pressure transducer 4a to install it The differential pressure transducer 4a connects to the PCB assembly la through a plastic connector as detailed in Fig 2 Using a paper clip to hold open the spring clip insert the four wires coming fr
3. SERIAL NO eas CIRCUITS ARE LIVE OPEN CIRCUITS E NOTE WIRING MUST BE BEFORE REMOVING COVER J gltronic RECIP ENGINE GOVERNOR CONNECTEO WITH ACONDUN ee ene peda CLASS DO NOT DISCONNECT EQUIPMENT j JIV 1 REQUIREMENTS UNLESS POWER HAS BEEN eee Te ae SWITCHED OFF OR AREAIS KNOWN ALTRONIC INC NAT GAS 1000 BTU SCF TO BE NON HAZARDOUS MAXIMUM PRESSURE AN WARNING GIRARD OHIO 500 PSIG SP e os SUBSTITUTION OF COMPONENTS GROUP D T4 MAY IMPAIR SUITABILITY FOR SPEED SETPOINT 40 C to 85 C CLASS DIV 1 OR 2 REQUIREMENTS 4mA MIN RPM 20mA MAX RPM NOTE CLASS I DIV 2 RATING REFER TO INSTALLATION S MS NSTRUCTIONS FORM GOV OM ELECTRICAL POWER APPLIES WHEN USING MS 1 24 VDC 1 0 AMP CONNECTOR OPTION 893003 Allen Head Screws GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions C Remove the old PCB assembly by removing the six Phillips head screws which secure it to the control housing base With the PCB assembly loose unplug the four 12 position terminal plugs from the underside of the old PCB assembly a Mounting Screws CTE a We a gt TE zi i d S eee eee rer run hh Cana D Locate the three wires connecting the PCB assembly to the old power Supply assembly colored solid orange solid purple and solid blue Re move these wires from the terminal plug they connect to To remove these wires insert a large sized paper clip into the hole abo
4. REFERENCE POINTS FOR WIRING CHART GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions 7 0 INSTALL UPDATED PRINTED CIRCUIT BOARD ASSEMBLIES USING 881001 KT Taal Retrofit installation of new PCB assembly la MUST include the replacement of the obsolete TCA 100 display module by the new GOV Display Module P N 891002 1 72 Retain all removed parts in a small plastic bag These parts should be returned to Altronic Inc for exchange credit NOTE When updating GOV10 units with S N 852 or lower the three obsolete pressure transducers 3a MUST be replaced The obsolete pressure transducers are identified 7 3 The following tools are required for the removal and installation of the PCB assembly 3 16 Allen wrench 1 4 nut driver or wrench Phillips head screw driver large sized paper clip a screw holding screwdriver 7 4 Removing the older style PCB assembly by the presence of four wires rather than three The obsolete transducers A Disconnect the power from the GOV system After power is off disconnect have a white wire in addition to the all field wiring at junction box normal black red and green wires currently used See Section 5 B Remove cover from GOV housing by removing the twelve Allen head cap screws 6 which secure it to the main body GAS ENGINE GOVERNOR MODEL GOV MC 150143 cassis CAUTION P N GROUP D T4 WARNING 40 C to 85 C KEEP COVER TIGHT WHILE
5. the regulator assembly 5 using the spanner wrench 2a in con junction with a torque wrench set for 30 Ib ft of torque M If the end flange was removed place a small amount of O ring lube 2c on the flange O ring 2j and re install GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions 4 0 REMOVAL OF THE POPPET VALVE ASSEMBLY refer to fig 1b on page 6 4 1 The following will cover the removal of the poppet valve assembly 7 from the GOV10 Gas Engine Governor The poppet valve assembly should not be removed WARNING Use eye protection as the from the GOV50 Since the GOV10 center section is not serviceable in the field snap ring can release out of the as a replacement assembly must be installed if on site repairs are desired If the sembly unexpectedly poppet valve assembly 7 is removed for inspection or replacement the O rings 2f may be damaged The required O rings 2f are included in the Valve Repair Kit 2 The replacement poppet valve assembly 7 is sold separately For the GOV50 only contact the factory with the model number and serial number of the GOV50 if the poppet valve assembly requires service A Remove the GOV1O valve from the fuel line B Remove the outlet flange 9 being careful not to cut the flange O ring 2 If needed tap the flange upward with a rubber mallet to ease removal C Using a pair of snap ring pliers remove the steel snap ring 11
6. D Using the soft rubber coated side of the snap ring pliers pry out the orifice metering plate 12 Do not damage the inner edge in any way E Remove the inlet flange 8 being careful not to cut the O ring 2j Again tap the flange with a rubber hammer to ease removal F Puta 2 diameter PVC pipe over the downstream portion of the center sec tion Using a rubber mallet tap the PVC pipe until the center section is removed from the housing Do not press or turn the poppet itself G Coat the three O rings 2f of the new center section with O ring lubricant 2c H Insert the poppet assembly 7 into the valve body with the cone facing in the upstream direction NOTE The cone of the assembly which does not have a cap screw Align the control pressure inlet of the poppet assembly with the dowel insert of the control pressure transducer lines up with the control pressure inlet of the assembly J Click the center section in place by providing sufficient downward force on the center section cone In the field this can be done by CAREFULLY stand ing on the cone portion of the center section when it is oriented vertically K Replace the inlet flange 8 it has two ridges Tighten down the 7 cap screws 10 to 6 Ib ft torque each L Apply O ring lubricant 2c to the orifice O ring 2f Firmly press the orifice plate 12 into the valve body at the outlet end Ensure that the taper faces the downstream side of
7. L HOUSING CONNECTOR 1 Or CZ OC ex 17 GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions 2 0 PARTS IDENTIFICATION 2 1 PARTS LIST GOV1O Reference exploded view at left ITEM NO 20 207 2e 2i 2g 2h 2i al 2k 3 3a 3b oc 3d 3e 4 4a Ab Ac 5 6 7 PART N0 DESCRIPTION 881001 IKT or TEN 881001 2KT PCB Field Retrofit Kit 872002 1 or 872002 2 PCB Assembly Logic PCB Assembly Terminal Label Terminal Board Standoff Standoff Standoff Bumper Adhesive backed Valve Repair Kit Wrench Servo Filter O ring O ring O ring Pressure Transducer Kit Pressure Transducer Spacer req d on some housings O ring Lube dP Transducer Kit dP Transducer Assembly Regulator Assembly GOVIO Bolt 1 4 20 x 1 5 Flapper Shield This item appears in figure 1B on page 6 This item appears in figure 1A on page 4 and 1B on page 6 GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions FIG 1B PART IDENTIFICATION METERING HOUSING CER Oh P GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions 2 2 PARTS LIST GOVIO Reference exploded view at left ITEM NO QUANTITY PART NO DESCRIPTION 2 820002 Valve Repair Kit 2a 816000 Wrench 2b 810059 Servo Filter 2c 803020 O ring Lube 2d 810027 O ring 2e 810031 O r
8. ON P N SERIAL NO CIRCUITS ARE LIVE OPEN CIRCUITS It ni NOTE WIRING MUST BE BEFORE REMOVING COVER ro CONNECTED WITH CONDUIT f RECIP ENGINE GOVERNOR coMPLYING WITH CLASS DO NOT DISCONNECT EQUIPMENT i DIV 1 REQUIREMENTS UNLESS POWER HAS BEEN FUEL TYPE SWITCHED OFF OR AREA IS KNOWN DRY NAT GAS 1000 BTU SCF TO BE NON HAZARDOUS ALTRONIC INC gt 4 Se C MAXIMUM PRESSURE apg Le aa WARNING GIRARD OHIO 500 PSIG SP AL 2 SUBSTITUTION OF COMPONENTS GROUP D T4 MAY IMPAIR SUITABILITY FOR SPEED SETPOINT 40 C to 85 C CLASS DIV 1 OR 2 REQUIREMENTS 4mA MIN RPM 20mA MAX RPM NOTE CLASS I DIV 2 RATING REFER TO INSTALLATION lt INSTRUCTIONS FORM GOV OM ELECTRICAL POWER APPLIES WHEN USING MS 24 VDC 1 0 AMP CONNECTOR OPTION 893003 8 0 GOV PRESSURE SENSOR TROUBLESHOOTING 8 1 The FMP FSP and FCP transducers are all the same part number and are interchangeable If a transducer is suspected to be bad the transducer output voltage can be measured with a digital voltmeter The RED and BLACK wires are a 1Ovdc power source and the GREEN wire is the sensor output sensor output voltage is measured on GREEN with respect to BLACK The trans ducer output is O 2 5 volts from O to 260psi Since this is an absolute pressure transducer it is normal for the unit to have a positive voltage output at Opsig typically 0 10 O 15Vdc Fig 2 on page 13 shows a pinout for the connectors for use in measuring and v
9. Re lubricate the O ring seals 2f of the poppet assembly 7 and reinstall as instructed REPLACEMENT OF THE PRESSURE TRANSDUCERS Replacement of the three single point GOV pressure transducers 3a can be performed in the field under the direction of the distributor or Altronic person nel The three transducers 3a are identical One transducer kit 3 contains all necessary parts to change one transducer If changing all three three kits are required The three transducers are identified on Fig 2 on page 13 as M Control pressure transducer Ref point P3 on Fig 2 M Outlet pressure transducer Ref point P4 on Fig 2 M Supply pressure transducer Ref point P2 on Fig 2 By replacing a transducer 3a in the field accuracy of the GOV FLOW measure ment may be slightly affected due to the small variances in the transducers To replace a transducer 3a use the following procedure refer to fig la on page 4 A Remove the electronics housing cover by removing 12 bolts 6 B Examine and make notes of the GOV electronic board assembly la which show the wire routing and orientations C Unclip the affected transducer 3a from the electronics board la and unscrew the board la from the circuitry housing Do not remove more wires than necessary D Using snap ring pliers remove the snap ring 3c of the affected transducer 3a GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions
10. Service Manual GOV 10 50 Gas Engine Governor Form GOV SM 3 15 altronic HOERBIGER Engine Solutions ESC r tea op altronic HOERBIGER Engine Solutions G OV 1 0 S FE RI ES G 0V50 S RI ES This document comprises a general overview of the products described herein It is solely for informational purposes and does not represent GOV10EP 10 GOV50EP 10 S GOV10EP 10A GOV50EP 10A e GOV10EP 11 GOVSOEP 11 GOVIOEP 11A GOV5OEP 11A GOV10EP 20 NOTE Please refer to Service Bulletin GOV10EP 20A 518 for details to dP transducer changes and PCB part numbers GOV1OEP 21 required for GOV10 above S N 2500 and GOV50 above S N 1200 GOV1IOEP 21A IMPORTANT SAFETY NOTICE Proper installation maintenance repair and operation of this equipment is essential The recommended practices contained herein should be followed without deviation An improperly installed or operating governor system could cause personal injury to operators or other nearby personnel TABLE OF CONTENTS SECTION TERM PAGE 1 0 GOV SERVICE AND REPAIR MANUAL OVERVIEW 3 2 0 PARTS IDEN AI 9 3 0 CLEANING OR REPLACEMENT OF PILOT FILTER 8 4 0 REMOVAL OF THE POPPET VALVE ASSEMBLY 10 9 0 REMOVAL OF DEBRIS FROM THE METERING HOUSING aaassssnnnnnnnnnnnnnnnnnnnnnn 11 6 0 REPLACEMENT OF THE PRESSURE TRANSDUCERS
11. are 1 215 long The male end of these standoffs goes through the terminal PCB 1b and screws into the two smaller standoffs 1d in the cavity where the old power supply board was removed Reconnect the field wiring from the junction box to the terminal strip on the ter minal PCB assembly 1b See the attached wiring table and the GOV Operating Manual for details J After wiring is verified secure the terminal board label 1c with the screws 1h provided in the kit Field Wiring New PCB Configuration K Insert the ribbon cable connector from the terminal board 1b into the header on the bottom of the new logic board la Plug the two remaining original 12 posi tion plugs into the corresponding headers on the new logic board la These plugs and headers are keyed and will only fit together properly with their assigned mating part GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions L Dress the wires appropriately taking care to not stress any connections or wires ie Ji am Fly en etna a GOV with new PCB assembly M Mount the new logic PCB assembly la to the standoffs using the screws 1g provided in the kit Install and tighten all six screws N Replace cover and secure with the original twelve Allen head screws 6 GAS ENGINE GOVERNOR CLASS 1 DIV 1 GROUP D T4 WARNING 40 C to 85 C KEEP COVER TIGHT WHILE MODEL GOV MC 150143 CAUTI
12. erifying the stability of these voltages Be sure to zero the transducers using the display menu under Sensor Configuration as well as using the AutoZero function when V2 0 firmware is being used Please refer to section 16 0 of the GOV Operating Manual FORM GOV OM 04 06 for details on AutoZero AZ functions GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 9 0 GOV 10 50 FIELD APPLICATIONS Si GOV10 50 Gas Engine Governors have proven their reliability and service on Cooper Clark Ingersoll Rand and other integral compressor engines In recent years many GOVs have been applied to a number of fuel admitted engines in field compression applications including a number of Superior models These latter applications are more difficult because they are often subject to higher vibration and temperatures levels as well as liquids and corrosives resident in the fuel gas Operational problems encountered are sometimes seen as a pres Sure sensor offset or error fuel supply control or manifold pressure In areas of vibration and the normal outdoor environment which is vented into the unit the control housing has a flameproof vent to atmosphere and is certified for explosion proof enclosures a condition known as thin film resistance can occur on the pins of the plug in the PCB connector This resistance acts as an insulator to the low voltage and low current sensor signals and is seen in op eration as an error in the reported pres
13. ing 2f 810042 O ring 2g 810047 O ring 2h 810050 O ring 2i 810051 O ring 2 810052 O ring 2k 810082 O ring 880002 Poppet Valve Assembly NOTE Part numbers for items 7 12 3 eee 2 Flange Inlet 4 bolt flange apply to GOVIO series only Contact 50106039 2 Flange Inlet 8 bolt flange Sore for information for the GOV50 50106079 1 Flange Outlet 4 bolt flange 50106039 1 Flange Outlet 8 bolt flange p ee Bolt 3 8 16 x 1 75 4 bolt flange 801082 Bolt 3 8 16 x 0 75 8 bolt flange 11 801030 Snap Ring 12 50106029 Metering Orifice This item appears in figure 1A on page 4 This item appears in figure 1A on page 4 and 1B on page 6 WO GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 3 0 CLEANING OR REPLACEMENT OF PILOT FILTER 3 1 The following section covers the replacement or cleaning of the pilot filter 2b Before starting it is recommended that a clean flat work surface be prepared and the proper tools be made available Refer to section 2 for required parts It is also recommended that the Valve Repair Kit P N 820002 Item 2 be purchased which contains all of the required items such as a spanner wrench replacement O rings replacement filter and O ring lube See Fig 1A on page 4 for location of parts See the photo below for details A Using the spanner wrench 2a apply pressure in a counter clockwise mo tion and remove the regulator assembly 5 DO NOT remove the
14. nance log should be kept on the Governor CALIBRATION Flow calibration of the GOV is performed in a controlled environment before ship ment Since calibration of the Governor requires equipment not normally avail able in the field it is recommended that the device be returned to the Altronic distributor serving your area PILOT GAS FILTER The internal pilot gas filter if installed should be changed every six 6 months or more frequently if necessary Throughout this service manual service parts will be identified by the item num ber assigned in the parts list in section 2 0 For example la and its position inside the GOV device can be found by locating that item number on Fig 1A on page 4 or 1B on page 6 and identified in section 2 1 or 2 2 GOV UPDATES M In addition to the standard procedures older GOV1O units below S N 852 or GOV50 units below S N 244 will require some items such as the pressure transducers to be changed These items and procedures are identified by specific notes When Updating Units below S N 852 within the appropriate sections of the manual M In addition to the repair of malfunctioning units instructions are given in SECTION 7 which describe the process of updating an older GOV to the current configuration of PCB assembly GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions FIG 1A PART IDENTIFICATION COVER CONNECTOR 2 CONTRO
15. om the differential pressure sensor 4a into the plastic connector In proper order as shown In Fig 2 for Reference point P6 Attach the wiring to the electronics board la in the proper orientation NOTE The red wire of the harness Is on the downstream side of the Governor valve see the flow label Re assemble the electronics board 1a to the electronics housing Install the electronics cover to the GOV Do NOT allow any wires to become pinched when replacing the cover Re tighten the cap screws 6 to 40 in lb torque Maximum clearance between the cover and the housing is 0 0015 GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions NOTE When updating GOV units with a serial number below S N 852 the use of a spacer 3d Is required to hold the transducer in place with snap ring 3c Spacer 3d is in stalled on top of the transducer 3a prior to the installation of the snap ring 3c to effectively raise the height of the transducer to match the height of the older transducer housing altronic HOERBIGER Engine Solutions FIG 2 WIRING DIAGRAM FOR REPLACEMENT TRANSDUCERS CONNECTOR WIRING PIN 1 PIN 12 PIN 1 PIN 12 meme n CONNECTOR 1 CONNECTOR 2 6 PI WHITE 6 P2 GREEN FSP 8 PS BLACK 2 8 P2 BLAK 9 NMC 9 P6 BLAK Legacy dP transducers have a BLUE wire and new dP transducers have a YELLOW wire G SSSSSSSSSSS
16. regulator adjustment screw and nut If these are re moved the correct regulator settings 42 psid cannot be reset without returning the Governor for re calibration Check to see that the regulator does not interfere with the end flanges If there is no interference continue to step E If there is interference the inlet flanges need to be removed step D Using a 5 16 Allen wrench remove the 7 cap screws 10 holding the inlet flange 8 to the main body Remove the flange 8 The filter O ring 2k and filter 2b should now be visible Carefully remove the O ring 2k for later use Inspect the O ring for cuts and abrasions before reuse If there is any physical damage to the O ring It must be replaced GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions altronic HOERBIGER Engine Solutions G If you have a replacement filter 2b and do NOT want to reuse the current filter puncture the filter with a sharp object and remove it Continue to step J H If the filter 2b is to be reused use a dental pick to carefully ease the filter out by its edges Backflush the filter 2b with stoddard solvent or other cleaner J Place the new or cleaned filter 2b into the housing filter cavity coarse side down K Place the O ring 2k in front of the filter to fasten it When replacing or reusing an O ring the proper lubricant 2c should be used at all times L Tighten
17. sure To improve the operation of these connections a liquid solution known as Stabilant 22 has made a remarkable improvement where these issues have been reported Stabilant 22 has been used in the aerospace automotive and computer industry for many years and has been used on many sensor applications similar to those used in the GOV Typically this product is used as Stabilant 22A which is 4 5 isopropyl alcohol allowing it to penetrate the connector and evaporate leaving behind the con nection enhancer Any GOV which exhibits these issues can be easily improved by applying this product to these connectors For more information on Stabilant 22 go to www stabilant com This product can be purchased In a 15mL bottle enough for hundreds of connectors by ordering it at your local NAPA or auto parts store that sells Standard Motor Products Niehoff The NAPA Echlin part number is CE 1 and the Standard Motor Products part number is SL 5 Both retail for about 60 This product may have other applications where intermit tent connectors have caused havoc in control and sensor systems GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions 10 0 BUMPER LOCATIONS FOR GOV 10 1 There is one bumper on the bottom of the PCB Stabilant is added to both halves of the white connectors There are four bumpers inside the lid Two of these align with the connectors If the lid is flipped the other two b
18. the Governor valve GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 9 0 5 1 6 0 6 1 M Replace the snap ring 11 N Replace the outlet flange 9 Tighten down the 7 cap screws 10 to 6 Ib ft torque each O Return the malfunctioning poppet valve assembly 7 to Altronic for repair REMOVAL OF DEBRIS FROM THE METERING HOUSING Occasionally some form of foreign debris will get into the metering housing and become lodged inside This will cause the GOV to malfunction In such ways as failure to shut off leakage and incorrect transducer readings affecting governor accuracy Any debris should be removed by using compressed air A Upon the removal of the poppet assembly 7 from the metering housing of the GOV inspect the housing for any internal damage that may have occurred B Shop air can be used to blow away and clean any loose particles that may have accumulated DO NOT use any hard edged instrument to clean the valve housing C Holding the center section in hand apply instrument air to the poppet as sembly through the control pressure port PC D The poppet valve will open with 30 to 70 psi air applied Do not exceed this range E Using a soft edged device i e popsicle stick Q Tip etc hold open the poppet valve Do NOT use any hard edged instruments i e screwdrivers as this will damage the assembly F Ensuring that the poppet assembly is clear of debris release the poppet valve G
19. umpers align with the connectors T F Eoo y T a UM a fe a a Ae BB nS GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions
20. ve each wire Slip these three wires out of the tied wire bundles These wires will not be used with the new PCB assembly Terminal Plugs Standoffs Long Standoff Power Supply Field Wiring GOV SM 3 15 All rights reserved ALTRONIC LLC 2015 altronic HOERBIGER Engine Solutions E Remove the two standoffs next to the power supply Remove the four small cap screws which hold the power supply to the valve housing At this point the power supply PCB and field wiring can be removed from the unit To remove these items pull the wiring back through the conduit opening Bag these parts The remaining two terminal plugs will be used to connect to the new PCB assembly 1a F Remove the remaining four standoffs and bag these parts All of the stand offs will be replaced by new parts supplied with the PCB replacement kit P N 881001 KT 1 G To install the new PCB assembly la replace the older standoffs which were removed with the new standoffs supplied in 881001 KT 1 These standoffs are not the same length as the older parts Install the 1 25 length standoff 1f from the kit where shown Install five of the short 0 25 length standoffs 1d into the remaining standoff locations H Place the terminal PCB assembly 1b into the cavity where the power supply was removed with the ribbon cable oriented as shown Secure the terminal PCB assembly 1b to the unit as shown with the two medium length standoffs le which
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