Precor EFX5.31 Instruction Manual
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Precor EFX5.31 Instruction Manual

Elliptical fitness crosstrainer
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5.31, 5.33, 5.35, 5.37 Elliptical Fitness Crosstrainer
Warning: This service manual is for use by Precor trained service providers only.
If you are not a Precor Trained Servicer, you must not attempt to service any Precor Product;
Call your dealer for service.
This document contains information required to perform the majority of troubleshooting, and
replacement procedures required to repair and maintain this product.
This document contains general product information, software diagnostic procedures (when
available), preventative maintenance procedures, inspection and adjustment procedures,
troubleshooting procedures, replacement procedures and electrical block and wiring diagrams.
To move directly to a procedure, click the appropriate procedure in the bookmark section to the
left of this page. You may "drag" the separator bar between this page and the bookmark section
to change the size of the page being viewed.
© 2007 Precor Incorporated
Unauthorized Reproduction and Distribution Prohibited By Law
20039-155

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  • Page 1 5.31, 5.33, 5.35, 5.37 Elliptical Fitness Crosstrainer Warning: This service manual is for use by Precor trained service providers only. If you are not a Precor Trained Servicer, you must not attempt to service any Precor Product; Call your dealer for service.

  • Page 2: Section One - Things You Should Know

    Right, Left, Front, and Back Conventions In this manual, right, left, front, and back are from the perspective of a user standing on the EFX5.31, 5.33, 5.35, 5.37 facing the display enclosure. Warning and Caution Statements and General Safety Guidelines Warning statements indicate a particularly dangerous activity.

  • Page 3: General Information

    • Do not use accessory attachments that are not recommended by the manufacturer-such attachments might cause injuries. General Information For the latest exploded view, part number and part pricing information, visit the Precor dealer website at “www.precor.com/connection.

  • Page 4: Required Tools And Equipment

    Required Tools and Equipment The following list is a summary of the tools and equipment required when you service Precor’s EFX. TOOLS EQUIPMENT phillips and flat-head screwdrivers digital multimeter standard and metric allen wrench sets Supplies open-end wrench set blue loctite...

  • Page 5: Procedure 2.1 - Accessing The Hardware Validation Program

    Plug the power cord into the wall outlet, then turn on the EFX with the on/off switch. Note: Use the RESET key and the ten key keypad to enter the access code. With the PRECOR EFX banner displayed, access the diagnostic program by pressing, keys RESET,5,1,7,6,5,7,6,1, sequentially. Diagram 2.1 - 5.37 Display...
  • Page 6 The test name HARDWARE VALIDATION will be displayed. Press the OK key to proceed to the display test. The test name “DISPLAY” will be displayed. Press the OK to enter the display test or an key to proceed to a different test. Each time you press the OK key a different block of LED’s will illuminate.
  • Page 7 20. The incline percentage will be displayed on the left and the A/D (lift calibration) number will be displayed on the right. The lift A/D number indicates the physical position of the incline and is used to calibrate the incline. The A/D number will range from 34 (level 1) to 223 (level 20).

  • Page 8: Procedure 2.2 - Accessing The Diagnostics Test

    Procedure 2.2 - Accessing the Diagnostics Test Procedure Plug the power cord into the wall outlet, then turn on the EFX with the on/off switch. With the PRECOR EFX banner displayed, press keys RESET,6,5, sequentially. Diagnostics Test Odometer Hour meter...
  • Page 9 16. The keys will scroll you through the list of programs that have been used. 17. Press the ENTER key to proceed to the error log display 18. The display name “ERROR LOG” will be displayed press the OK key. 19.

  • Page 10: Procedure 2.3 - Accessing The Set User Parameters Display

    Procedure Plug the power cord into the wall outlet, then turn on the EFX with the on/off switch. With the PRECOR EFX banner displayed, press keys RESET,5,6,7,1, sequentially. On the 5.37 press the OPTIONS key. Diagnostics Test Select Units...
  • Page 11 13. Press the ENTER key to save the currently displayed selection and exit the set cool down time display. 14. The display name “SET CROSSRAMP AUTO-LEVEL” will be displayed, press the OK key to proceed to the set crossramp auto-level display or an key to proceed to a different display.

  • Page 12: Procedure 2.4 - Documenting Software Problems

    The action taken by the user just before the problem occurred. Problem-related information (such as how far into the program the problem occurred, the work level being used when the problem occurred, etc.). • The frequency of occurrence. • Contact precor technical support at 800-347-4404 to receive a return tag.

  • Page 13: Section Three - Preventive Maintenance

    Regular Preventive Maintenance (Owner) Cleanliness of the EFX and its operating environment will keep maintenance problems and service calls to a minimum. Precor recommends that you perform the following preventive maintenance schedule. At the End of Each Day Wipe down the stairarms, ramps, wheels and frame with a damp cloth.
  • Page 14 Procedure Plug the power cord into the wall outlet and set the on/off switch in the “on” position. With the PRECOR EFX banner displayed, press QUICK START. Select Resistance Level 1. Operate the EFX for 4–5 minutes. As you operate the EFX, concentrate on the operating sounds made by the unit.

  • Page 15: Procedure 5.1 - Measuring The Resistance Of An Eddy Current Magnet

    Procedure 5.1 - Measuring the Resistance of an Eddy Current Magnet Caution Remove power from the EFX before you measure magnet resistance. Procedure Set the on/off switch in the “off” position, then unplug the power cord from the wall outlet. WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know.

  • Page 16: Procedure 5.2 - Inspecting And Adjusting Belt Alignment And Tension

    Procedure 5.2 - Inspecting and Adjusting Belt Alignment and Tension Procedure Set the on/off switch in the “off” position, remove the A.C. line cord from the A.C. outlet. WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know.
  • Page 17 13. Belt tension must now be checked and if necessary corrected. Remember, if it is necessary to change belt tension, the belt alignment must be maintained. Diagram 5.3 - Drive Unit Input Belt Adjustment Slot Step Up Belt Input Belt Tension Bolt Input Belt Tensioner...
  • Page 18 Diagram 5.4 - Measuring Belt Tension 15 lbs 1/4” 16. If the locking tabs on the right and left step up belt tension bolts have not been straightened, use pliers to bend the locking tabs out of the way so that the bolts can be turned. IF...
  • Page 19 22. Slide a stout screwdriver blade into the adjustment slot, See Diagram 5.3, to the upper left of the idler pulley. Using the screwdriver as a lever, press the pulley down and to the right. While maintaining constant pressure on pulley, check the belt tension with your finger. When the belt tension feels correct, tighten and torque the input belt tension bolt to 200 inch pounds (17 foot pounds).

  • Page 20: Procedure 5.3 - Calibrating The Lift Motor

    Procedure 5.3 - Calibrating the Lift Motor In order to calibrate the lift motor, it is necessary to disconnect the lift motor from the ramp assembly. Set the on/off switch in the “off” position. Remove the front cover per Procedure 7.21. Remove the two bolts that retain the lift yoke to the ramp assembly.
  • Page 21 Set the on/off switch in the “off” position. Do not exit the diagnostic program in the normal manner. Exiting the diagnostic program may cause the lift to self center and invalidate the lift calibration just performed. Raise the ramp assembly to a convenient height and slide the lift yoke into the ramp assembly.

  • Page 22: Procedure 5.4 - Drive Input Assembly Adjustments

    Procedure 5.4 - Drive Input Assembly Adjustments This procedure ensures that the drive input assembly, the drive belts and the eddy current magnet are correctly adjusted and aligned. All of the checks described in this procedure must be performed to ensure proper operation. Set the on/off switch in the “off”...
  • Page 23 Diagram 5.7 - Pillow block Mounting Bolts Tap Here Loosen Loosen Loosen Do not Loosen Using a rubber mallet, gently tap the top of the pillow block with two loosened bolts (the right hand pillow block in Diagram 5.7) until the two measurements in Diagram 5.6 are within 1/16 inch.
  • Page 24 10. If the difference between the two measurements is greater than 1/16 inch, continue with step 11. If the difference is less than 1/16 inch, skip to “eddy current magnet adjustment”. 11. You will be adjusting one half of the difference between the two measurements with each of the step up pulley adjustment nuts.

  • Page 25: Procedure 6.1 - Troubleshooting The Lower And Upper Data Cable

    Procedure 6.1 - Troubleshooting the Lower and Upper Data Cable Typical symptoms associated with a defective data cable is either an error 30 or no power to the upper PCA. This procedure requires that you have a known good upper data cable, lower data cable and mid-point connector.
  • Page 26 PCA and continue with step 12. 13. If you have performed all of the procedures above and have been unable to correct the problem, call Precor customer service.

  • Page 27: Procedure 6.2 - Troubleshooting The Keypad And Upper Pca

    Procedure 6.2 - Troubleshooting the Keypad and Upper PCA If the function keys on the electronic console are unresponsive, the problem may be either the upper PCA or keypad. Procedure Set the on/off switch in the “off” position. WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One.
  • Page 28 11. If you have performed all of the procedures above and have been unable to correct the problem, call Precor customer service. 12. Access the diagnostics program per procedure 2.1.

  • Page 29: Procedure 6.3 - Troubleshooting The Speed Sensor

    Procedure 6.3 - Troubleshooting the Speed Sensor Circuit Description The speed sensor is a reed switch. A magnet is mounted on the step up pulley. The magnet passes the speed sensor once per revolution. The output from the speed sensor is a 5 Vdc square wave, the frequency of which indicates the operating speed.
  • Page 30 PCA. Replace only one part at a time. If the new part does not correct the problem, replace the original part. If you have performed all of the above tests and the speed sensor is still not functioning, call Precor Technical Support. Check the operation of the EFX as described in Section Four.

  • Page 31: Procedure 6.4 - Troubleshooting The Eddy Current System

    They are the lower PCA and the upper PCA. Replace only one part at a time. If the new part does not correct the problem re-install the original part. If you have performed all of the above tests and there is still no resistance, call Precor Technical Support.
  • Page 32 (∞). If the resistance is significantly low, disconnect the J2 connector from the lower PCA and the eddy current magnet. 11. If you have performed all of the above tests and the resistances are still incorrect, call Precor Technical Support.

  • Page 33: Procedure 6.5 - Upper Display Does Not Illuminate

    If the reading in step 4 is still significantly low, replace the lower PCA If you have performed all of the above tests and are unable to resolve the problem, contact Precor customer support. 10. Plug the line cord into the wall outlet and set the on/off switch in the “on” position.
  • Page 34 15. If the measurement is good, replace the speed sensor. If the measurement is significantly low, replace the data cable. 16. If you have performed all of the above tests and are unable to resolve the problem, contact Precor customer support. Diagram 6.5 - Lower PCA J10 (Data Cable) J8 (Speed Sensor) TP20 (+7.5V)

  • Page 35: Procedure 6.6 - Troubleshooting The Lift System

    If the new part does not correct the problem, replace the original part. If you have performed all of the above tests and the lift system is still not functioning, call Precor Technical Support. Set the on/off switch in the “off” position. Remove the F1 lift fuse (2 amp slow blow) fuse from the lower PCA.
  • Page 36 Replace only one part at a time. If the new part does not correct the problem, replace the original part If you have performed all of the above tests and the lift system is still not functioning, call Precor Technical Support.

  • Page 37: Procedure 7.1 - Replacing Or Removing A Rear Cover Section

    Procedure 7.1 - Replacing or Removing a Rear Cover Section Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed.
  • Page 38 Diagram 7.2 - Rear Cover assembly with the Access Panel Removed Snap Mounting Screw Remove the two screws that fasten the wedge cover to the frame and remove the wedge cover. See Diagram 7.3. Diagram 7.3 - Wedged Cover Wedge Cover Mounting Screw...
  • Page 39 Diagram 7.4 - Bottom and Front Cover Sections Front Cover Snap Mounting Screw Snap Bottom Cover Remove the two screws that fasten the A.C. input module to the bottom cover section. Do not disconnect the wiring from the A.C. input module. Remove the four screws that fasten the bottom cover section to the frame.
  • Page 40 Procedure 7.2 - Replacing a Display Front Panel, Upper PCA, Heart Rate PCA or Metrics PCA Procedure The keyboard is part of the display housing front panel. If the keyboard is not functioning properly, replace the display housing front panel. Removing the Display Housing Front Panel Set the on/off switch in the “off”...
  • Page 41 Removing and replacing the HR PCA 13. Disconnect the HR input and output cables from the HR PCA. See Diagram 6.3. 14. Remove the HR PCA by carefully unsnapping it from its mounts on the display front panel. 15. Position the replacement HR PCA at its mounting location on the display housing front panel and press it into place in its mounts on the display front panel.

  • Page 42: Procedure 7.3 - Replacing A Lower Pca

    Procedure 7.3 - Replacing a Lower PCA Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...
  • Page 43 Procedure 7.4 - Replacing a Lower or Upper Data Cable Procedure Note: Before you install a new data cable, ensure that the data cable is defective. Refer to Procedure 6.1. The upper data cable is connected to the upper PCA at the rear of the display, and is then routed down the left outrigger tube.
  • Page 44 13. Tape the replacement lower data cable to the lower PCA end of the existing data cable. Carefully pull the existing lower data cable out of the hole in the frame, near the near the left outrigger tube, as you feed the replacement data cable into the frame. Stop when the replacement data cable appears out of the hole in the frame near the left outrigger tube.

  • Page 45: Procedure 7.5 - Replacing A Power Entry Module

    Procedure 7.5 - Replacing a Power Entry Module Procedure Note: The power entry module on this EFX is a multifunction unit. It functions as a power entry module, A.C. line fuse holder, on/off switch and A.C.line filter. Set the on/off switch in the off position. Remove the A.C. line cord from the A.C. outlet and from the power entry module.
  • Page 46 Set the replacement power entry module at it’s mounting position, secure the power entry module with the screws removed in step 4, torque the screws to 6-9 inch pounds. Replace the wires removed in step 3. Connect the blue wire to terminal D, the brown wire to terminal A and the green wire to the ground terminal of the power entry module.

  • Page 47: Procedure 7.6 - Replacing A Crankarm Assembly

    Procedure 7.6 - Replacing a Crankarm Assembly Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...
  • Page 48 Clean the crankarm mounting bolt threads and the input pulley shaft threads with an alcohol swab. Allow them to dry and apply blue loctite to the crankarm mounting bolt threads. Position the crankarm on the input pulley shaft. Thread and hand tighten the crankarm mounting bolt into the input pulley shaft.

  • Page 49: Procedure 7.7 - Replacing A Pillow Block Bearing

    Procedure 7.7 - Replacing a Pillow Block Bearing Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the off position, then unplug the power cord from the A.C.
  • Page 50 12. Replace the crankarm(s) per Procedure 7.6. Diagram 7.7 - Pillow Block Bearings Mounting Bolt Stamping Pillow Block Bearing 13. Replace the stairarms per Procedure 7.17. 14. Check drive input adjustment per Procedure 5.4. 15. Replace the access panel, top, left and right cover sections per Procedure 7.1. 16.
  • Page 51 Procedure 7.8 - Replacing an Input Drive Assembly Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Note: The input drive assembly consists of the input pulley assembly and eddy current disk assembly.
  • Page 52 Slide the step up and input belts onto the replacement input drive assembly as you set the input drive assembly in it’s mounting position in the EFX. Thread and hand tighten the pillow block mounting bolts into the drive weldment upright. Torque the pillow block mounting bolts to 120 inch pounds (10 foot pounds) starting with the bottom left hand bolt, then the bottom right hand bolt, the upper right hand bolt and then the upper left hand bolt.

  • Page 53: Procedure 7.9 - Replacing An Input Pulley Belt

    Procedure 7.9 - Replacing an Input Pulley Belt Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...
  • Page 54 Remove the input pulley belt and place the replacement input pulley belt in it’s place on the step up pulley assembly. 10. Set the step up pulley assembly with the step up and input belt at its mounting position in the drive unit.

  • Page 55: Procedure 7.10 - Replacing A Step-Up Pulley Belt

    Procedure 7.10 - Replacing a Step-Up Pulley Belt Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...
  • Page 56 14. Tighten the right and left hand step up belt tension bolts and the idler pulley mounting bolt to the settings marked in step 5. 15. Verify the tension of the belts per Procedure 5.2. 16. Replace the crankarm(s) per Procedure 7.6 17.

  • Page 57: Procedure 7.11 - Replacing A Step-Up Pulley Assembly

    Procedure 7.11 - Replacing a Step-Up Pulley Assembly Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...
  • Page 58 15. Tighten the right and left hand step up belt tension bolts and the idler pulley mounting bolt to the settings marked in step 5. 16. Verify the tension of the belts per Procedure 5.2 17. Torque the step up pulley axle nuts to 480 inch pounds (40 foot pounds) 18.

  • Page 59: Procedure 7.12 - Replacing A Speed Sensor Assembly

    Procedure 7.12 - Replacing a Speed Sensor Assembly Procedure Set the on/off switch in the “off” position, then unplug the power cord from the wall outlet. WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know.

  • Page 60: Procedure 7.13 - Replacing An Eddy Current Magnet Assem- Bly

    Procedure 7.13 - Replacing an Eddy Current Magnet Assem- Procedure Set the on/off switch in the “off” position, then unplug the power cord from the wall outlet. WARNING Before continuing with this procedure, review the Warning and Caution statements listed in Section One, Things You Should Know.

  • Page 61: Procedure 7.14 - Replacing A Stairarm Pivot Block

    Procedure 7.14 - Replacing a Stairarm Pivot Block Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...
  • Page 62 Slide the stairarm pivot block onto the crankarm pin and replace the wave washer, flat washer and retaining ring removed in step 6. Slide the stairarm onto the stairarm pivot block. Ensure that the red spacer is on the top and the clear spacer is on the bottom of the pivot block as shown in Diagram 7.11.

  • Page 63: Procedure 7.15 - Replacing A Wheel Assembly

    Procedure 7.15 - Replacing a Wheel Assembly Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...
  • Page 64 Roll the stairarm into the ramp channel from the rear of the ramp. Slide the stairarm pivot block onto the crankarm pin and replace the wave washer, flat washer and retaining ring removed in step 3. Replace the left, right, top and access panel cover sections per Procedure 7.1. 10.

  • Page 65: Procedure 7.16 - Replacing A Stairarm Pedal

    Remove the two strips of double sided tape and replace them with two new strips of double sided foam tape, Precor part number 39874-101. Diagram 7.13 - Stairarm Pedal, Viewed from the Bottom of the Stairarm...

  • Page 66: Procedure 7.17 - Replacing A Stairarm

    Procedure 7.17 - Replacing a Stairarm Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...

  • Page 67: Procedure 7.18 - Replacing A Ramp Assembly

    Procedure 7.18 - Replacing a Ramp Assembly Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Set the on/off switch in the “on”...
  • Page 68 Diagram 7.15 - Upper Ramp Mounting Upper Ramp Mounting Bolts Replace both stairarms per Procedure 7.12. 10. Replace the left, right, top and access panel cover sections per Procedure 7.1. 11. Check EFX operation per Section 4.

  • Page 69: Procedure 7.19 - Replacing A Moveable Handlebar

    Procedure 7.19 - Replacing a Moveable Handlebar Set the on/off switch in the “off” position, then unplug the power cord from the wall outlet. Remove the bolt that fasten the forward end of the connecting link to the moveable handlebar. See Diagram 7.16 Diagram 7.16 - Moveable Handlebar, Lower End Connecting Link Moveable...
  • Page 70 Remove the outrigger tube per Procedure 7.22. Using a 1/2 inch wrench the moveable handlebar’s axle, unscrew and remove the moveable handlebar. See Diagram 7.18. Diagram 7.18 - Moveable Handlebar Moveable Handlebar Axle Set the replacement moveable handlebar in its mounting position. Carefully start hand threading the moveable handlebar to avoid cross threading and then tighten..

  • Page 71: Procedure 7.20 - Replacing A Idler Pulley

    Procedure 7.20 - Replacing a Idler Pulley Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Set the on/off switch in the “off”...

  • Page 72: Procedure 7.21 - Replacing A Front Cover Section

    Procedure 7.21 - Replacing a Front Cover Section Set the on/off switch in the “off” position, then unplug the power cord from the wall outlet. It is only necessary to perform as much of this procedure as is required to access the cover being replaced.
  • Page 73 The lower rear cover must be removed before the upper rear cover. Plug the power cord in the A.C. outlet and set the on/off switch in the “on” position. Lower the incline to its lowest position. Remove the two screws in the upper portion of the lower rear cover. Slide the rear cover rearward and off of the EFX.

  • Page 74: Procedure 7.22 - Replacing An Outrigger Tube

    Procedure 7.22 - Replacing an Outrigger Tube Set the on/off switch in the “off” position, then unplug the power cord from the wall outlet. Remove the display bracket cover from the rear of the display. Carefully, lift the front of the EFX and place it on a temporary support, such as a block of wood.
  • Page 75 If you are removing the right hand outrigger tube, skip to step 10. If you are removing the left hand outrigger tube, continue with step 7. Disconnect the data cable from the upper printed circuit board. If applicable, disconnect the heart rate cables.

  • Page 76: Procedure 7.23 - Replacing A Ramp Mounting Bracket

    Procedure 7.23 - Replacing a Ramp Mounting Bracket Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch points exist between the stairarm and ramp and between the stairarm and crankarm, when the rear covers are removed. Procedure Raise the incline to its maximum position.

  • Page 77: Procedure 7.24 - Replacing A Power Entry Module Fuse

    Procedure 7.24 - Replacing a Power Entry Module Fuse Procedure Set the on/off switch in the off position. Remove the A.C. line cord from the A.C. outlet and from the power entry module. Using a thin bladed screwdriver, carefully pry the fuse access door open. Using a thin bladed screwdriver, carefully pry the fuse module out of the power entry module.

  • Page 78: Procedure 7.26 - Replacing A Lift Motor

    Procedure 7.26 - Replacing a Lift Motor Set the on/off switch in the “off” position. Remove the A.C. line cord from the A.C. outlet. Remove the upper and lower front covers per Procedure 7.21. Remove the bolts that fasten the upper end of the ramp to the lift motor yoke. See Diagram 7.15.
  • Page 79 Thread the lift motor yoke onto the replacement lift motor. Set the replacement lift motor in its mounting position and secure it with the nut and bolt removed in step 7, torque the bolt to 60 inch pounds. 10. Reconnect the lift motor cable connector. Fasten the frame ground connector to the frame with the screw removed in step 6, torque the frame ground screw to 90 inch pounds.

  • Page 80: Procedure 7.27 - Replacing The Prom

    Procedure 7.27 - Replacing the PROM The PROM and the associated printed circuit assembly (PCA) are static sensitive. Anti- static devices must be used and all anti-static precautions must be followed during this procedure. Remove the printed circuit assembly per its associated procedure. The prom is a forty-four pin square package (PLCC44).

  • Page 81: Procedure 7.28 - Incline Yoke Replacement

    Procedure 7.28 - Incline Yoke Replacement Plug the EFX’s A.C power cord into an A.C. outlet and set the on/off switch in the “on” posi- tion. Raise the incline to its highest position (level 20). Set the on/off switch in the “off” position and remove the EFX’s A.C. power cord from the A.C.
  • Page 82 Diagram 7.30 - Removing the Yoke from the Ramp Note the orientation of the incline yoke, the replacement yoke must be installed in the same orientation. If the replacement yoke is installed upside down the incline will go too low and damage the cover.
  • Page 83 12. Raise the ramp and slide the yoke into the ramp. Secure the yoke with the hardware removed in step 6. 13. Replace the front cover per Procedure 7.21. Thoroughly, test all EFX functions paying special attention to all incline functions.

  • Page 84: Wiring Diagram 8.1 - 5.31, 5.33, 5.35, 5.37 Efx

    Wiring Diagram 8.1 - 5.31, 5.33, 5.35, 5.37 EFX J4-1 J4-2 J4-3 J6-1 J6-2 J6-3 J8-1 J1-2 J1-1 J8-2...
  • Page 85 Block Diagram 8.2 - 5.31, 5.33, 5.35, 5.37...

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Efx5.37Efx5.33Efx5.35

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