Wheel Truck Replacement

About

This procedure provides instruction to remove and install the wheel truck assembly and wheels.

Specifications

System Component Specification
Wheel Truck Assy Fastener 300 +/- 90 in-lbs (34 +/- 10 Nm)
Wheel Truck Assy - Wheel Fastener 300 +/- 90 in-lbs (34 +/- 10 Nm)

Procedure

Removal Instructions

Repeat this procedure for both the right and left wheel truck replacement.

  1. Access the service menu diagnostic CrossRamp Test and set the incline level to 1 (default level)
    1. P10, P30, P30i and P31: (Service menu (51765761) > MACHINE TEST > CROSSRAMP TEST and raise the INCLINE LEVEL to 1).
    2. P62, P80, and P82: (Service menu (51765761) > System Settings > System Tests > CrossRamp Test and raise the INCLINE level to 1).
  1. Disconnect either the battery negative terminal or the Lift Motor input power/control cable.

WARNING:  Make sure to disconnect either the negative battery terminal or the Lift Motor input power/control cable to prevent accidental ramp movement. This unexpected action could cause personal injury.

  1. Remove the Stairarm wheel truck assemble from the ramp track and lay the Stairarm on the floor. To remove, grasp the bottom of the wheel truck assembly and lift up and outward to remove from the track. No tools or fastener removal is required. It may help to lift the outer edge of the CrossRamp cover while removing.

  2. Then position the Stairarm wheel truck at approximately the 10 o'clock position behind the input drive housing by lifting the Stairarm wheel truck upward and rearward until it rests behind the input drive housing. This positioning of the Stairarm will provide access to the wheel truck assembly fasteners.
  3. Remove the 9/16” Nylock mounting bolt , the wheel truck assembly , and spindle sleeve from the Stairarm Spindle . Discard the 9/16” Nylock mounting bolt . Retain the spindle sleeve for installation.

    4. Wheel Removal

    Do this step only if you need to remove the wheels from the wheel truck assembly.

  4. Remove the 9/16” bolt , flat washer , and wheel truck - wheel . Repeat step for each wheel.

 

Installation Instructions

Repeat this procedure for both the right and left wheel truck replacement.

  1. If the wheels were removed, reinstall the wheels (2x) onto the wheel truck assembly .
    1. Reinstall the wheel onto the wheel truck chassis and secure using the 9/16” bolt and flat washer . TorqueTorque is a measure of the force that can cause an object to rotate about an axis. Bolt/nut example: 5 nM torque is equivalent to 5 newtons of force applied one meter from the center of the bolt, 6 ft-lb is equivalent to 6 lb of force applied 1 foot away from the center of the bolt. fastener to 300 +/- 90 in-lbs (34 +/- 10 Nm). Repeat step for each wheel.

  1. Reinstall the wheel truck onto the Stairarm Spindle:
    1. Clean the Stairarm mounting hardware including: the wheel truck assy - spindle sleeve mounting hole, the spindle sleeve (inside & outside), and the Stairarm spindle mount of all grease and dirt.
    2. Then apply a thin coat of Super Lube® with Teflon® grease to the inside and outside of the spindle sleeve and install onto the Stairarm spindle .
    3. Reinstall the wheel truck assembly over the spindle sleeve onto the Stairarm spindle . Secure using a new 9/16” Nylock set screw mounting bolt and torque to 300 +/- 90 in-lbs (34 +/- 10 Nm). Only use a new 9/16” Nylock set screw mounting bolt , do not reuse the removed bolt.

  1. Use an approved cleaner (see  Cleaning Procedure) to clean the left and right Stairarm wheels and ramp tracks. Dry with a clean cloth. Clean any hard-to-remove grime using a Scotch-Bright pad (or fine steel wool). Dry ramp track surfaces with a clean rag.

  2. Reinstall the left and right Stairarm wheel trucks onto the CrossRamp tracks. To install, insert the top of the wheels underneath the Ramp cover while lifting the bottom of the wheels over and into the Ramp track. You may need to slightly lift up the edge of the CrossRamp cover while inserting the wheels into the CrossRamp track.

  3. Reconnect either the disconnected battery negative terminal or the Lift Motor input power/control cable.
  4. Select QUICKSTART and operate the elliptical at INCLINE level 1 and RESISTANCE level 1 at 130 strides per minute for two minutes, or longer, while listening for wheel squeak or other unusual noises.
    1. If there are wheel squeaking noises, remove the wheel truck and apply a thin coat of Swix UR10 Yellow Bio Racing ski wax (or equivalent) to the wheel contact area of the Ramp tracks. Rub the wax back and forth across the track several times.
    2. Operate the elliptical at INCLINE level 1 and RESISTANCE level 1 at 130 strides per minute for two minutes or more to break in the wax.
    3. Verify that there were no wheel noises during the wax break-in period. If there were noises, visually inspect the Ramp tracks to confirm wax coverage across the entire wheel contact path and repeat the wax application if needed.
    4. Gently wipe away any excess wax with a clean rag.

  5. Verify operation and return to service, see Operation Verification.

 

 

 

Contact Precor Customer Support (Ph 800.786.8404) with any questions.

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