Sunrise Medical 931157 service manual Motor/Wheel Disassembly, Adjustment

Disassembly/Reassembly, and Adjustment (cont)

Step 8 - Motor/Wheel

Disassembly

Note: For ease of disassembly, set the base frame on a block where all six wheels are at least 1 inch above the ground.

a.Unwrap the wire looms from the motor and pull the motor connector out (figure s8.1).

b.Depress the motor connector locking tab and unplug it (figure s8.1).

c.Use a 5mm hex key to remove the six mounting screws (figure s8.2).

d.Hold the motor-wheel assembly and tilt the cog release rod toward the center of the base to get around the motor mount, then pull the motor-wheel assembly out through the bottom of the frame.

e.Straighten the lock washer tab of the drive wheel.

f.Use a 17mm deep socket wrench to remove the drive wheel retention nut, then pull the drive wheel out from the motor shaft.

Note: If the drive wheel is difficult to remove, then remove the wheel plate screws (Phillips Head)

Reassembly

a.Perform the reverse of instructions above. Note: Torque specifications

* Motor mounting screws	15-20 ft-lbs
* Wheel retention nut	35-40 ft-lbs
* Wheel plate screw	15-20 ft-lbs

Adjustment

Note: There is a suspension bumper on the frame to limit the motor’s movement (figure 8.3). It also changes the pre- load on the front caster.

a. Use a 13mm open wrench to loosen or tighten the jam nut and make the proper adjustment (operator preference). b. Install wire tie on back inside corner of gear box.

s8.1

s8.2

s8.3

SUNRISE MEDICAL ASPIRE SERVICE MANUAL 2003 PAGE 16