Columbia ParCar Expediter EX21-24A, Service Manual

Page: 52 / 94

Section 7 - Rear Wheels,
Rear Suspension & Axle Assembly
Always turn power key to off, directional keyswitch to
neutral, remove power key, block tires and disconnect
the battery negative (-) cable before performing any
vehicle service to avoid accidental startup of vehicle
and possible personal injury.
REAR WHEELS
To perform this service, raise vehicle using floor jack
and safely support it with jack stands positioned under
main frame tubes. See Section 3 Maintenance - Lifting
Instructions.
REMOVING REAR WHEELS
1. Before raising vehicle, with wheels on the ground, break
loose the lug nuts.
2. Raise the vehicle and engage the brake. Remove four lug
nuts and remove rear wheel/tire assembly. Repeat for
other rear wheel.
3. Repeat steps 1 - 2 for the other rear wheel.
REAR AXLE WHEEL BEARINGS
Rear axle wheel bearings are sealed type bearings and cannot
be repacked. Bearings must be replaced if worn or damaged.
Refer to
Disassembling Rear Axle for bearing replacement
procedures.
INSTALLING REAR WHEELS
1. Place wheel assembly on the hub studs.
2. Tighten four lug nuts by hand and wrench until snug using
a criss-cross pattern.
3. Lower the vehicle to the ground and torque the lug nuts to
65 ft. lbs. using the same criss-crossing pattern.
TIRES
In the event of a flat tire, remove wheel assembly from vehicle
and follow standard tire repair procedures.
REAR SUSPENSION
To perform this service, raise vehicle using floor jack
and safely support it with jack stands positioned under
main frame tubes. See Section 3 Maintenance - Lifting
Instructions.
REPLACING REAR SHOCK ABSORBER
Replace shock absorber if dampening effect is not present
when shock absorber is collapsed or extended, or there are
signs of oil leakage.
1. Raise the rear body.
2. Remove upper and lower mounting bolts and nuts
securing shock absorber (Figure 7-3).
3. Install new shock absorber and secure with mounting
bolts and new nylock nuts. Torque to 45 ft. lbs. (61 Nm).
4. Lower the rear body.
REPLACING REAR SPRINGS
1. Place a hydraulic jack under the rear carrier assembly.
2. Remove rear shock absorbers as described above.
3. Slowly lower the rear carrier/axle assembly until springs
can be removed (Figure 7-3).
4. Install new springs and raise rear carrier/axle assembly to
seat the springs.
5. Reinstall shocks.