MCi Crusader II 1989 Maintenance Manual page 65

Date
Page
MC-9 MAINTENANCE MANUAL
RAILING AXLE
Two independent rear trailing axles are mounted behind the
rear drive axle. Each axle carries a single wheel and tire, with
outside face 3-9/16" (90.4 mm) in from the outside face of the
outside dual tire of the drive axle. Each axle pivots independ-
ently on a trunnion, allowing sufficient independent movement.
Refer to Section ,
o
for lubrication.
Both of the swingarm type stub axles have hubs, bearings.
seals and attaching parts which are identical to those on the
front axle. See figure 2- 108.
REMOVAL
Rear trailing wheels are carried on independent oscillating
axle units, one for each wheel, attached to an axle tube located
behind the rear driving axle. .
To remove the right or left trailing axle assembly:
1. Exhaust air from suspension bellows by turning the air
release valve to the OFF position (lever in horizontal position)
until air is released from air springs.
2. Disconnect hose from the brake chamber.
3. Remove the wheel.
4. Remove the clamp which retains the axle assembly to the
axle tube.
5. Remove screws holding the air springs to the bellows
support plate. ·
6. Slide trailing axle assembly off cross tube bearing.
CAUTION: Do not apply air brakes until
reassembled, as loss of air from brake sys-
tem
will
result. ·
INSTALLATION
1. Install cross tube to bogie leg mounting plates, using
¾" -16 UNF capscrews. Torque to 315 ft lbs. (427 Nm). Tighten
outer bolts fully first and inner next.
2. Install cross tube brass bushing. With vent plugs removed,
install new trailing arm assembly. Install retaining clamps at arm
and cross tube assembly.
3. Reinstall bellows to spring seat Reinstall the balance of
assemblies and parts in the reverse order of removal.
Refer to Section 1 O of this manuai for lubrication of brake
camshafts and cross tube. When installing wheel oil seals, refer
to Section 15 of this manual. Add SAE 30 oil to wheel hubs if
required.
ALIGNMENT
Trailing wheel alignment must be checked when replacing
axles. Toe in of O" to a maximum of 1/a" (3.17 mm) is acceptable.
Rear wheel track is 76.5" (1.943 m). On some coaches with
toe-out conditions, minor corrections beyond the abo_ve limit
can be made by installing 20 Ga shims between flanges at inner
mounting bolts.
NOTE: The inner and outer flange faces of
cross-tube mounting must contact the bogie
leg flanges after the bolts are tightened.
1. Ann Assembly
2.
Spindle
3. Wear Sleeve
4. Split Washer
S.
Washer
6. Bearing Tube
7. Flange & Key
8. 0-Ring
9. 0-Rlng
10.
Clamp
(2
Halves)
11. Pipe Plug
12 •. Cross Tube
13. Clamp Bolt
14. Stud
1 S. Allen Screw
16. Vent Plug
17. Grease Fitting
Figure 2-108. Trailing Axle Assembly.