Manitowoc Grove TMS800E Service And Maintenance Manual page 300

UNDERCARRIAGE
Shock Absorbers
Check the shock absorbers for leakage and wear.
NOTE: For more information on the axles, refer to Volume
2 - S e r v i c e M a i n t e n a n c e M a n u a l o r t h e
Arvinmeritor web site.
Removal
NOTE: The axle does not have to be removed from the
crane for maintenance.
1. Raise the crane on outriggers until the weight is off the
tires and place jack stands under the carrier frame.
2. Completely drain the air pressure from both systems.
3. Remove the tire and wheel assemblies from both sides
of the axles.
4. Place an adequate lifting/supporting device under the
axles and suspension system.
NOTE: The axle and
approximately 2232 kg (4921 lb).
5. Tag and disconnect the air lines to the four brake
chambers and the four air bags. Remove the fittings
from the air bag connections. Cap all hoses and
openings.
6. Disconnect the drive shaft from the front rear axle.
7. Remove the capscrews, washers, and hex nuts (lateral
torque rod only) securing each of the torque rods to the
carrier frame.
8. Remove the hardware securing the linkage rod of each
height control valve to its respective saddle assembly.
9. Remove the capscrew, washer, and hex nuts securing
each shock absorber to the carrier frame.
10. With the axles and suspension fully supported, remove
the nuts and washers securing each of the four air bags
to the carrier frame brackets.
11. Remove the bolts and flatwashers securing each of the
four saddle assemblies cap blocks to the carrier frame
brackets.
12. Remove the axles and suspension assembly from under
the carrier.
Disassembly
Disassemble the axle and suspension assembly as
necessary using the following procedures.
1. Remove the drive line between the two rear axles.
2. Remove the bolts, hardened washers, and nuts securing
each fore and aft torque rod to the axle brackets.
Remove the torque rod(s).
8-18
suspension system weighs
Published 01-29-2014, Control # 496-00
TMS800E SERVICE MANUAL
3. Remove the nut securing each lateral torque rod to the
axle brackets. Remove the torque rod(s).
4. Remove each shock absorber from the suspension
saddle assembly by removing the bolt and flatwashers
securing each. Remove the shock absorber(s).
5. Remove each axle from the walking beams by removing
the bolts, flatwashers, locknuts and shim securing each
end of the axle to the walking beam end bushings.
Remove the axle(s).
6. Remove the saddle assemblies from the walking beams
by removing two bolts and flatwashers from each pivot
block cap. Remove the caps. Remove the saddle
assemblies and the trunnion tube from the walking
beams.
7. Remove each air bag from the saddle assembly by
removing the locknut and flatwasher. Remove the air
bag(s).
Assembly
As necessary, assemble the axle and suspension assembly
using the following procedures.
1. Position the air bag(s) on the saddle assembly and
secure each with a locknut and flatwasher.
2. Position the trunnion tube through the center bushing on
each walking beam. Position each saddle assembly
over the center bushing and secure with the pivot block
cap and bolts and flatwashers. Torque the bolts 305 to
373 Nm (225 to 275 lb-ft).
3. Position the axle(s) under the walking beams aligning
the axle brackets with the bar end bushings on the
walking beams. Secure each end with the bolts,
flatwashers, locknuts and shim. Torque the bolts 610 to
814 Nm (450 to 600 lb-ft).
4. Position the shock absorber(s) on the saddle assembly
and secure each with a bolt and flatwasher. Torque the
nuts 610 Nm (450 lb-ft).
5. Position the fore and aft torque rods in the axle brackets
and secure each with two bolts, hardened washers, and
nuts. Place two additional hardened washers on each
side between torque rod and bracket. Torque the nuts
769 to 834 Nm (567 to 615 lb-ft).
6. Position the lateral torque rods in the axle brackets and
secure each with a nut and cotter pin. Torque the nuts
237 to 305 Nm (175 to 225 lb-ft).
7. Connect the drive shaft between the two rear axles.