8-17
TMS800E SERVICE MANUAL UNDERCARRIAGE
Published 01-29-2014, Control # 496-00
for a lowering in the hanger and distorted or frayed rubber. A
gap on each side of the visible rubber at the lower end of the
end bushing is normal because the end bushing is in
compression.
Saddle Assembly End Cap Fasteners
Periodically check the bolt torque on the saddle assembly
end caps. Torque should be 305 to 372 Nm (225 to 275 lb-ft).
Beam Center Bushings
The beam center bushings control lateral movement of the
axles during cornering. Normal wear is evidenced by rubber
shredding from each end of the bushing. Worn bushings
result in increased lateral movement on turns, causing the
inside walls of the tires to rub on the suspension saddle
assemblies during turns. Replace the bushings before
serious tire damage results.
Beam Center Cross Tube
The center cross tube connects the two walking beams and
maintains axle alignment in turns. Inspect the cross tube for
damage and, if bent, it must be replaced. A bent tube will
result in axle misalignment and cause abnormal tire wear.
Air Bags
Check for wear or road damage. Check for air leaks. Check
tightness of nuts and bolts. Torque to 41 Nm (30 lb-ft).
Height Control Valves
Check valve, fittings, and air lines for leaks. Check actuating
linkage for bent or damaged condition.
FIGURE 8-11
3
4
6
8
4
8
3
2
1
7
6
5
1
9
2
6573
Item Description
1 Rear Drive Axles
2 Air Brake Chambers
3 Lateral Torque Rod
4 Torque Rod Assembly
5 Saddle Assembly
6 Air Bags
7 Walking Beam
8 Shock Absorber
9 Drive Line
Item Description
Reference Only