Lull 1044C-54 Series II Service Manual - Manual (Page 351)

Axles and Brakes
31200079 9-7
Detailed axle service instructions (covering the axle, differential, brakes
and wheel-end safety, repair, disassembly, reassembly, adjustment and
troubleshooting information) are provided in the Axle Repair Manuals.
(Refer to The Zahnradfabrik (ZF) Repair Manual).
The axle should be checked, serviced and repaired only by experienced
service technicians who are aware of all safety instructions and particular
component features.
Drive Shafts
Drive Shaft Inspection and Service
Whenever servicing the machine, conduct a visual inspection of the drive
shafts and cross and bearing assemblies (universal joints, or U-joints). A
few moments spent doing this can help prevent further problems and down
time later.
Inspect areas where the drive shaft flange yokes and slip yokes mount to
the drive shafts. Attempt to turn each drive shaft in both directions. Look
for excessive looseness, missing parts, cracks or other damage. Worn or
damaged drive shafts and cross and bearing assemblies may cause an
excessive amount of vibration or noise.
Individually inspect each cross the needle bearings and cap for signs of
wear or for missing parts.
Note: Replace the cross and bearings as a complete assembly if any parts are
worn or missing. If all parts of the cross and bearing assemblies are in good
condition, pack the bearing caps with a premium grade of multi-purpose
wheel-bearing grease. Reattach the bearing cap to the cross, assuring that
all needle bearings are present. Then, reassemble the cross and bearing
assembly into the drive shaft yoke.
1. Replace the felt seal if worn or damaged.
2. Replace the entire drive shaft assembly if any flange yoke, slip yoke or
drive shaft tube is severely dented or damaged.
Cross assemblies should flex and be free from excessive binding. A slight
amount of drag or resistance is desirable on a new cross and bearing
assembly. Excessive looseness causes unbalance.