Inspection; Main Case And Arms; Gears; Bearings - PRM NEWAGE 415 Series Workshop Manual

INSPECTION

Main Case and Arms

Inspect for cracks. Check sealing surfaces for any imperfections, damage, etc. which will lead to oil
leaks. Check all threads for damage.

Gears

Inspect for any chipped, broken or cracked gear teeth, also for any excessive wear i.e. initial or
progressive gear pitting.

Bearings

Inspect for any damage, denting, initial or progressive pitting and over-heating. Each time a Bearing
is removed for inspection, or replacement it will be necessary to recalculate the required shim
thickness to pre-load the Bearings correctly, see Procedures for more information.

Threaded Parts

Inspect for stripped or damaged threads.

PROCEDURES

CAUTION: When re-assembling the Axle all threaded fasteners must be tightened to the
specified torques to prevent premature failure. Refer to Fastner Tightening Torque on page 9.
Some servicing operations can be carried out with the Axle still mounted to the vehicle (provided, of
course, that there is sufficient space); an example of this is the replacement or repair of the brake
assemblies. The repair or replacing the Differential, Planetaries or Arm assemblies however will
require the complete removal of the Axle from the vehicle.
If the details outlined below are carefully followed no difficulty will be found in stripping and
rebuilding the Axle. It is most important that all components are perfectly clean and in good
condition before reassembly.
CAUTION: All gears are supported by taper roller Bearings. Each time a bearing has been
removed for inspection, component repair or replacement it will be necessary to recalculate
the Shim thickness or adjust the Wheel and Differential Bearing to give the required pre-load.
Re-Shimming of the Axle is detailed under the Axle Shimming procedure.
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