Zf A132 Drive Axle; Maintenance; Differential Oil Type; Checking And Adjusting The Differential Oil Level - PREVOST H3-41 Maintenance Manual

SECTION 11: REAR AXLES
3.

ZF A132 DRIVE AXLE

This vehicle may be equipped with a ZF model
A132 Hypoid Single Reduction drive axle, fitted
with two Knorr Bremse brake chambers, Knorr
Bremse SN7 disc brake and companion flange
for Dana Spicer SPL250 propeller shaft. Visual
wear indicator or potentiometer wear indicator
may be installed. The carrier gear ratio is 3.54.
NOTE
Additional information is found in the following
manuals, included on your vehicle technical
publications USB drive:
 OPERATING INSTRUCTIONS ZF AXLE A132
(version with US hub) #5871 207 982 EN.
ZF AXLE A132

207 002E
FIGURE 10: ZF A132 DRIVE AXLE
3.1

MAINTENANCE

Proper vehicle operation starts with preventive
maintenance, which includes adequate operation
of the differential.
The most common causes of drive axle failures
are spinout, shock, fatigue, overheating and lack
of lubrication. Monitor these conditions as they
could be the first steps leading to improper
maintenance, expensive repairs, and excessive
downtime.
Inspect at the pinion oil seal, axle shaft flange
and carrier housing joint for evidence of lubricant
leakage. Tighten the bolts and nuts, or replace
the gaskets and seals to correct leaks.
Maintenance of the axle mountings consists
primarily in a regular and systematic inspection of
the radius rods, as directed in Section 16,
"Suspension".
3.1.1

Differential Oil Type

Use Chevron Multigear
(ZF lubricant class 12M). Other approved
lubricants may be use. Additional lubrication
information is covered in ZF's list of lubricants
TE-ML 12.
12
PA1621 Maintenance Manual All Series | January 2017
REPAIR MANUAL #5871
11019
Oil 80W90
3.1.2 Checking and Adjusting the Differential
Oil Level
Place the vehicle on a level surface.

Level check plug must be cleaned carefully

before opening.
Check oil level at room temperature only.

MAINTENANCE
Oil level check
Check differential oil level and add if
necessary at every engine oil change.
WARNING
Check the oil level when the axle is at room
temperature. When hot, the oil temperature
may be 190ºF (88ºC) or more and can cause
burns. Also, a correct reading is not obtained
when the axle is warm or hot.
 Make sure the axle is at room temperature.
 Clean the area around the level check plug.
Remove the level check plug from the
differential case.
The oil level must be even with the bottom of

the level check bore.
If oil flows from the hole when the plug is
loosened, the oil level is too high. Let drain
the oil to the correct level.
If the oil level is below the bottom of the level
check bore, add the specified oil through the
level check bore.
Reinstall the level check plug using a new

seals (O-ring).
Tighten to 52 lb-ft (71 Nm)
3.1.3

Differential Oil Change

 Place the vehicle on a level surface.
 Drain, filler and level check plugs must be
cleaned carefully before opening.
 Drain oil only at operating temperature,
immediately after the vehicle has been
operated for an extended period of time.
Renew seals components (O-rings).
