BACKLASH ADJUSTMENT GUIDELINE
BACKLASH
MEASUREMENT
Below 0.05 mm (.002 in)
Above 0.36 mm (.014 in)
vmr2015-139-004_c
1. Backlash shim
Preload Inspection
Screw the propeller shaft screw in pinion gear.
vmr2006-023-011_a
TYPICAL
Using a needle torque wrench, measure the
preload.
vmr2015-139
Subsection 02 (MIDDLE AND REAR FINAL DRIVE)
WHAT TO DO
Add shim(s) and recheck
backlash
Remove shim(s) and
recheck backlash
Section 06 DRIVE SYSTEM
vmr2006-023-012
TYPICAL
PRELOAD SPECIFICATION
0.06 N•m (.5 lbf•in) to 0.50 N•m (4 lbf•in)
If preload is out of specification, split final drive
housing and adjust shim thickness as per follow-
ing guideline.
PRELOAD GUIDELINE
PRELOAD
MEASUREMENT
Below 0.06 N•m
(.5 lbf•in)
Above 0.50 N•m
(4 lbf•in)
vmr2015-139-004_b
1. Preload shim
Middle Drive Disassembly
Ring Gear Removal
Remove the middle drive housing screws.
WHAT TO DO
Add shim(s) and recheck
preload
Remove shim(s) and
recheck preload
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