Specifications

Assembly and Installation
56 MAINTENANCE MANUAL
Large Micrometer Method
1.Hand-tighten the adjusting rings against the
main differential bearings.
2. Use a large micrometer to measure distance
X and Y between the opposite surfaces of the
bearing caps. Record the measurement. Fig-
ure 5.40 and Figure 5.41.
CAUTION
WHEN TURNING THE ADJUSTING RINGS,
ALWAYS USE A TOOL THAT ENGAGES TWO
OR MORE OPPOSITE NOTCHES IN THE
RING. A T-BAR WRENCH CAN BE USED FOR
THIS PURPOSE. IF THE TOOL DOES NOT
CORRECTLY FIT INTO THE NOTCHES, DAM-
AGE TO THE LUGS WILL OCCUR.
3. Use a T-bar wrench to tighten each bearing ad-
justingringonenotch.Figure5.36.
4. Measure distance X and Y again. Compare
the measurements with the distances X and Y
measured in Step 2. The difference between
the two distances is the amount the bearing
caps have expanded. See the Table H.
6. Proceed to check ring gear runout.
Figure 5.38
Figure 5.39
Figure 5.40
Figure 5.41
Table H: Example
BARS MUST NOT
TOUCH BEARING
SQUEEZE EACH
RING IN A GROOVE
KEY “T”
MICROMETER
Distances X and Y BEFORE
tighteningtheadjustingrings
= 389 mm (15.315”)
Distances X and Y AFTER
tighteningtheadjustingrings
= 389 mm (15.315”)
15.324” – 15.315” = 0.009” difference
389.230 mm – 389.000 mm = 0.230 mm difference