S0602170K
Page 106
Axle (ZF AP 420R)
DIFFERENTIAL REASSEMBLY (VERSION - SCREWED
AND CAST-ON BEARING CAPS)
NOTE:
If crown wheel or drive pinion are damaged, the two parts must be replaced as a set. If a
new complete crown wheel set is installed, pay attention that crown wheel and drive pinion
have the same mating numbers.
NOTE:
When replacing a complete crown wheel set or axle carrier, pay attention to the Figure
243.
DETERMINE THICKNESS OF SHIM
NOTE:
The following measuring operations must be carried out with utmost care. Inexact
measurements would cause an incorrect contact pattern and require a replacement of the
drive pinion and the differential (partial) after the contact pattern has been taken.
1. Install adjusting pieces (3) and temporarily
fasten the two bearing caps. Install stop
washer (2) and measuring pin (1) and
introduce measuring shaft (4) (see Figure
243.
Special
Tools
2. Determine gap (Dimension b) between
measuring piston and measuring shaft
with feeler gauge.
• Dimension b e.g. 2.50 mm (0.0984
in).
EXAMPLE I
Reference
Number
Description
1 Measuring Pin
2 Stop Washer
3 Adjusting Piece
4 Measuring Shaft
Dimension a (measuring piston) 224.00 mm (8.8189 in)
Dimension b + 2.50 mm (0.0984 in)
Dimension C (1/2 ∅ measuring shaft) + 15.00 mm (0.5906 in)
Gives Dimension "X" = 241.50 mm (9.5079 in)
Figure 243
Figure 244
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