S0602170K
Page 72
Axle (ZF AP 420R)
6. Check tightness of the brake hydraulic
system
A. Afterwards, build up a pressure of 5
bar (70 psi) and close the stopcock.
B. Within 5 minutes there may be no
pressure break.
C. Install bleeder valve.
NOTE:
See “Special Tools” on page 15.
D. Tighten oil drain plug.
NOTE:
Torque limit 50 Nm (37 ft lb).
NOTE:
Before the Axle is put into
service, follow the “Lubrication
Instructions” on page 8
CAUTION!
Bleed the brake.
After having applied the brake for
about 10 times carry out the
following pressure test.
Using a suitable pressure apparatus
(Lukas or similar) with stopcock
build up an actuating pressure of 120
bar.
Close the stopcock and pressurize
the brake for 5 minutes with this
pressure. After this timer the
pressure may have dropped to 117
bar (1,700 psi) only.
Figure 150
Figure 151
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