GROVE Published 10-21-2010, Control# 198-04 7-57
5540F/YB5515 SERVICE MANUAL TRANSMISSION AND TORQUE CONVERTER
Hydraulic 2/4-Wheel Drive Unit Pressure
Testing (Spring ON/Pressure OFF Type)
1. Assemble the 2/4-wheel drive unit, as described in
Assembly, see Figure 7-93.
2. Check the clutch pack end float and adjust as required,
see Assembly.
3. Using special tool 993/59300, insert the adaptor A into
the oil gallery in the end of the 2/4-wheel drive unit shaft
as shown. Hold the adaptor in position with clamp B.
4. Use a hand pump to pressurize the clutch assembly until
gear, item 5 can be turned by hand. Note the pressure
gauge reading - DO NOT EXCEED 200 psi (13.8 bar).
5. If the pressure gauge reading is between 125 - 135 psi
(8.6 - 9.3 bar) then the clutch is operating correctly and
can be fitted into the gearbox.
6. If however the pressure gauge reading is above 135 psi
(9.3 bar) then check the unit for assembly defects,
especially the clutch pack end float (the shim may not be
to the correct thickness). Re-test after checking for (and
rectifying) assembly defects.
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