HYDRAULIC TESTING
9-12 Rev. 000 TX525 Service Manual
Pressure Test
1. Listed below are the Parker Hydraulics part numbers
to make the test port for hydraulic pressure testing
(Fig. 1862).
Fig 1862 PICT-3409c
A. 8R6LO-S Tee îš¿tting o-ring faced
B. 8-6TRLON-S Adaptor
C. PD36BTL Fitting
Fig 1863 PICT-3523a
Pressure Tester (Fig. 1863):
A
B
C
This test determines if the loader valve relief is properly
set or working correctly. The components involved in this
test are: gear pump, hydraulic lines, loader valve and
test port îš¿tting. If the pressure can not be adjusted to
meet speciîš¿cation then the loader valve or relief valve
will need to be repaired or replaced. If the pressure
meets speciîš¿cation the loader valve is not the problem.
The lift or tilt cylinder could be at fault.
System ow test should be completed to assure proper
ow from the pump is obtained.
1. Cycle the hydraulic oil until warm.
2. Park the unit on level ground.
3. Set the park brake.
4. Cycle the loader valve to relieve any pressure from
the circuit.
Note: There is no hydraulic test port for the drive or
loadercircuits.Testportttingsneedtobe
purchased at a local hydraulic supplier.
Loader Circuit Pressure Test
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