HYDRAULICS
8M-68
Implement Pump Test
1. Disconnect pressure hose from implement pump
(Figure 8M-15).
2. Install tee fittings onto the flow meter to set up for
“T” test with 4 hoses as illustrated in (Figure 8M-
15).
3. Connect flow meter “IN” hose to the fitting on the
implement pump and connect the flow meter
“OUT” hose to the hydraulic tank (Figure 8M-15).
4. Connect second flow meter “IN” hose to hose pre-
viously disconnected from implement pump with a
blocking disc inserted (Figure 8M-15).
5. Open the tester load valve.
6. Set the parking brake, start the engine, and
advance the engine speed to full throttle.
7. Observe and record the implement pump no load
flow A) on Flow Test Report 2.
8. Slowly close tester load valve until a reading of
2000 psi (138 Bar) is obtained. Read and record
flow B) on Flow Test Report 2.
9. Shut off engine.
Conclusion
• If leakage is less than 1 gpm (3.8 lpm), implement
pump is not at fault.
• If leakage is 1 to 1-1/2 gpm (3.8 to 5.6 lpm),
implement pump is marginal.
• If leakage is 1-1/2 gpm (5.6 lpm) or more, implement
pump is faulty.
10.Remove the blocking disc inserted between hose
and tee fitting. Connect the hose back onto the tee
fitting for the next test.
CAUTION
Do not totally close the flow meter load valve,
as the pump is not protected by the relief valve
in this test. Do not exceed 2500 psi (172 Bar).
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