Jacobsen HR 5111, Инструкции по обслуживанию и ремонту

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HYDRAULICS
SECTION 8R. INSTRUMENT TEST
8R-18
Figure 8R-17. Pump Test Wing Motor
WING MOWERS
Pump Test (See Figure 8R-17)
Pump section 1 supplies oil to the right wing and pump
section 2 to the left wing. The test procedure is the
same for both circuits. Test the circuit having the fault.
1. Remove outlet line from the pump section 1.
2. Connect the IN port of the tester to the pump out-
let port and plug pump outlet line.
3. Put the hose from the OUT port of tester into the
hydraulic tank.
4. Open tester load valve, start engine, advance throt-
tle to 2800 engine rpm.
5. Read/record no load flow. It should be 10.0 gpm.
6. Slowly close tester load valve until 2500 psi is ob-
tained and allow oil to heat up to 150°F.
7. Read/record gpm flow and engine rpm.
•
If flow drops 1/2 gpm or less, pump is okay, pro-
ceed with Step 8.
•
If flow drop is 1/2–1 gpm, pump is marginal.
•
If flow drops more than 1 gpm, pump has exces-
sive internal leakage.