Toro Reelmaster 5510 Series, Руководство по обслуживанию

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Test Procedure (continued)
IMPORTANT
While performing this test, hold lower-mow/raise lever in the R
AISE
position only long enough to get a system pressure reading. Holding
the lever in raise for an extended period may damage system
components.
8. Ensure that the reel engage switch is O
FF
and then pull lower-mow/raise
lever rearward to pressurize lift circuit. While holding lever in the raise
(rearward) position, watch pressure gauge carefully. As the cutting units fully
raise and the lift relief valve lifts, system pressure should be—approximately
13,800 kPa (2,000 psi) .
9. Return the lower-mow/raise lever to the neutral position and shut off the
engine. Record test results.
10. If measured pressure is incorrect, remove solenoid relief valve (SVRV)
on lift control manifold and clean or replace valve; refer to Servicing the
Lift Control Manifold (page 6–198) . Also, if pressure is low, check for
restriction in pump intake line. Internal lift cylinder leakage would also
cause low lift circuit pressure; refer to
Lift Cylinder Internal Leakage Test
(5410/5410-G/5410-D/5510/5510-G/5510-D/5610) (page 6–92) . Gear pump
(P4) could also be suspected of wear, damage, or inefficiency.
11. After testing is completed, ensure that the engine is shut off, then relieve
hydraulic system pressure; refer to Releasing Pressure from the Hydraulic
System (page 6–8) . Disconnect pressure gauge from lift control manifold
test port.
Hydraulic System: Testing the Hydraulic System Page 6–88 Reelmaster ® 5410/5510/5610 Series
15216SL Rev C