Procedure for Steering Circuit Relief Pressure Test
Make sure hydraulic oil is at normal operating tem-
1.
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
2.
lowered and off. Make sure engine is off and the parking
brake is engaged.
Parkmachineonalevelsurfacewiththecuttingunits
1
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS, and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
Figure 26
Steering circuit pressure test port
1.
3.
Connect a 5000 PSI gauge onto steering pressure
test port.
1
4.
Start the engine and move throttle to full engine
speed (2730 + 30 RPM).
IMPORTANT: Hold steering wheel at full lock only
long enough to get a system pressure reading.
Holding the steering wheel against the stop for an
extended period will damage the steering motor.
5.
mentarily hold the steering wheel against resistance.
Turn steering all the way in one direction and mo-
2
GAUGE READING TO BE 1350 + 50 PSI.
6.
7.
(Fig. 27). If relief valve is operating properly and if lift/
lower problems also exist, gear pump should be sus-
pected of wear and inefficiency. If steering wheel
continues to turn at end of cylinder travel (with lower
than normal effort), steering cylinder or steering valve
should be suspected of wear or damage.
Stop the engine.
Figure 27
If pressure is incorrect, inspect steering relief valve
1.
Steering tower
2.
Steering relief valve
Groundsmaster 4000--D
Page 4 -- 37
Hydraulic System (Rev. B)
| Categories | Lawn Mower Manual, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro Groundsmaster 4000 D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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