Procedure for Rear Traction Circuit (RV5) Relief
Pressure Test
1
1.
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
Make sure hydraulic oil is at normal operating tem-
2.
lowered and off. Make sure engine is off and the parking
brake is engaged.
Parkmachineonalevelsurfacewiththecuttingunits
2
CAUTION
Figure 33
1.
2.
2WD/4WD control manifold
Relief valve test port
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.
2
3.
control manifold under radiator (Fig. 33).
Connect a 1000 PSI gauge to test port on 2WD/4WD
4.
(2730
Start the engine and put throttle at full engine speed
+ 30 RPM).
5.
Operate the machine in 4WD with the cutting units
1
lowered. Drive down a slope in a forward direction, de-
crease pressure on the traction pedal, and monitor the
pressure gauge. Pressure should increase until the re-
lief valve lifts.
Figure 34
1.
Manifold: lower side
2.
Relief valve (RV5)
GAUGE READING TO BE 750 PSI (approximate).
6.
of the 2WD/4WD control manifold (Fig. 34). Adjustment
of the relief valve can be performed as follows:
Relief valve (RV5) is located on the lower, front side
NOTE: Do not remove the valve from the hydraulic
manifold for adjustment.
1
A. To increase relief pressure setting, remove cap
on relief valve and turn the adjustment socket on the
relief valve in a clockwise direction. A 1/8 turn on the
socket will make a measurable change in relief pres-
sure (Fig. 35).
B. To decrease pressure setting, remove cap on re-
lief valve and turn the adjustment socket on the relief
valve in a counterclockwise direction. A 1/8 turn on
the socket will make a measurable change in relief
pressure (Fig. 35).
2
C. Recheck relief pressure and readjust as needed.
Figure 35
1.
Relief valve cap
2.
Adjustment socket
Groundsmaster 4000--D
Page 4 -- 45
Hydraulic System (Rev. B)
| Categories | Lawn Mower Manual, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro Groundsmaster 4000 D |
| Download File |
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| Document Type | Service Manual |
| Language | English |
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
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