Procedure for Traction Circuit Reducing Valve (PR)
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 36
1.
2.
2WD/4WD control manifold
Pressure 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.
3.
control manifold under radiator (Fig. 36).
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.
traction pedal in the reverse direction. While pushing
traction pedal, look at pressure reading on gauge:
Sitonseat,applybrakesfully,andslowlydepressthe
1
2
Figure 37
2.
GAUGE READING TO BE 650 PSI (approximate).
1.
Manifold: lower side
Reducing valve (PR)
6.
front side of the 2WD/4WD control manifold (Fig. 37).
Adjustment of this valve can be performed as follows:
Pressurereducingvalve(PR)islocatedonthelower,
NOTE: Do not remove the valve from the hydraulic
manifold for adjustment.
A. To increase pressure setting, remove cap on re-
ducing valve and turn the adjustment socket on the
valve in a clockwise direction. A 1/8 turn on the sock-
et will make a measurable change in pressure set-
ting.
B. To decrease pressure setting, remove cap on re-
ducing valve and turn the adjustment socket on the
valve in a counterclockwise direction. A 1/8 turn on
the socket will make a measurable change in pres-
sure setting.
C. Recheck pressure setting and readjust as need-
ed.
Groundsmaster 4000--D
Page 4 -- 47
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 |
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
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