Procedure for Traction Circuit Reducing Valve (PR)
Pressure Test
C. Recheck reducing valve (PR) pressure setting
and readjust as needed.
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-
9. Disconnect pressure gauge from test port.
1
2.
Parkmachineonalevelsurfacewiththecuttingdeck
lowered and off. Make sure engine is off and the parking
brake is engaged.
CAUTION
2
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 29
1.
2.
4WD control manifold
Pressure test port
3.
Connect a 1000 PSI (70 bar) gauge to test port on
4WD control manifold under radiator (Fig. 29).
4.
at idle speed. Check for hydraulic leakage and correct
before proceeding with test.
After installing pressure gauge, start engine and run
1
5.
Makesurethattransport/4WDswitchisinthe4WDposi-
tion.
Operatetheengineatfullenginespeed (2870RPM).
2
6.
traction pedal in the reverse direction. While pushing
Siton seat,apply brakes fully andslowly depress the
traction pedal, look at pressure reading on gauge:
Figure 30
2.
GAUGE READING TO BE 650 PSI (45 bar)
(approximate).
1.
Manifold: front side
Reducing valve (PR)
7.
8.
side of the 4WD control manifold (Fig. 30). Adjustment
of this valve can be performed as follows:
Stop engine and record test results.
Pressure reducing valve (PR) is located on the front
NOTE: Do not remove the pressure reducing 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.
Groundsmaster 4100--D
Page 4 -- 41
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Document Type | Service Manual |
| Language | English |
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