Procedure for Traction Circuit Working Pressure
Test:
2
1.
perature by operating the machine for approximately 10
minutes.
Make sure hydraulic oil is at normal operating tem-
2.
lowered and off. Make sure engine is off.
Parkmachineonalevelsurfacewiththecuttingunits
3.
4.
Read Precautions for Hydraulic Testing.
1
Make sure that traction pedal is adjusted to the neu-
tral position (see Adjust Traction Drive for Neutral in the
Adjustments Section).
Figure 17
1.
Hydraulic tube with plug
2.
Floor plate
5.
Remove plug from hydraulic tube connected to front
wheel motors (Fig. 17). Connect test gauge with a hy-
draulic hose attached to the hydraulic tube opening.
Makesurehoseislongenoughsotheoperator canread
gauge while driving the machine.
6.
50
Start engine and move throttle to full speed (3050 +
RPM).
CAUTION
Donotoperate sidewinder whileperformingtest.
The test gauge hose may get hit by the sidewind-
er carrier and rupture, and cause personal injury.
7.
Drivemachineintheforwarddirection. Observetest
gauge:
A. Pressure while transporting the machine over a
flat, level surface should be about 500 PSI.
B. Pressure driving the machine up a steep hill
should be about 3300 PSI but can reach relief set-
tings (3500 PSI).
C. Pressure while mowing should range between
1000
to 2000 PSI and will vary with terrain condi-
tions.
8.
9.
Release traction pedal and turn off machine.
Disconnect test gauge and hose from the hydraulic
tube. Install plug into tube opening.
10.If
specification is not met, the hydrostat needs to be
repaired or replaced as necessary.
Groundsmaster 3500--D
Page 4 -- 31
Hydraulic System (Rev. D)
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