Procedure for Wheel Motor Efficiency Test:
Make sure hydraulic oil is at normal operating tem-
12.Motor internal leakage will be shown on flow meter
in GPM. Flow should be less than 1.5 GPM for the
tested wheel motor.
1.
perature. Make sure the hydraulic tank is full.
13.If
needs to be repaired or replaced as necessary.
specifications are not met, the tested wheel motor
2.
lowered and off. Make sure engine is off and the parking
brake is engaged.
Parkmachineonalevelsurfacewiththecuttingunits
14.If remaining front wheel motor requires testing, com-
plete steps 5 to 14 for the remaining motor.
3.
4.
tral position (see Adjust Traction Drive for Neutral in the
Adjustments Section).
Read Precautions for Hydraulic Testing.
15.Relieve
hydraulic system pressure (See Relieving
Make sure that traction pedal is adjusted to the neu-
Hydraulic System Pressure in the General Information
section). Disconnect tester from hydraulic fitting and
hose. Reconnect hose to pump connection.
5.
and an immovable object to prevent the machine from
moving during testing.
Attachaheavychaintotherearofthemachineframe
6.
the wheel. Make sure parking brake is on.
Chock front wheel being tested to prevent rotation of
2
WARNING
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved. See Relieving Hy-
draulic System Pressure in the General Infor-
mation section.
1
Figure 19
1.
Lower hydraulic fitting
2.
Piston pump
7.
Disconnect hydraulic lines from front wheel motor
that is not being tested. Cap disconnected hydraulic
lines and plug ports in wheel motor to prevent contami-
nation.
8.
Disconnect hose from the lower hydraulic fitting on
the bottom of the hydrostat (Fig. 19).
NOTE: An alternate testing location would be at the hy-
draulic hose connection to the hydraulic tube under the
left floor plate.
9.
with the pump and the disconnected hose. Make sure
the tester flow control valve is fully open.
Install hydraulic tester (pressure and flow) in series
10.Start
engine and move throttle to full speed (3050 +
50
RPM).
CAUTION
Use extreme caution when performing test. The
front tire on the ground will be trying to move the
machine forward.
11.
1000
Slowly push traction pedal in forward direction until
PSI is displayed on the tester pressure gauge.
Groundsmaster 3505--D Page 4 -- 33
Hydraulic System
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