Procedure for Wheel Motor Efficiency Test
Over a period of time, a wheel motor can wear
12. Slowly push traction pedal in forward direction until
PSI (69 bar) is displayed on the tester pressure
gauge.
1000
Note:
internally.Awornmotormayby--passoiltoitscasedrain
causing the motor to be less efficient. Eventually,
enough oil loss will cause the wheel motor to stall under
heavyloadconditions.Continuedoperationwithaworn,
inefficient motor can generate excessive heat, cause
damage to seals and other components in the hydraulic
system, and affect overall machine performance.
13. Wheel motor internal leakage will be shown on flow
meter in GPM. Flow should be less than 1.5 GPM for
the tested wheel motor.
14.
Release traction pedal, rotate wheel being tested,
and retest. Testing of wheel motor leakage in three dif-
ferentwheelpositions willprovide mostaccurate testre-
sults.
1.
Make sure hydraulic oil is at normal operating tem-
peraturebyoperatingthemachineforapproximatelyten
15.
results of flow test.
Release traction pedal and shut engine off. Record
(10)
2.
minutes. Make sure the hydraulic tank is full.
Park machine on a level surface with the cutting
16.
needs to be repaired or replaced as necessary.
If specification is not met, the tested wheel motor
units lowered and off. Make sure engine is off and the
parking brake is engaged.
17.
Testsecondfrontwheelmotor.Reconnecthydraulic
3.
Read Precautions for Hydraulic Testing.
lines to untested front wheel motor. Disconnect and cap
hydraulic lines to tested front wheel motor. Complete
steps 11 to 16 for the second front wheel motor.
4.
tral position (see Adjust Traction Drive for Neutral in the
Adjustments Section).
Make sure that traction pedal is adjusted to the neu-
18.
If machine has 3 wheel drive, test rear wheel motor:
5.
frame and an immovable object to prevent the machine
from moving during testing.
Attach a heavy chain to the rear of the machine
A. Both front wheel motors should have hydraulic
lines connected. Block up both front wheels off the
ground. Release parking brake so front wheels can
turn freely.
6.
If machine has 3 wheel drive, block up the rear
wheelofftheground toallowflowthroughtherearwheel
motor.
B. Attach a heavy chain to the rear of the machine
frame and an immovable object to prevent the ma-
chine from moving during testing.
7.
Chock front wheel being tested to prevent rotation
of the wheel. Make sure parking brake is on.
C. Position rear wheel on the ground and chock
rear wheel to prevent it from turning.
8.
Disconnect hydraulic lines from front wheel motor
that is not being tested. Cap the disconnected hydraulic
lines and plug ports in wheel motor (see Special Tools).
CAUTION
9.
Disconnect hose from the upper hydraulic fitting on
the side of the hydrostat.
Use extreme caution when performing test. The
rear wheel will be trying to move the machine.
10.
Install tester with pressure gauge and flow meter in
series with the pump and the disconnected hose (same
tester connections as Traction Drive Hydrostat (P3)
Flow Test). Make sure the tester flow control valve is
fully open.
D. Complete steps 11 to 16.
19.
Disconnect tester from hydraulic fitting and hose.
Reconnect hose to pump connection.
CAUTION
Use extreme caution when performing test. The
wheel being tested will be trying to move the ma-
chine.
11.
50
Start engine and move throttle to full speed (2750 +
RPM).
Greensmaster 3250--D
Page 4 -- 37
Hydraulic System (Rev. I)
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| Tags | Toro Greensmaster 3250 D |
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| Language | English |
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