Greensmaster 3150 Hydraulic SystemPage 4 -- 31
6. Chock frontwheelbeingtested toprevent rotationof
the wheel.
7. Thoroughly clean junction of hydraulic lines and fit-
tings at the front wheel motor that is not being tested.
Disconnect hydraulic lines from front wheel motor that
is not being tested. Cap the disconnected hydraulic
lines and plug ports in wheel motor.
8. Thoroughly clean junction of hydraulic hose and hy-
draulic tube that connects to the upper hydraulic fitting
onthefrontsideofthepistonpump(Fig.20).Disconnect
hose from the tube.
9. Install tester with pressure gauge and flow meter in
series with thepump and the disconnected hose(same
tester connections as Piston (Traction) Pump Flow
Test). Make surethe tester flow control valveis fully
open.
CAUTION
Use extreme caution when performing test. The
wheel being tested will be trying tomove the ma-
chine.
10.Start engine and move throttle to high idle speed
(2850 +
50 RPM).
11.Slowly push traction pedal in forward direction until
1000 PSI (69 bar) is displayed on the tester pressure
gauge.Makesurethatwheeldoesnotrotateduringtest.
12.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.
13.Release traction pedal, rotate wheel being tested
and retest. Testing of wheel motor leakage in three (3)
differentwheel positions will provide most accurate test
results.
14.Release traction pedal and shut engine off. Record
results of flow test.
15.If specification is not met, the t ested wheel motor
needs to be repaired or replaced as necessary.
16.Test second front wheel motor. Reconnect hydraulic
linesto untestedfront wheelmotor. Disconnect andcap
hydraulic lines to previously tested front wheel motor.
Completesteps10to15forthesecondfrontwheelmo-
tor.
17.If machine has 3 wheel drive, test rear wheel motor:
A. Both front wheel motors should have hydraulic
lines connected. Block up both front wheels off the
ground to allow flow through the rear wheel motors.
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.
C. Positionrearwheelonthegroundandchockrear
wheel to prevent it from turning.
CAUTION
Use extreme caution when performing test. The
rear wheel will be trying to move t he machine.
D. Complete steps 10 to 15 for rear wheel motor
testing.
18.Whentestingiscomplete,disconnecttester fromhy-
draulic tube and hose. Reconnect hose to hydraulic
tube. Reconnect hydraulic lines to rear wheel motor.
1. Piston pump
2. Upper fitting
3. Hydraulic tube
4. Hydraulic hose
Figure 20
1
2
3
4
FRONT
Hydraulic
System
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