4.
Make sure that traction pedal is adjusted to the neu-
12.Observe flow gauge. Flow indication should be
approximately 28 GPM (106 LPM).
tral position. Also, ensure that traction pump is at full
stroke when traction pedal is pushed into fully forward
position.
13.Release
traction pedal to the neutral position, open
flow control valve on tester and shut off engine. Record
test results.
5.
Raise and support machine so all wheels are off the
ground (see Jacking Instructions in Chapter 1 -- Safety).
14.If flow is less than 25 GPM (95 LPM), consider the
following:
6.
Thoroughly clean junction of hydraulic hose and
right side fitting on bottom of traction pump (Fig. 44).
Disconnect hose from right side pump fitting.
A. The traction pump swash plate is not being ro-
tated fully (e.g. traction pedal linkage may need ad-
justment, mow speed limiter is not in the transport
position).
IMPORTANT: Make sure that the oil flow indicator
arrow on the flow meter is showing that the oil will
flow from the pump, through the tester and into the
disconnected hydraulic hose.
B. The piston (traction) pump needs to be repaired
or replaced as necessary.
7.
Install tester with pressure gauge and flow meter in
C. Make necessary repairs before performing addi-
tional tests.
series between traction pump fitting and disconnected
hose to allow flow from traction pump to tester. Use hy-
draulichosekit(seeSpecialToolsinthischapter)tocon-
nect tester to machine. Make sure that fitting and hose
connections areproperlytightened.Also,makesurethe
flow control valve on tester is fully open.
15.When
testing is complete, disconnect tester and
hose kit from pump fitting and machine hydraulic hose.
Reconnect hose to pump fitting.
CAUTION
RIGHT
FRONT
1
Allwheelswillbeoffthegroundandrotatingdur-
ing this test. Make sure machine is supported so
itwillnotmoveandaccidentallyfalltopreventin-
juring anyone near the machine.
8.
draulic leakage from tester and hose connections. Cor-
rect any leaks before proceeding.
Start engine and run at idle speed. Check for any hy-
2
3
9.
(3200
Move throttle so engine is running at high idle speed
RPM).
10.Slowly
Keep pedal fully depressed in the forward position.
push traction pedal to fully forward position.
Figure 44
1.
2.
Traction pump
RH elbow fitting
3.
Hyd hose (forward)
11.
Have second person watch pressure gauge on test-
er carefully while slowly closing the flow control valve
until 1000 PSI (69 bar) is obtained. Verify with a photo-
tac that the engine speed is still 3200 RPM.
Groundsmaster 4300--D
Page 4 -- 43
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro Groundsmaster 4300 D |
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| Language | English |
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