Adjustments 4 - Toro 04384 Service Manual

4. Raise and support machine so front wheels are off
the ground to allow flow through the traction circuit. If
machine is equipped with 3 wheel drive, raise and sup-
port machine so rear wheel is off the ground as well.
5. Thoroughly clean junction of hydraulic hose and the
upper hydraulic fitting on the front side of the piston
pump (Fig. 20). Disconnect hose from the upper hydrau-
lic fitting.
6. Install tester with pressure gauge and flow meter in
series with the pump and the disconnected hose. Make
sure flow control valve on the tester is fully open.
7. Make sure functional lever is in the transport posi-
tion.
8. Start engine and move throttle to high idle speed
(2710 + 50 RPM).
CAUTION
The drive wheels will be off the ground and rotat-
ing during this test. Make sure machine is well
supported so it will not move and accidentally
fall to prevent injuring anyone near the machine.
9. Slowly push traction pedal into fully forward position.
10.Slowly close tester flow control valve until pressure
gauge reads 1000 PSI (69 bar).
11. Flow gauge reading for a piston pump in good condi-
tion should be approximately 13.8 GPM (52 LPM). Re-
cord test results.
12.Open control valve on tester, release traction pedal,
and turn off machine.
Greensmaster 3250--D
13.If flow was less than 12 GPM (45 LPM) or a pressure
of 1000 PSI (69 bar) cannot be obtained, consider the
following:
A. The traction pedal and/or traction speed may
need adjustment (see Traction Pedal in the Adjust-
ments Section).
B. The piston pump needs to be repaired or re-
placed as necessary.
C. Make necessary repairs before performing addi-
tional traction circuit tests.
14.If specifications are met and traction problem exists,
check wheel motor efficiency (see Wheel Motor Efficien-
cy Test in this section).
15.If testing is complete, disconnect tester from pump
fitting and hydraulic hose. Reconnect hose to pump fit-
ting.
1. Piston pump
Page 4 - - 35
1
2
Figure 20
2. Upper hydraulic hose
Hydraulic System