Greensmaster 3250--D Hydraulic SystemPage 4 -- 3 5
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).Disconnecthosefromtheupperhydrau-
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 drivewheelsw ill be off theground and rotat-
ing during this t est. Make sure machine is well
supported so it will not move and accidentally
fall to prevent injuring anyone near the machine.
9. Slowlypushtraction pedal into fully forwardposition.
10.Slowly close tester flow control valve until pressure
gauge reads 1000 PSI (69 bar).
11.Flowgaugereading for a piston pumpin goodcondi-
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.
13.Ifflowwas lessthan12 GPM(45LPM)orapressure
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.Thepistonpumpneedstoberepairedorre-
placed as necessary.
C. Make necessary repairs before performing addi-
tional traction circuit tests.
14.If specifications are m et and traction problemexists,
checkwheelmotorefficiency(seeWheelMotorEfficien-
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 2. Upper hydraulic hose
Figure 20
2
1
Hydraulic
System
To Next Page
Loading...
