Piston (Traction) Pump Flow Test (Using Tester with Flow Meter and Pressure Gauge)
TO STEERING CONTROL VALVE AND CHARGE CIRCUIT
TO MOW CONTROL
(FRONT CUTTING UNITS)
TO LIFT CONTROL MANIFOLD
TO MOW CONTROL
(REAR CUTTING UNITS)
GEAR
PUMP
BYPASS
VALVE
CROSSTRAX
MANIFOLD
TESTER
PISTON
(TRACTION)
PUMP
FROM STEERING CONTROL VALVE
Figure 43
Procedure for Piston (Traction) Pump Flow Test
2. Park machine on a level surface with the cutting
decks lowered and off. Shut off engine. Make sure mow
speed limiter is in the transport position to allow full
movement of traction pedal.
This test measures piston (traction) pump output (flow).
During this test, pump load is created at the flow meter
using the adjustable load valve on the tester.
3.
tion.
Read Precautions For Hydraulic Testing in this sec-
IMPORTANT: Traction the
Groundsmaster 4300 is approximately 30 GPM
LPM).Use40GPMHydraulicTester#AT40002
circuit
flow
for
(113.5
(pressure and flow) for this test (see Special Tools
in this chapter).
CAUTION
1.
Make sure hydraulic oil is at normal operating tem-
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
perature by operating the machine under load for
approximately ten (10) minutes. Make sure the hydrau-
lic tank is full.
Hydraulic System
Page 4 -- 42
Groundsmaster 4300--D
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