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