Gear Pump (P3) Flow Test - Toro GroundsmasterR 4300-D Service Manual

Gear Pump (P3) Flow Test

(Using Tester with Pressure Gauges and Flow Meter)
TO MOW CONTROL
(FRONT CUTTING UNITS)
TO MOW CONTROL
(REAR CUTTING UNITS)
PISTON
(TRACTION)
PUMP
The gear pump (P3) flow test should be performed to
make sure that the traction charge circuit and steering
circuit have adequate hydraulic flow.
Procedure for Gear Pump (P3) Flow Test
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes.
Hydraulic System
TO STEERING CONTROL VALVE AND CHARGE CIRCUIT
TO LIFT CONTROL MANIFOLD
GEAR
PUMP
BYPASS
VALVE
TESTER
FROM STEERING CONTROL VALVE
OIL FILTER
AND TUBE
REMOVED
Figure 39
2. Park machine on a level surface with the cutting
decks lowered and PTO switch off. Make sure engine is
off. Apply the parking brake.
3. Read Precautions For Hydraulic Testing in this sec-
tion.
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CROSSTRAX
MANIFOLD
Groundsmaster 4300--D