Piston (Traction) Pump Flow Test; Special Tools 5 - Toro GroundsmasterR 4300-D Service Manual

Piston (Traction) Pump Flow Test (Using Tester with Flow Meter and Pressure Gauge)
TO MOW CONTROL
(FRONT CUTTING UNITS)
TO MOW CONTROL
(REAR CUTTING UNITS)
PISTON
(TRACTION)
PUMP
Procedure for Piston (Traction) Pump Flow Test
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.
IMPORTANT: Traction
Groundsmaster 4300 is approximately 30 GPM
(113.5 LPM). Use 40 GPM Hydraulic Tester #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. Make sure the hydrau-
lic tank is full.
Hydraulic System
TO STEERING CONTROL VALVE AND CHARGE CIRCUIT
GEAR
PUMP
BYPASS
VALVE
circuit flow for
TO LIFT CONTROL MANIFOLD
TESTER
FROM STEERING CONTROL VALVE
Figure 43
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.
3. Read Precautions For Hydraulic Testing in this sec-
the
tion.
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.
Page 4 - - 42
CROSSTRAX
MANIFOLD
CAUTION
Groundsmaster 4300--D