Gear Pump (P4) Flow Test - Toro GroundsmasterR 4300-D Service Manual

Gear Pump (P4) Flow Test

(Using Tester with Pressure Gauges and Flow Meter)
TO DECK CONTROL MANIFOLD
(FRONT CUTTING UNITS)
TO DECK CONTROL MANIFOLD
(REAR CUTTING UNITS)
PUMP (P5)
INTERNAL
CASE
DRAIN
FROM MOW CONTROL
MANIFOLD
The gear pump (P4) flow test should be performed to
make sure that the cutting deck lift circuit has adequate
hydraulic flow.
Procedure for Gear Pump (P4) Flow Test
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes.
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.
Hydraulic System
TO STEERING
CONTROL VALVE
GEAR
PUMP
Figure 53
3. Read Precautions For Hydraulic Testing in this sec-
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 - - 52
LIFT
CONTROL
MANIFOLD
CAUTION
Groundsmaster 4300--D