Toro Reelmaster 5200-D Service Manual page 74

TEST NO. 5: Gear pump Efficiency
(Using Tester with Pressure and Flow Capabilities)
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
2. Make sure machine is parked on a level surface with
the cutting units lowered and off. Make sure engine is
off.
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS, and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
3. With the engine off and cutting units lowered, install
tester in series between pressure hose and valve block
fitting for suspected bad pump section (Fig. 21). Make
sure the tester flow control valve is OPEN.
Front circuit - port P1
Rear circuit - port P2
IMPORTANT: Make sure that the oil flow indicator
arrow on the flow gauge is showing that the oil will
flow from the pump, through the tester and into the
valve block.
IMPORTANT: The pump is a positive displacement
type. If pump flow is completely restricted or
stopped, damage to the pump, tester or other com-
ponents could occur.
4. Make sure the parking brake is engaged. Start the
engine and move throttle to full speed (3200 RPM). DO
NOT engage the cutting units.
5. While watching pressure gauges, slowly close flow
control valve until 2000 PSI is obtained on gauge. Verify
pump speed at 3200 RPM at the transmission input
shaft from the engine.
TESTER READING: Flow not less than 5 GPM at 2000
PSI.
6. Stop the engine. If flow was lower than 5 GPM or a
pressure of 2000 PSI cannot be obtained, check for re-
striction in pump intake line. If not restricted, remove
pump and repair or replace as necessary.
Hydraulic System
CAUTION
2
1. Port P1
Page 4 - 30
1
Figure 22
2. Port P2
Reelmaster 5200-D/5400-D