Test No. 5: Gear Pump Section P1 & P2 Flow - Toro Reelmaster 6500-D Service Manual

TEST NO. 5: Gear Pump Section P1 & P2 Flow
(Using Tester with Pressure and Flow Capabilities)
Over a period of time, the gears and wear plates in the
pump can wear. A worn pump will by-pass oil and make
the pump less efficient. Eventually, enough oil can by-
pass to cause the reels to stall in heavy cutting condi-
tions. Continued operation with a worn, inefficient pump
can generate excessive heat and cause damage to
seals and other components in the hydraulic system.
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.
CAUTION
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 reel man-
ifold fitting or between pressure hose and pump fitting
(Fig. 18) for suspected pump section. Make sure the
tester flow control valve is OPEN.
FRONT CIRCUIT: Pump Section P1
REAR CIRCUIT: Pump Section 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 the
tester flow control valve until 2000 PSI is obtained on
gauge.
METER READING: 7 GPM or more at 2000 PSI.
Reelmaster 6500-D/6700-D
2
1. Gear Pump Section P1
2. Gear Pump Section P2
6. Stop the engine. If flow was lower than 7 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.
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Figure 18
Hydraulic System