TEST NO. 4: Gear Pump Section P3 Flow and Relief Valve Pressure
(Using Tester with Pressure Gauges and Flow Meter)
1.
perature by operating the machine for approximately 10
minutes.
Make sure hydraulic oil is at normal operating tem-
1
2.
the cutting units lowered and off. Make sure engine is
off.
Make sure machine is parked on a level surface with
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.
Figure 17
3.
With the engine off and cutting units lowered, install
1.
Gear Pump Section P3
tester in series between pressure hose and the gear
pump section P3 (Fig. 17). Make sure the tester flow
control valve is OPEN.
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.
engine and move throttle to full speed (3200 RPM). DO
NOT engage the cutting units.
Make sure the parking brake is engaged. Start the
5.
control valve until 1000 PSI. is obtained on gauge.
While watching pressure gauges, slowly close flow
METER READING: 4 GPM or more at 1000 PSI.
6.
If flow was lower than 4 GPM or a pressure of 1000
PSI cannot be obtained, check for restriction in pump in-
take line. If not restricted, verify relief setting first, then
remove pump and repair or replace as necessary.
7.
control valve further until the relief valve lifts.
While watching pressure gauges, slowly close flow
METER READING: 1500 +/- 50 PSI.
8.
goes beyond 1550 PSI, replace the relief valve.
Ifpressureismaintainedbelow1450PSIorpressure
9.
Stop engine. Remove tester and reinstall hoses.
Hydraulic System
Page 4 - 40
Reelmaster 6500-D/6700-D
| Categories | Lawn Mower Manual, Toro Lawn Mower Manual |
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| Language | English |
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