TEST NO. 5: Reel Drive 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. Lower cutting units, engage parking brake and stop
the engine.
3. With the engine off and cutting units low
ered, 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
a
rrow 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 displ
acement
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
e
ngine and move throttle to full speed (approx. 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.
TESTER READING: Flow not less than 3.5 GPM at
2000 PSI.
6. Stop the engine. If flow was lower than 3.5 GPM or a
pressure of 2000 PSI cannot be obtained, check for
restriction in pump intake line. If not restricted, remove
pump and repair or replace as necessary.
1
3
2
Figure 21
1. Pressure hose
2. Port P1
3. Port P2
Testing Page 4 - 30 Reelmaster
®
5100-D
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