TEST NO. 6: Reel Drive Circuit Flow
(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 engi
ne.
3. Set HOC Selector Knob, located under the instrument
panel, to position A (full speed). Make sure backlap
switch is OFF.
4. Install tester in series between pressure hose and
motor fitting on suspected bad circuit (Fig. 22). Make
sure the tester flow control valve is OPEN.
Tester Location:
Front circuit – left-front (No. 4) cutt
ing unit.
Rear circuit – left rear (No. 2) cutt
ing unit
IMPORTANT: Make sure that the oil f
low indicator
arrow on the flow gauge is showing that the oil will
flow from the valve block, through the tester and
into the motor.
5. One person should sit on the seat and operate t
he
machine while another person watches the gauges.
6. Make sure the parking brake is engaged. Start the
engine and move throttle to full speed (approx.
3200 RPM).
/
Keep
Cutting unit reels will rotate when lowered
with Enable Disable switch in ENABLE posi-
tion. away from reels during test to
prevent personal injury from rotating reel
blades. Do not stand in front of the machine.
CAUTION
7. Move “Enable/Disable” switch to ENABLE. Move
“Lower-Mow/Raise” lever forward to engage the cutting
units. While watching pressure gauges, slowly close
flow control valve until pressure specified below is ob-
tained.
TESTER READINGS:
Front
– flow not less than 3.5 GPM at 2300 PSI.
Rear – flow not less than 3.5 GPM at 1500 PSI.
8. Stop the engine. If pressure or flow is too low,
inspect
relief valve (R1 or R2) for contamination or wear. Inspect
flow control valve (VS1 or VS2) for restriction. Check
spool travel of S7. Check spool travel of S8 or S9.
Figure 22
Reelmaster
®
5100-D Page 4 - 31 Testing
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