Procedure for Reel Motor Efficiency: Case Drain
Test:
1
1.
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
2
2.
Park machine on a level surface with the cutting units
lowered and off. Make sure engine is off and the parking
brake is engaged.
3.
Read Precautions for Hydraulic Testing.
NOTE: The reel motors are connected in series. To iso-
late a faulty motor, you may have to test all three motors
in the circuit by starting with the upstream motor first.
Figure 26
1.
1.
1.
Case drain (right motor)
2.
Hydraulic T−fitting
4.
For the suspected bad motor, disconnect return hose
from the motor (Cross Over Relief Test Fig. 30 and 31).
1
5.
Install tester in series with the motor and discon-
2
nected return hose. Make sure the tester flow control
valve is fully open.
6.
Make sure backlap knob on the hydraulic manifold is
in the mow position and reel speed is set to maximum.
7.
Disconnect hose from case drain at the bulkhead T−
fitting (Fig. 26, Fig. 27, and 28). Plug the T−fitting. Put
case drain hose into suitable container for collecting
case drain leakage.
Figure 27
Case drain (left motor)
2.
Hydraulic T−fitting
8.
One person should sit on the seat and operate the
machine while another person reads the tester and
measures case drain leakage. Make sure traction pedal
is in NEUTRAL. Start engine and move the throttle to full
speed (2650 + 50 RPM).
2
CAUTION
1
Keep away from reels during test to prevent per-
sonal injury from the rotating reel blades.
Figure 28
9.
Engage reels by positioning the cutting unit drive
Case drain (rear motor)
2.
Hydraulic T−fitting
switch to the ENGAGE position. While watching pres-
sure gauges, slowly close flow control valve until a pres-
sure of 1200 PSI is obtained.
13.If flow was greater than 0.7 GPM (2.6 LPM), repair
or replace the reel motor as necessary.
10.Collect
case drain hose into a 1 quart container graduated in
ounces (1 liter container graduated in milliliters).
hydraulic fluid for 15 seconds by putting the
14.Disconnect tester from motor and hose. Reconnect
hydraulic hoses.
15.Repeat
test with other motors as needed.
11.
Stop cutting units by positioning the cutting unit drive
switch to the DISENGAGE position. Stop engine.
12.Measure
amount of oil collected in the container. Di-
vide number of ounces collected by 32 to get gallons per
minute (Divide number of milliliters collected by 250 to
get liters per minute).
Reelmaster 3100−D
Hydraulic System (Rev. C)
Page 4 − 47
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