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Reelmaster 4000–D
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Hydraulic System
TEST NO. 6: Check Reel Motor Case Drain Flow
BA
PRIORITY
OUT
IN
3000
PSI
T
B
A
TEST PORT
CUTTING
(TYP) IN
B
A
T
T
G
CIRCUIT
FROM
GEAR PUMP
FROM
LIFT CIRCUIT
TO HYDRAULIC
OIL TANK
QUART
CONTAINER
Figure 20
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. Make sure machine is parked on a level surface.
Lower cutting unit to be tested. Make sure engine is OFF
and the parking brake is engaged.
3. Read Precautions for Hydraulic Testing.
4. For the suspected bad motor, disconnect return
hose from the motor.
5. Install tester in series with the motor and return
hose. Make sure the flow control valve is fully open.
6. Follow hose from reel motor case drain to the hy-
draulic T–connector.
A. Disconnect hose from T–connector.
B. Plug T–connector to prevent drainage of fluid.
C. Put case drain hose into suitable container for
collecting case drain leakage.
7. One person should sit on the seat and operate the
machine while another person reads the tester and
measures case drain leakage. Make sure reel control le-
ver in NEUTRAL. Start engine and move the throttle to
full speed (2400 RPM).
CAUTION
Keep away from reels during test to prevent per-
sonal injury from the rotating reel blades.
8. Engage reels by positioning reel control lever to
MOW position. While watching pressure gauges, slowly
close flow control valve until a pressure of 1200 PSI is
obtained.
9. Collect hydraulic fluid for 15 seconds by putting the
case drain hose into a 1 quart container graduated in
ounces (1 liter container graduated in milliliters).
10. Disengage cutting units by reel control lever to the
NEUTRAL position. Stop the engine.
11. Measure the amount of oil collected in the container.
Divide the number of ounces collected by 32 to get gal-
lons per minute. (Divide the number of milliliters col-
lected by 250 to get liters per minute).
12. Disconnect tester from motor and hose. Reconnect
hose to the pump.
13. Remove plug from T–connector. Reconnect case
drain hose to the T–connector.
14. If flow was greater than 0.7 GPM (2.6 LPM), repair
or replace the reel motor as necessary.