Under maximum load, the motor
2. Check the condition of the gear teeth
on the screw clutch. Check the Belle-
should draw 7.5 amps. If current
ville springs and ratchet mechanism for
draw is more than this, replace the
motor. Test the motor for both di-
signs of wear.
rections of rotation.
3. Test the motor for proper operation as
follows:
4. Replace all defective parts.
ASSEMBLY AND INSPECTION. Assembly
A. Attach a ground lead from a 24 VDC
and installation are simply the reverse of
power source.
disassembly and removal. However, be-
B. Attach a power lead from the source
fore installation, check the unit for
to either the black lead or the orange
proper operation.
lead on the motor (determines direc-
tion of rotation),
After installation, see the topic "Adjust-
ment" on page 4B-1 for the proper set-
C. Introduce a load to the gear of the
ting of the clutch actuator.
motor and observe current draw.
PROBLEM
PROBABLE CAUSE
POSSIBLE REMEDY
Clutch actuator in-
1. Motor burned out.
1.
Replace the motor.
operative
2. Reduction gear
teeth
2. Replace the reduction
chipped or broken.
gear.
3. Screw clutch inoperative.
3.
Replace the screw
clutch
Table 4B-1. Clutch Actuator Troubleshooting
4B-3