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Elliott Digger Derrick - SERVICING THE MOTOR

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9
SERVICING THE MOTOR
1. Tag hoses for proper re-installation and remove them from the motor and counterbalance
block.
2. Remove the counterbalance block from the winch motor.
3. Remove the counterbalance valve from the counterbalance block and inspect the small
metering hole located on the side of the cartridge valve to make sure it is not obstructed (See
Fig. 5). Also, inspect the O-rings to insure that they are not cut or flattened. Replace if
necessary.
4. Units with geroler type motors have only one external line. Pilot pressure to operate the
brake valve is obtained from inside the counterbalance block.
5. On units with gear motors, remove the large fitting (Item 38-12) with the pilot line in it and
inspect the check valve (Item 38-11) to make sure it is seating properly (See Fig. 8). The
check valve should be installed so that the arrow on the side is pointed in toward the center
of the valve, not out toward the large fitting.
6. Motors and counterbalance valves are not serviceable in the field. Return them to an
authorized dealer for service.
Fig. 5
Fig. 6
Fig. 7 Fig. 8

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