Ramsey Winch DC-300 RAM-LOK User Manual
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5
SERVICING OIL COOLED SAFETY BRAKE
1. Remove the drain plug and drain the worm gear oil from the worm housing.
2. Back off the lock nut, then the adjusting screw, both two turns or more by turning them counter
clockwise.
3. Remove the cover mounting screws.
4. Remove the cover along with coil spring and leaf spring.
5. Remove the retainer plate, composition brake disc, cam plate and balls. Note slots balls are in.
6. Inspect parts as follows:
a). Composition brake discs are 1/8” thick when new. Replace if thinner than 0.080” or if
surfaces are glazed or burnt.
b).
Inspect
the
fl at, ground surface of the cam plate and retainer plate for glazing, warpage, or
other damage. Glazing can be removed by scraping carefully.
c). Inspect the leaf spring. It should be bowed 1/8”.
After welding the cap and nut to the tubing, slot the tubing as shown. This will allow the special
adapter to slide over the keyway and will then act as a large socket. A torque wrench can then be
used to apply the proper torque. Turn the torque wrench so that the drum turns in the spool out
direction or lowering direction. The torque rating for the Model 300/346 should be 9 to 15 ft. lbs.
If the torque wrench does not show the proper value as it turns, then the worm brake adjust-
ing bolt should be turned clockwise 1/4 turn. Each time the adjusting bolt is turned, check the
torque reading. Continue this procedure until the proper torque reading is achieved. Then tighten
the lock nut.