Ramsey Winch H-930R DOW-LOK w/Air Shifter for Szummar - Manual (Page 7)

ADJUSTING THE OIL COOLED WORM BRAKE
The oil cooled, fully adjustable, automatic worm brake operates in the worm housing lubricant, all parts being submerged in oil.
When the brake wears to the point that the load begins to drift, the brake can be adjusted as follows:
1. Loosen the adjusting screw lock nut.
2. Tighten the brake by turning the adjusting screw clockwise. CAUTION: Only 1/4 turn is usually required to adjust the brake.
Over-tightening can cause over-heating, and damage to the brake parts. Tighten the lock nut after adjustment is completed.
If the brake does not respond to adjustment then a new leaf spring and brake disc is needed.
A torque wrench can be equipped with a special adapter to
fit the input shaft (worm) of the winch. The adapter can be
made by welding a nut to the end of a piece of tubing as
shown in the following figure.
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
brake on the Model H-930R Dow-Lok should be 65 to 75
ft. lbs. (90-100 Nm) If torque wrench does not show the
proper value as it turns, then the worm brake adjusting 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.
SERVICING OF THE OIL COOLED WORM 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.
6. Inspect parts as follows:
a) Composition brake discs are 1/4" thick when new. Replace if thinner than 3/16” or if surfaces are glazed or burnt.
b) Inspect the flat, 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".
5
ADAPTER
CAP
NUT
TUBING
SOCKET