Ramsey Winch H-800 W/AIR SHIFTER (TALBERT) User Manual
Page 5
WORM BRAKE MAINTENANCE
ADJUSTMENT
The oil cooled, fully adjustable, automatic worm brake operates in the worm housing lubricant, all parts being sub-
merged 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 tub-
ing, 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 the 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-800 Dow-Lok®
should be 50 to 55 ft-lbs. 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.
DIS-ASSEMBLY
1. Remove the drain plug and drain the worm gear oil from the gear 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 which slots balls are in.
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. Otherwise replace cam plate or retainer plate.
c) Inspect the leaf spring. It should be bowed 1/8". Replace leaf spring if flattened.
ADAPTER
CAP
NUT
TUBING
SOCKET
5