Ramsey Winch H-930r DOW-LOK w/Air Shifter for Grant Wrecker - Manual (Page 7)

5
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".
RE-ASSEMBLING AND CHECKING THE BRAKE
1. Press brake hub into place over worm shaft and key.
2. Assemble balls in slot #2 of cam. Use stiff grease to hold balls in place and slide cam over end of worm. Be sure that
balls are secure, between cam slots and hub slots.
3. Install brake disc.
4. Install retainer plate, smooth side toward brake disc.
5. Install the gasket on the cover with a small amount of grease or sealer.
6. The coil spring goes over the adjusting screw on the inside of the cover.
7. Install the notches of the leaf spring on the pins protruding through the cover. The hollow side of the leaf spring goes
toward the brake.
8. Install brake housing cover, making sure the protruding pins go through the leaf spring and into the holes in the retainer
plate.
9. Bolt cover into place with the mounting screws. Apply Loc-tite PST #567 thread sealer to drain plug, install drain plug and
add 10 1/4 pints all purpose SAE 140 EP gear oil. Refer to Instructions for Overhaul for more information on assembling
winch.
10. Turn winch in the hoisting direction at least one turn of the input shaft.
11. Turn the adjusting screw in until it is finger tight. Tighten jam nut to lock adjusting screw.
WORM BRAKE
LEAF SPRING
COIL SPRING
BRAKE HOUSING
COVER
MOUNTING
SCREW
ADJUSTING
SCREW
DIAGRAM 1
BRAKE COVER
THREAD SEAL
JAM NUT
RETAINER PLATE
CAM PLATE
GASKET
PIN
BALL
HUB
A
BRAKE DISC
(LOOKING AT CAM
PLATE FROM WINCH)
VIEW A-A
1
2 1
2
COMPOSITION
A