Ramsey Winch 800/H-800 DOW-LOK - Manual (Page 7)

5
SERVICING OF THE 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 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.
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 appropriate slots of cam. Use stiff grease to hold balls into place and slide cam over end of worm.
Be sure that balls are secure, between cam slots and hub slots. See instructions at right to determine proper ball slot
setting. Install brake disc.
3. Install retainer plate, smooth side toward brake disc.
4. Install the gasket on the cover with a small amount of grease or sealer.
5. The coil spring goes over the adjusting screw on the inside of the cover.
6. 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.
7. Install brake housing cover, making sure the protruding pins go through the leaf spring and into the holes in the retainer
plate.
8. Bolt cover into place with the mounting screws. Install drain plug and add 3-3/4 pints all purpose E.P. 140 oil.
9. Turn winch in the hoisting direction at least one turn of the input shaft.
10. Turn the adjusting screw in until it is finger tight.
BALL
HUB
A
BRAKE DISC
(LOOKING AT CAM
PLATE FROM WINCH)
VIEW A-A
1
2 1
2
COMPOSITION
A
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