Ramsey Winch H-800 DOW-LOK (JERR-DAN) User Manual

Page 6

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. Insert 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) Insert the flat, ground surface of the

cam plate and retainer plate for glaz-
ing, 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 #2 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. 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 fin-

ger tight.

TEST FOR PROPER BRAKE ASSEMBLY
After the brake has been adjusted to the
proper torque setting disengage clutch.
Start vehicle engine and run winch in the
reel in (hoisting direction). Allow winch to
run in this direction for one minute.
Place your hand on the safety brake hous-
ing. If housing is not hot to the touch then
run winch in the reverse direction (cable out)
for one minute. Brake housing should begin
to heat.
When these conditions exist, proper installa-
tion has been made. If heating becomes
noticeable when running the winch in for-
ward rotation (hoisting direction), the brake
should be again disassembled. When disas-
sembled, place the brake balls in the alter-
nate set of slots in the cam plates, then
carefully follow the instructions for re-
assembling and checking the brake.

BRAKE HOUSING

COIL SPRING

LEAF SPRING

WORM BRAKE

SCREW

MOUNTING

COVER

SCREW

ADJUSTING

DIAGRAM 1

BRAKE COVER

THREAD SEAL

JAM NUT

CAM PLATE

RETAINER PLATE

PIN

GASKET

PLATE FROM WINCH)

(LOOKING AT CAM

VIEW A-A

BRAKE DISC

COMPOSITION

BALL

HUB