13. Apply Loctite to the bolt threads. Install the left
side end housing to the center housing using the
bolts and washers. Torque the bolts 81 to 88 foot-
The compression springs should mea-
pounds (11.2 to 12.2 kgm).
sure 2.5 inches (63.5 mm) in length. If
any spring measures less than 2.375
inches (60.325 mm) all six springs
should be replaced.
1. Using the hex head bolts and washers, secure
the motor gasket and motor to the left end cover.
Set the nine springs into position on the cast
Torque the bolts 81 to 88 foot-pounds (11.2 to 12.2
sprocket of the cylinder. To facilitate assembly, ro-
tate the springs so they lean toward the center of
2. Connect the hydraulic lines to the motor and
the hoist motor control valve.
Set the piston/cylinder assembly on a wood
block about 5.0 inches (127 mm) high and with a cir-
Fill the oil into the drum and replace the oil fill
cumference less than that of the housing.
Ensure the brake cylinder is installed so
Lubricate the O-rings with clean hydraulic oil.
the vent hole will be at the top when installed
on the hoist.
Install the O-ring in the groove on the outer di-
ameter of the piston. Install the O-ring in the groove
on the brake cylinder.
Position the brake housing over the assembly,
aligning the vent hole with the top of the brake
Lubricate the piston and cylinder mating sur-
faces with a light coating of hydraulic oil.
Apply Loctite on the capscrew threads. Start the
capscrews into the piston; draw the screws into the
piston alternately until the piston face is snug
There is a small vent hole in the brake
against the brake housing.
cylinder. This vent hole must be facing
up when installed on the hoist.
Tighten the capscrews using a diametrically op-
posed sequence. Torque, in sequence, 72 to 78 foot-
Using a soft faced hammer, install the piston in-
pounds (10.0 to 10.8 kgm).
to the cylinder. Ensure the bolt holes in the end of
the brake piston are aligned so the vent hole will
face up when installed in the housing and mounted
on the hoist. Install the O-rings on the face of the
The overrunning clutch and spacer are
used to align the brake disc teeth. This
will simplify installation.
10. With the mounting face up, center the overrun-
If any one spring is damaged, all springs
ning clutch, using a spacer under the clutch to raise
should be replaced as a complete set.
the clutch flush with the housing.
The backing plate and pressure plate
11. Install the backing plate into the housing.