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Brake Cylinder Pressure Test
Connect a hydraulic hand pump with an accurate gauge
and shut-off valve to the brake release port. Apply 500
PSI (3,450 kPa) to the brake. Close the shut-off valve and
let stand for five minutes. If there is any loss of pressure,
the brake cylinder should be disassembled for inspection
of the sealing surfaces and O-rings.
WHILE PRESSURE IS APPLIED AND THE BRAKE IS
RELEASED, install the sprag clutch assembly. Rotate
the sprag clutch back and forth to align the splines in all
brake discs before pushing into the brake cylinder bear-
ing. Leave the sprag clutch installed if proceeding with
assembly of the hoist drive.
55
52
53
Item No
25
26
27
28
30
31
34
52
27
28
30
31
59
62
Description
FRICTION DISC
BRAKE DISC
BACK-UP RING
O-RING
O-RING
BACK-UP RING
MOTOR SUPPORT
SPRING STOP
25
26
Qty
Item No
Description
7
53
RETAINING RING
8
55
SPRING
1
59
BRAKE PISTON
1
62
SPRING SPACER
1
44
RETAINING RING
1
58
BALL BEARING
1
54
RELIEF VALVE
1
26
34
58
44
54
Qty
1
18
1
1
1
1
1
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