Dover TWG TULSA RUFNEK 60, Руководство по обслуживанию

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7
98
3
11
2
81
81
5
6
8
9
15
7
10
19
14
18
17
17
20
13
15
12
BRAKE
PORT
52
22
16
B. BRAKE SECTION DISASSEMBLY
1. Evenly remove the four cap screws (3) that
hold the brake cover (2) in place. Spring
pressure will raise the cover up as the cover
screws are loosened. Carefully remove the
cover (2) from the brake housing (20).
Inspect the o-ring (6) for damage.
2. Remove the springs (7) from the piston (5)
and check the free height. Each spring
should measure at least 1.240 inches with
no force on them.
3. Remove the piston (5) by installing two
pieces of 3/8”-16NC all thread into the two
holes in the top of the piston and run in
evenly until the piston is clear of the
housing. An alternate way of removing the
piston is to use shop air to slowly pressurize
the brake port to remove the piston from the
brake housing (20).
4. Inspect o-rings (8, 10) and back up rings (9,
11) on the piston. Grasp the brake
driver/clutch assembly (assembled items 14,
15, 17, 18, 19) and remove it from the brake
housing.
5. Remove the stator plates (12) and friction
discs (13) from the brake housing and check
them for excessive wear, and replace if
necessary. Be sure to check the top stator
plate for scoring caused by the removal of
the piston and polish if necessary. Friction
discs should measure no less than .055-in.
thickness and stator plates should measure
no less than .068-in thickness.
6. To disassemble the brake driver/clutch
assembly, remove the retaining ring (17)
from either end of the driver. Then, remove
the brake driver (14) and bearing (15) from
the input driver. Next, remove the sprag
clutch (18). Then, remove the second
bearing (15) from the input driver.
Notice the direction of lock-up
on the clutch for re-assembly.
7. Remove the bearing housing (16) and
inspect the needle bearing (52). If
necessary, remove the retaining ring (22),
and replace.
8. If the bushing or seal in the brake housing
needs to be replaced, follow the drum
section disassembly and reassembly
sections of this manual prior to reassembly
of the brake.