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CD5515-2/YB5515-2 SERVICE MANUAL
9-16
Published 1-20-2017, Control# 483-02
5.
Remove the bolts and nuts used to fasten the brake
mounting bracket assembly to the crane. Remove the
parking brake assembly.
6.
Separate the mounting bracket assembly
31
from the
brake assembly.
7.
Clamp the brake in a vice with soft jaws with the cover
3
in a vertical position.
NOTE:
Clamping should be done on sides of the brake, not
on machined surfaces.
8.
Remove bleeder screw
30
.
9.
Using a sharp bladed tool, carefully remove two seals
28
from housing
26
. Note the direction the seals were
installed.
10.
Loosen but do not remove four capscrews
1
. Loosen
screws evenly in the order of
A
,
B
,
C
and
D
Figure 9-27
until spring pre-load is released.
11.
Remove capscrews
1
Figure 9-26, lockwashers
2
, cover
3
and gasket
23
. Using a thin blade screw driver, remove
seal
4
from cover
3
.
12.
Remove belleville springs
5
and if present, washer
6
.
When removing the belleville springs take note of the
stacking sequence.
13.
Remove piston
9
from housing
26
bore. Remove O-ring
11
and backup ring
10
from the piston. Push rod
12
should also come out with piston
9
.
14.
Remove piston
15
from housing
26
bore. Remove O-
rings
13
and
16
and backup rings
14
and
17
from piston
15
.
15.
Remove lining and piston assembly
22
from housing
26
bore. Holding assembly on a flat surface, separate lining
20
and piston
19
by removing two flat head screws
21
.
Remove O-rings
18
from piston
19
.
16.
Loosen vice jaws and rotate the brake so that the disc
clearance slot is facing upward. Remove pan head
screws
27
, lining
25
and bushings
24
from housing
26
.
17.
Lubricate all rubber components (NOT THE BRAKE
LININGS) in clean hydraulic oil. Use the same type as
used in the hydraulic system.
18.
Clean all parts (EXCEPT LININGS) and housing bore
thoroughly with a suitable solvent and then coat them
with clean hydraulic oil of the same type used in the
hydraulic system. Keep all parts free of contaminants,
dirt and debris.
NOTE:
Coat the surfaces indicated Figure 9-26 with a
Lithium Base, E.P. No. 2 bearing grease or
equivalent.
19.
Install new lining
25
Figure 9-26 in housing
26
using new
bushings
24
and pan head screws
27
. Tighten the
screws to 2.5 - 3.3 Nm (22-28 lb-in).
20.
Install new lining
20
on piston
19
using new flat head
screws
21
. Tighten screws to a torque of 3.4 - 4.5 Nm
(30-40 lb-in). Install new O-rings
18
on piston
19
and
insert lining and piston assembly
22
into housing
26
bore.
21.
Carefully install two new seals
28
in housing
26
. Be sure
to install the seals the same direction as they were
removed.
22.
Install bleed screw
30
. Tighten to a torque of 12.2 - 20.3
Nm (9-15 lb-ft).
23.
Install new O-rings
13
and
16
and new backup rings
14
and
17
on piston
15
. Be sure they are installed in the
correct order.
24.
Install piston
15
into housing
26
bore. Be sure piston is
installed in the correct direction. Be careful not to pinch
the O-rings on the inlet ports.
25.
Install new backup ring
10
and new O-ring
11
on piston
9
. Be sure they are installed in the proper order. Install
push rod
12
in bore of piston
9
. Install piston into
housing
26
bore.
26.
Fully lubricate the threads of adjusting screw
7
and lock
nut
9
and install into cover
3
.
27.
Install washer
6
, if used, and new belleville springs
5
over end of piston
9
. Follow the stacking sequence
Figure 9-28.
WARNING
Cap (3) is under spring pressure. Use care when
removing the cap to prevent personal injury.
FIGURE 9-27
a0783
Reference Only
Содержание Grove YB5515-2
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