SM 1967 4-00
Parking Brake - Parking Brake and Mounting
Section 170-0010
4
Note: Care should be taken not to push piston seal (5)
out of seal groove in calliper (7) when assembling cap
assembly (25), with piston (6) and power screw shaft
(21), to calliper (7).
7. Install new packing (20), wave spring washer (18)
and washer (19) over power screw shaft (21), in the
order as shown in Fig. 2.
8. Mount actuator (15) on cap assembly (25) and
secure with nuts (12), lockwashers (13) and washers
(14). Tighten nuts (12) finger tight only at this stage.
9. Apply coat of grease (Lubriplate Aero or equivalent)
to mounting spline of slack adjuster (17).
10. With adjusting screw facing away from actuator
(15) slide slack adjuster (17) onto power screw shaft
(21) aligning slack adjuster (17) arm with clevis (8).
11. Install snap ring (16) on power screw shaft (21).
12. Remove nuts (12), lockwashers (13) and washers
(14) securing actuator (15) to cap assembly (25).
Remove actuator (15) from cap assembly (25) to aid in
'Installation'.
INSTALLATION
Numbers in parentheses refer to Fig. 1, unless
otherwise specified.
Note: Tighten all fasteners without special torques
specified, to standard torques listed in Section
300-0080, STANDARD BOLT AND NUT TORQUE
SPECIFICATIONS.
WARNING
To prevent personal injury and property
damage, be sure wheel chocks, blocking
materials and lifting equipment are properly
secured and of adequate capacity to do the job
safely.
1. If removed, install brake disc (1) on mounting flange
and secure with bolts (3) and lockwashers (2). Torque
tighten bolts (3) to 49 Nm (36 lbf ft).
2. Install torque plate (7) on rear frame mounting
bracket and secure in place with bolts (4), washers (5),
blocks (18 & 19) and nuts (6). Torque tighten nuts (6)
to 278 Nm (205 lbf ft).
3. Using suitable lifting device, position brake calliper
(14) assembly in position on torque plate (7). Install
torque plate (8) on brake calliper (14) and secure to
rear frame mounting bracket with bolts (4), washers
(5) and nuts (6). Torque tighten nuts (6) to 278 Nm
(205 lbf ft).
4. Re-mount actuator (17) on cap assembly (25, Fig. 2)
and install washers (14), lockwashers (13) and nuts
(12). Tighten nuts (12) finger tight at this stage.
5. Reconnect air line to actuator (17)
6. Place brake control lever in the 'RELEASE' position
to retract actuator (17) cylinder when engine is started.
Ensure drain cocks on air tanks are closed, start the
engine and build up air pressure in the air tanks.
7. Connect slack adjuster (16) to actuator (17) by
inserting clevis pin (9, Fig. 2) through clevis
(8, Fig. 2) on actuator (17). Secure clevis pin
(9, Fig. 2) with cotter pin (10, Fig. 2).
8. Align actuator (17) to slack adjuster (16) and tighten
nuts (12) securely.
9. Rotate slack adjuster (16) adjusting screw until
brake pads (15) in brake calliper (14) head assembly
are tight against brake disc (1). Back off adjusting
screw on slack adjuster (16) until a total clearance of
1 - 1.5 mm (0.04 - 0.06 in) is obtained. The parking
brake is now operational.
10. If fitted, install parking brake guard (10) to
mounting brackets and secure in place with bolts (11),
lockwashers (13) and nuts (12). Torque tighten nuts
(12) to 153 Nm (113 lbf ft).
MAINTENANCE
Brake Pad Replacement
Replace brake pads when lining thickness is 3 mm
(0.12 in) or less.
1. Remove calliper head assembly as described under
'REMOVAL'.
2. Replace worn brake pad and carrier assemblies.
3. Install calliper head assembly and adjust slack
adjuster as described in 'Installation'.
Courtesy of Machine.Market
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