SM 1962 4-00
4
Brake Parts - Brake Parts - Rear
Section 165-0010
7. Inspect brake pads (4) per Step 1 in 'General
Inspection' procedure.
8. Clean torque plate (16) making sure no solvent
remains in fluid passages or grooves. Inspect boot
(12) and seal (10) grooves, and land areas between
grooves for damage or cracks. Minor nicks and
scratches may be blended with crocus cloth. Replace
torque plate (16) if corrosion is excessive or boot
(12) and seal (10) grooves are damaged, prohibiting
proper rebuild of the brake head.
9. Inspect pistons (11) for minor scratches and nicks
and blend with crocus cloth. If piston (11) is badly
nicked or scratched, or if the chrome plate is worn
off, replace piston (11).
10. Torque pins (3 & 5) that are deeply grooved
should be replaced.
ASSEMBLY
Numbers in parentheses refer to Fig. 2, unless
otherwise specified.
1. Lubricate seals (10), packings (13) and pistons
(11) with grease provided in seal kit or automotive
brake fluid (SAE J 1703) or castor oil. Do not use
petroleum type oils or lubricants.
2. Install backup rings (14), packings (13) and boots
(12) in torque plate (16) piston bores. Lubricate per
Step 1.
3. Install pistons (11) in torque plate (16) as follows:
Position lubricated piston (11) into boot (12) and piston
bore, holding piston at a slight angle. Insert forefinger
between piston (11) and boot (12) and rotate forefinger
around outside diameter of piston (11), lifting inside
diameter of boot (12) over outside diameter of piston
(11). Make sure outside diameter lip of boot (12) remains
in the groove in piston (11) bore.
4. After piston (11) is through boot (12), centre piston
by feel over packing (13). Apply by hand, a turning
thrusting pressure, working piston (11) into and
through packing (13).
5. When assured pistons (11) are through packings
(13), pressure other than hand pressure may be used
to press pistons the remainder of the way into the
piston bores. Snap open end of boot (12) into groove
of piston (11).
6. Lubricate seals (10) and install seals and piston
plugs (9) in open end of piston bores of torque plate (16).
7. Attach cover plate (8) to torque plate (16) and
secure with bolts (6) and washers (7). Tighten bolts (6)
to a torque of 380 Nm (280 lbf ft).
8. When installing torque pins (3 & 5) and bolts (2)
make sure the groove in the pin is directly under the
bolt so the bolt can perform its locking and retaining
function.
Note: Lubricate torque pins (3 & 5) with a corrosion
resistant lubricant prior to installation to facilitate next
pin removal.
9. Inspect brake disc (2, Fig. 1), if worn, per
instructions under 'General Inspection' in this section.
Refer to Section 160-0030, AXLE GROUP (HUB) for
brake disc replacement instructions.
INSTALLATION
Numbers in parentheses refer to Fig. 1, unless
otherwise specified.
WARNINGS
To prevent personal injury and property
damage, be sure wheel blocks, blocking
materials and lifting equipment are properly
secured and of adequate capacity to do the job
safely.
To prevent personal injury and property
damage, the procedure for installing tyre and
rim assembly described in Section 160-0050,
WHEEL RIM AND TYRE, must be strictly followed.
1. Install washers (5) on bolts (4).
2. Position brake head (3) over brake disc (2) on
brake mounting plate, aligning bolt holes. Install
assembled bolts (4) and washers (5) through
mounting plate and into torque plate. Tighten bolts (4)
to a torque of 510 Nm (380 lbf ft).
Note: Make sure torque pins (3 & 5, Fig. 2) do not
touch brake disc (2). If they do, loosen bolts (2, Fig.
2) and adjust pins to clear disc by 1.5 - 3.0 mm
(0.06 - 0.12 in). Check to make sure that bolt (2, Fig. 2)
fully engages in pin groove and tighten bolt (2, Fig. 2)
to a torque of 30 - 38 Nm (22 - 28 lbf ft).
3. Attach hydraulic inlet lines at brake head
assembly.
4. Install wheel on the vehicle following instructions in
Section 160-0050, WHEEL RIM AND TYRE.
Courtesy of Machine.Market
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