SM 1962 4-00
Section 165-0010
3
Brake Parts - Brake Parts - Rear
BRAKE REMOVAL AND DISASSEMBLY
Numbers in parentheses refer to Fig. 2, 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 removing tyre and
rim assembly described in Section 160-0050,
WHEEL RIM AND TYRE, must be strictly
followed.
1. Position the vehicle in a level work area, apply the
parking brake and switch off the engine.
2. Block all road wheels, except the wheel to be
removed, and place the battery master switch in the
'Off' position.
3. Remove wheel from the machine following
instructions in Section 160-0050, WHEEL RIM AND
TYRE.
4. Remove hydraulic fluid inlet line at brake head
assembly. Plug line and brake head to prevent
ingress of dirt.
5. Remove bolts (4, Fig. 1) and washers (5, Fig. 1)
from mounting at axle housing and remove brake
head assembly to a clean working area.
WARNING
Hydraulic fluid may cause irritation. Avoid
skin and eye contact with fluid.
6. Disassemble brake head assembly in sequence of
index numbers in Fig. 2. Items (1, 2 & 3) may be left in
torque plate (16) when servicing packings (13), seals
(10), backup rings (14), and boots (12) if desired.
Note: Repair kits are available which include new
boots (12), backup rings (14), packings (13) and
seals (10), in quantities sufficient to rebuild a calliper
brake head. Refer to vehicle parts book for repair kit
part number. All parts included in a repair kit should
be replaced each time a brake head is rebuilt.
attach a bleeder hose to bleeder valve. Open bleeder
valve (1). Use a screwdriver or pry bar inserted
between brake disc (2, Fig. 1) and brake pads (4) to
press pistons (11) back as far as possible, into the
piston bores of torque plate (16). Close bleeder valve.
7. Rotate brake pads (4) out of the opened end of
torque plate (16).
8. Install new brake pads (4) by placing friction
material next to the disc and rotating into position in
torque plate (16).
9. Push the two unlocked pins (3) towards the disc.
10. Thread the two loosened bolts (2) in until bolts
seat in grooves of torque pins (3). This can be
checked by limited axial movement of pins as the
bolts are being seated. Tighten bolts (2) to a torque of
30 - 38 Nm (22 - 28 lbf ft).
Note: Make sure torque pins (3 & 5) do not touch
brake disc (2, Fig. 1). If they do, loosen bolts (2) and
adjust torque pins to clear disc by 1.5 - 3.0 mm
(0.06 - 0.12 in). Check to make sure that bolts (2)
fully engage in torque pin grooves and retighten bolts.
11. Pump brake pedal until brake pads (4) contact
brake disc (2, Fig. 1).
12. When new brake pads are installed on a machine,
the brake pad friction material should be burnished in
accordance with the following procedure to achieve
maximum braking performance:
a. Drive vehicle at 8 - 30 km/h (5 - 20 mile/h) with
brakes applied at just enough pressure to produce a
noticeable drag. Heavy smoke and foul odour from
the brake pad friction material is normal during this
procedure.
b. Continue cycle until the brake disc achieves a
temperature of 315° - 370°
C (600°
- 700°
F). A
surface pyrometer applied to the disc after stopping
will determine temperature.
c. Permit disc to cool to less than 95°
C (200°
F).
d. Repeat Steps a and b.
e. Allow brake to cool to within 10°
C (50°
F) of
ambient temperature.
f. Repeat Steps a and b until full braking performance
(per applicable government regulations) is achieved.
Courtesy of Machine.Market
To Next Page
Loading...
