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Maintenance, Service, and Repair
REAR BRAKE - AXLE TA267
Service Limits:
Brake pad Thickness: 1/16" (1.6 mm)
Rotor Thickness: 0.826" (21 mm)
Rotor runout: 0.005 inches (0.127 mm).
It is recommended that if a wearable component is replaced
on one side of a vehicle, the same components should be
replaced on the other side of the vehicle.
Brake Disassembly:
1. Make sure the ignition switch is in the "OFF"
position, then remove the key.
2. Place the shift lever in the "park" or "neutral"
position.
3. Set the park brake.
4. Place blocks under the front wheels to prevent
vehicle movement.
1.
Remove pad pins.
2.
Remove caliper from mounting fixture.
3.
Discard worn stator pads.
4.
Remove boot and piston from the housing at the same
time. Do so by holding the brake against a table surface
with the piston facing down and slowly applying air
pressure to the inlet port. Once the piston is out of the
housing, tilt the piston to one side and pry the boot out of
the housing. Discard these pieces only if you are
rebuilding.
5.
Remove the square-ring from the cylinder of the housing.
6.
Inspect housing bore. It must be clean and rust free. If
rust is present, use emery or crocus cloth to remove. The
square-ring seals against the piston surface. So small
scratches and cavities in the bore wall will not affect sealing
performances. However, since the bore guides the piston
movement, any cylinder wall imperfection, which causes
the piston to catch or wedge in the bore must be taken
care of. If the piston cannot be properly guided in the bore,
replace the brake
7.
Clean all ports and mounting surfaces. Wash housing in
a solvent to remove any dirt, loose rust, and any petroleum
products.
8.
Inspect bushing in slide mount for signs of wear. Replace
as necessary
9.
Inspect all other parts for unusual wear or rust. Clean or
replace as necessary.
Brakes: MT-030-60-C
Page 4
Inspection
The brake pads must be removed from the caliper for
inspection. Refer to the Brake Disassenbly procedure to
remove the pads from the caliper.
Measure the thickness of the brake linings. If the brake lining
is equal to or less than the service limit then the linings should
be replaced.
Measure the rotor in a minimum of 3 places around the rotor.
If any measurement is less than the service limit, then the
rotor must be replaced.
Mount a dial indicator and measure the rotor runout on the
inside and outside surfaces. If the runout exceeds the service
limit, then the rotor must be machined. After machining, confirm
that the rotor thickness is not less than the service limit.
Brake Assembly
Important: there may be more parts in a service kit than your
brake requires. Check the parts list carefully for the exact
quantity.
Note:
All parts must be thoroughly cleaned prior to
assembly.
1.
Insert rubber rings and sleeves.
2.
Lubricate sleeves with a high temperature grease before
assembly.
3.
Lubricate the cylinder of the housing, square-ring, the boot,
and piston with brake fluid before reassembly.
4.
Install the square-ring in the groove in the cylinder bore
furthest from the opening.
5.
Install a boot onto the piston. The small opening of the
boot is to be seated in the groove on the front side of the
piston. Pull the boot over the full length of the piston and
extend the boot beyond the end of the piston about 1/4
inch. Start the boot lip into the cylinder groove. Use a vice
or shop press to slowly move the piston into the cylinder
until the piston bottoms out. Verify that the boot has
properly seated in the cylinder bore groove
Installation
1.
Slide the brake over the rotor with one pad on each side
of rotor.
2.
Align mounting sleeve holes in caliper with mounting holes
in mounting bracket.
3.
Insert pad pins and torque to 30-40 ft. Lbs.
4.
Attach brake line using M10 x 1.5 banjo port.
5.
Bleed the brake system.
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