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If the brake disc is seized,
install M8 ×
1.25 bolts as shown, and remove the
disc by tightening the bolts evenly and gradually.
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1.In order to measure the
brake drag torque, measure the hub torque with the pads
removed
by the following procedure.
Use a spring balance to
measure the hub torque in the forward direction. Record hub
torque
with pads removed.
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2.
| caution |
Do not let any oil, grease or
other contamination get
onto the friction surfaces of the pads and brake
discs.
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After re-installing the caliper support to the
backing plate, install the pad clips and
the pads to the caliper support.
Clean the piston and
insert into cylinder with special tool disc brake piston
expander
(MB990520).
3.Be careful that the piston boot does
not become caught, when lowering the caliper
assembly and installing the lock pin. Tighten the lock pin
to the specified torque.
Tightening torque: 44
±
5 N·m
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1.Check the brake drag force
as follows.
(1)
Start the engine and hold the brake pedal down for 5
seconds. (Pedal depression force: approximately
200 N)
(2)
Stop the engine.
(3)
Turn the brake disc forward 10 times.
(4)
Use a spring balance to measure the hub torque with pads
installed in the same direction
as earlier.
(5)
Calculate the drag force of the disc brake [difference
between hub torque
with pads installed and hub torque with pads
removed].
Standard value: 68 N or
less
2.If the brake drag force exceeds the
standard value, disassemble and clean the piston.
Check for corrosion or worn piston seal, and check the
sliding condition of the lock pin and
guide pin.
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