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1.Use a spring balance to
measure the hub rotation resistance by turning the hub to
the
forward direction with the pad removed in order to measure
the brake dragging force.
2.
| caution |
Do not contaminate the
friction surfaces of the pads and brake discs by
any oil or grease.
|
Install the caliper support to the knuckle, and then
assemble the pad clip and the pad
to the caliper support.
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3.Clean the piston and
insert into cylinder with special tool disc brake piston
expander
(MB990520).
4.Be careful that the piston boot does
not become caught, when lowering the caliper
assembly and install the guide pin to the
caliper.
5.Start the engine, and then depress the
brake pedal two or three times with the force
of approx. 100 N. Then stop the engine.
6.Turn the
brake disc forward 10 times.
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7.Use a spring balance to
measure the rotary-sliding resistance of the
hub.
8.Calculate the drag force of the disc brake
[difference between the values
measured at steps 1 and 7].
Standard
value: 86 N
9.If that drag force exceeds
the standard value, disassemble the piston assembly. Then
check the piston for contamination or rust, and confirm if
the piston or the piston seal is
deteriorated, and if the lock pin and the guide pin slide
smoothly.
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<Except
vehicles without ABS> or 