Mitsubishi 3000GT Service Manual page 920

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SERVICE BRAKES - Front Disc Brake
INSTALLATION SERVICE POINT
Using the following method, measure the drag force of the
disc brake after installation of the brake assembly.
(1) With the brake assembly removed, use a spring scale
to measure the rotary sliding resistance of the hub in
the forward direction.
NOTE
Secure the disc to the hub with wheel nuts.
(2) After installing the caliper support to the knuckle, expand
the piston by use of the special tool, and then install
MB990520
the caliper body.
MB990520
(3) Start the engine, depress the brake pedal firmly two to
three times and stop the engine.
(4) Turn the brake disc ten times in the forward direction.
(5) Using a spring scale, measure the rotary sliding resistance
of the hub in the forward direction.
(6) Obtain the drag force of the disc brake (the difference
between the values measured in 5 and 1).
Standard value: 70 N (15.4 Ibs.) or less
(7) If the drag force of the brake exceeds the standard value,
disassemble the piston and check for dirty or corroded
piston sliding surface and deteriorated piston seal.
INSPECTION
l Check disc for wear. (Refer to P.3570.)
l Check disc for runout. (Refer to P.3570, 71.)
l Check disc for damage.
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