Caliper Assembly - Honda CB350 Repair Manual

134 CHASSIS
3. Using a 10 mm socket, loosen the
adjuster screw locknut. With a small
screwdriver turn the adjusting screw
clockwise until the wheel rotates freely,
then rotate the adjusting screw coun—
terclockwise until the fixed pad (pad B)
just contacts the disc.
4. Turn the adjusting screw another
V—1 turn clockwise so that there is a
small clearance between pad B and the
disc. Tighten the locknut.
CALIPER ASSEMBLY
Removal and Disassembly
NOTE: A compressed air supply will
be necessary to remove the piston from
the caliper.
1. Remove the front wheel.
2. Disconnect the hydraulic brake line
from the caliper, and fit the rubber cap
from the bleeder valve onto the end of
the brake line to prevent dirt from enter—
ing the system.
3. Remove the caliper adjusting screw
locknut from the adjusting screw and un—
screw the adjusting screw from the right—
side. Remove the adjusting screw spring.
Caliper mounting bolts (1 and 2), and adjusting
screw (3)
4. Remove the three mounting bolts
which secure the caliper pivot arm to the
left fork slider. Remove the mud guard
and the caliper assembly. The pivot shaft
can be pulled from the pivot arm.
NOTE: The two caliper halves can be
removed from the pivot arm and disas—
sembled without removing the pivot
arm or the front wheel. To remove the
caliper halves in this manner, see the
section under "Pad Replacement."
5. To disassemble the caliper, remove
the two setting bolts from the caliper and
separate the two caliper halves from the
caliper pivot arm. Remove the two pads
as described under "Pad Replacement."
6. Remove the piston from caliper A
by blowing compressed air into the fluid
inlet passage.
Removing caliper piston (2), from caliper A (1), by
blowing compressed air into the fluid inlet passage
7. The piston seal can be removed
from caliper A using a wood or plastic
tool. However, note that if the cylinder
walls are scored while removing the seal,
the caliper half will have to be replaced.
Inspection
1. Check pad wear. If either pad is
worn past the red limit line, it must be re—
placed.
2. Measure the inside diameter of the
caliper cylinder bore and the outside di—
ameter of the piston. Compare the mea—
sured value with the service limit given
at the end of this chapter; if either part is
worn beyond its service limit, it must be
replaced.
3. Check the bore in Chapter A for
scoring. If scoring is evident, the caliper
half should be replaced.
4. Check the piston for scoring; re—
place it if scoring is evident.
5. Check the pivot shaft for wear, also
check the pivot arm for wear at the pivot
points. Replace as necessary.
6. Check the condition of the two pivot
shaft O—rings. If they are torn or cracked
they should be replaced with new ones.
Assembly and Installation
Since it is imperative that no dirt or
foreign matter be allowed to enter the
hydraulic system, assembly should take
place in a clean area preferably on a sheet
of white paper.
Clean and lubricate all internal brake
parts with fresh DOT 3 brake fluid before
assembly.