Checking The Front Brake Caliper; Assembling The Front Brake Caliper - Yamaha SR400 2014 Service Manual

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a. Blow compressed air into the brake hose joint
opening "a" to force out the pistons from the
brake caliper.
EWA13560
WARNING
• Cover the brake caliper pistons with a rag.
Be careful not to get injured when the pis-
tons are expelled from the brake caliper.
• Never try to pry out the brake caliper pis-
tons.
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b. Remove the brake caliper piston dust seals
and brake caliper piston seals.
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EAS22381

CHECKING THE FRONT BRAKE CALIPER

Recommended brake component
replacement schedule
Brake pads
Piston seals
Piston dust seals
Brake hoses
Brake fluid
1. Check:
• Brake caliper piston "1"
If necessary
Every two years
Every two years
Every four years
Every two years and
whenever the brake
is disassembled
Rust/scratches/wear  Replace the brake
caliper pistons.
• Brake caliper cylinder "2"
Scratches/wear  Replace the brake caliper
assembly.
• Brake caliper body "3"
Cracks/damage  Replace the brake caliper
assembly.
• Brake fluid delivery passage
(brake caliper body)
Obstruction  Blow out with compressed air.
EWA13611
WARNING
Whenever a brake caliper is disassembled,
replace the brake caliper piston dust seals
and brake caliper piston seals.
2. Check:
• Brake caliper bracket "1"
Cracks/damage  Replace.
EAS22401

ASSEMBLING THE FRONT BRAKE CALIPER

EWA13621
WARNING
• Before installation, all internal brake com-
ponents should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake com-
ponents as they will cause the brake caliper
piston dust seals and brake caliper piston
seals to swell and distort.
• Whenever a brake caliper is disassembled,
replace the brake caliper piston dust seals
4-25
FRONT BRAKE
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