Disassembling The Rear Brake Caliper; Checking The Rear Brake Caliper; Assembling The Rear Brake Caliper - Yamaha YFM70RY Service Manual

EAS22630
DISASSEMBLING THE REAR BRAKE
CALIPER
TIP
Before disassembling the brake caliper, drain
the brake fluid from the entire brake system.
1. Remove:
• Brake caliper piston "1"
• Dust seal "2"
• Brake caliper piston seal "3"
1
3
2
M MMM M MMM M M MMM M
a. Turn the brake caliper piston counterclock-
wise to remove it.
EWA1S3L008
WARNING
Never try to pry out the caliper piston.
b. Remove the dust seal and brake caliper pis-
ton seal.
L LLL L LLL L L LLL L
EAS22640

CHECKING THE REAR BRAKE CALIPER

Recommended brake component
replacement schedule
Brake pads
Piston seal, dust seal Every two years
Brake hoses
Brake fluid
M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L
If necessary
Every four years
Every two years and
whenever the brake
is disassembled
1. Check:
• Brake caliper piston "1"
Rust/scratches/wear → Replace the brake
caliper piston.
• 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 passages
(brake caliper body)
Obstruction → Blow out with compressed air.
2
EWA1S3L009
WARNING
Whenever a brake caliper is disassembled,
replace the brake caliper piston seal and
dust seal.
EAS22660

ASSEMBLING THE REAR BRAKE CALIPER

EWA1S3L013
MMM
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 piston seals
to swell and distort.
• Whenever a brake caliper is disassembled,
LLL
replace the brake caliper piston seal and
dust seal.
1. Install:
• Caliper piston seal "1"
• Dust seal "2"
4-36
REAR BRAKE
1
Recommended fluid
DOT 4
New
New
3