Yamaha MBK MW125 2014, Service Manual

Page: 151 / 380

FRONT BRAKE
4-42
5. Check:
• Brake lever operation
Soft or spongy feeling
→
Bleed the brake sys-
tem.
Refer to “BLEEDING THE HYDRAULIC
BRAKE SYSTEM” on page 3-12.
EAS30171
REMOVING THE FRONT BRAKE CALIPERS
The following procedure applies to both of the
brake calipers.
TIP
Before removing the brake caliper, drain the
brake fluid from the entire brake system.
1. Remove:
• Brake hose union bolt “1”
• Copper washers “2”
• Front brake hose “3”
TIP
Put the end of the brake hose into a container
and pump out the brake fluid carefully.
EAS30172
DISASSEMBLING THE FRONT BRAKE
CALIPERS
The following procedure applies to both of the
brake calipers.
1. Remove:
• Brake caliper piston “1”
• Brake caliper piston dust seal “2”
• Brake caliper piston seal “3”
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Blow compressed air into the brake hose joint
opening “a” to force out the piston from the
brake caliper.
WARNING
EWA13550
• Cover the brake caliper piston with a rag.
Be careful not to get injured when the pis-
ton is expelled from the brake caliper.
• Never try to pry out the brake caliper pis-
ton.
b. Remove the brake caliper piston dust seal
and brake caliper piston seal.
▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲▲▲
EAS30173
CHECKING THE FRONT BRAKE CALIPERS
The following procedure applies to both of the
brake calipers.
1. Check:
• Brake caliper piston “1”
Rust/scratches/wear
→
Replace the brake
caliper piston.
a
3
1
2
Recommended brake component replacement
schedule
Brake pads If necessary
Piston seal Every two years
Piston dust seal Every two years
Brake hose Every four years
Brake fluid
Every two years and
whenever the brake is
disassembled
3
2
1
a