Assembling The Rear Brake Master Cylinder; Installing The Rear Brake Master Cylinder - Yamaha WR250R Service Manual

Obstruction → Blow out with compressed air.
1
2. Check:
Brake master cylinder kit
G
Damage/wear → Replace.
3. Check:
Master cylinder reservoir cap
G
Cracks/damage → Replace.
Brake master cylinder reservoir diaphragm
G
holder
Brake master cylinder reservoir diaphragm
G
Cracks/damage → Replace.
4. Check:
Brake hoses
G
Cracks/damage/wear → Replace.
EAS22730
ASSEMBLING THE REAR BRAKE MASTER
CYLINDER
EWA13520
WARNING
Before installation, all internal brake com-
G
ponents should be cleaned and lubricated
with clean or new brake fluid.
Never use solvents on internal brake com-
G
ponents.
Recommended fluid
DOT 4
1. Install:
Cylinder cup
New
G
Master cylinder piston
G
2. Install:
Spring "1"
New
G
Master cylinder piston "2"
G
Adjusting rod "3"
New
G
Circlip "4"
New
G
Dust boot "5"
New
G
2
New
4-32
EAS22750
INSTALLING THE REAR BRAKE MASTER
CYLINDER
1. Install:
Copper washers
New
G
Brake hoses
G
Union bolt
G
Brake hose union bolt
30 Nm (30. m•kg, 22 ft•lb)
EWA13530
WARNING
Proper brake hose routing is essential to in-
sure safe vehicle operation. Refer to "CA-
BLE ROUTING" on page 2-30.
ECA32D1002
CAUTION:
When installing the brake hose onto the
brake master cylinder, make sure the brake
pipe touch the projection "a" as shown.
2. Fill:
Brake fluid reservoir
G
Recommended fluid
DOT 4
EWA13090
WARNING
Use only the designated brake fluid. Other
G
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
REAR BRAKE
a