Checking The Rear Brake Master Cylinder; Assembling The Rear Brake Master Cylinder; Installing The Rear Brake Master Cylinder - Yamaha YFM70RY Service Manual

EAS22720
CHECKING THE REAR BRAKE MASTER
CYLINDER
1. Check:
• Brake master cylinder "1"
Damage/scratches/wear → Replace.
• Brake fluid delivery passages
(brake master cylinder body)
Obstruction → Blow out with compressed air.
2. Check:
• Brake master cylinder kit
Damage/scratches/wear → Replace.
3. Check:
• Brake fluid reservoir "1"
Cracks/damage → Replace.
• Brake fluid reservoir diaphragm "2"
Cracks/damage → Replace.
4. Check:
• Brake hoses
Cracks/damage/wear → Replace.
EAS22730
ASSEMBLING THE REAR BRAKE MASTER
CYLINDER
EWA1S3L011
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.
• Whenever a master cylinder is disassem-
bled, replace the brake master cylinder kit.
Recommended fluid
DOT 4
EAS22740
INSTALLING THE REAR BRAKE MASTER
CYLINDER
1. Install:
• Copper washers
• Brake hoses "1"
• Union bolt "2"
Brake hose union bolt
30 Nm (3.0 m·kg, 22 ft·lb)
EWA13530
WARNING
Proper brake hose routing is essential to in-
sure safe vehicle operation. Refer to "CABLE
ROUTING" on page 2-41.
ECA1S3L013
NOTICE
When installing the brake hose onto the
brake master cylinder, make sure the brake
pipe is installed between the projections "a"
and "b" as shown.
New
2
b
2. Fill:
• Brake fluid reservoir
(to the maximum level mark)
4-39
REAR BRAKE
New
a
1