Checking The Brake Master Cylinder; Checking The Brake Pipes; Installing The Brake Master Cylinder - Yamaha Wolverine YX70EPNG Service Manual

4. Fill:
• Brake master cylinder reservoir
(with the specified amount of the specified
brake fluid)
Specified brake fluid
DOT 4
EWB02880
WARNING
• Use only the designated brake fluid. Other
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
brake performance.
• Refill with the same type of brake fluid that
is already in the system. Mixing brake fluids
may result in a harmful chemical reaction,
leading to poor brake performance.
• When refilling, be careful that water does
not enter the brake master cylinder reser-
voir. Water will significantly lower the boil-
ing point of the brake fluid and could cause
vapor lock.
ECB01320
NOTICE
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
5. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-19.
6. Check:
• Brake fluid level
Below the minimum level mark → Add the
specified brake fluid to the proper level.
Refer to "CHECKING THE BRAKE FLUID
LEVEL" on page 3-18.
7. Check:
• Brake pedal operation
Soft or spongy feeling → Bleed the brake sys-
tem.
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM" on page 3-19.
EBS30097
CHECKING THE BRAKE MASTER
CYLINDER
1. Check:
• Brake master cylinder
Damage/scratches/wear → Replace.
• Brake fluid delivery passages
(brake master cylinder body)
Obstruction → Blow out with compressed air.
FRONT AND REAR BRAKES
2. Check:
• Brake master cylinder reservoir
Cracks/damage → Replace the brake master
cylinder.
• Brake master cylinder reservoir diaphragm
• Brake master cylinder reservoir diaphragm
holder
Cracks/damage → Replace.
3. Check:
• Brake pipes
Cracks/damage → Replace.
EBS30098

CHECKING THE BRAKE PIPES

The following procedure applies to both of the
brake pipes.
1. Check:
• Brake pipe end (flare nut)
Damage → Replace the brake master cylin-
der, brake pipes, and related parts as a set.
EBS30099
INSTALLING THE BRAKE MASTER
CYLINDER
1. Install:
• Brake master cylinder
• Brake pipes
Brake master cylinder bolt
16 Nm (1.6 m·kgf, 12 ft·lbf)
Brake pipe flare nut
19 Nm (1.9 m·kgf, 14 ft·lbf)
EWB03160
WARNING
Proper brake pipe routing is essential to in-
sure safe vehicle operation.
2. Fill:
• Brake master cylinder reservoir
(with the specified amount of the specified
brake fluid)
Specified brake fluid
DOT 4
4-38