Yamaha MBK MW125 2014, Service Manual

Page: 165 / 380

REAR BRAKE
4-56
• Never use solvents on internal brake com-
ponents as they will cause the brake caliper
piston dust seal and brake caliper piston
seal to swell and distort.
• Whenever a brake caliper is disassembled,
replace the brake caliper piston dust seal
and brake caliper piston seal.
EAS30190
INSTALLING THE REAR BRAKE CALIPER
1. Install:
• Rear brake caliper “1”
(temporarily)
• Copper washers “2”
• Rear brake hose “3”
• Brake hose union bolt “4”
WARNING
EWA13530
Proper brake hose routing is essential to in-
sure safe vehicle operation.
NOTICE
ECA14170
When installing the brake hose onto the
brake caliper “1”, make sure the brake pipe
“a” touches the projection “b” on the brake
caliper.
2. Remove:
• Rear brake caliper
3. Install:
• Brake pad support
• Brake pad spring
• Brake pads
• Brake pad pin
• Brake pad pin cap
• Rear brake hose holder
• Rear brake caliper
Refer to “REPLACING THE REAR BRAKE
PADS” on page 4-53.
4. Fill:
• Brake master cylinder reservoir
(with the specified amount of the specified
brake fluid)
WARNING
EWA13540
• 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.
NOTICE
ECA13540
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 3-12.
6. Check:
• Brake fluid level
Below the minimum level mark “a”
→
Add the
specified brake fluid to the proper level.
Refer to “CHECKING THE BRAKE FLUID
LEVEL” on page 3-11.
Specified brake fluid
YAMAHA GENUINE BRAKE
FLUID (DOT 4)
T
R
.
.
Rear brake hose union bolt
29 Nm (2.9 m·kgf, 21 ft·lbf)
New
4
1
a
2
3
b
New
T
R
.
.
Rear brake pad pin
17 Nm (1.7 m·kgf, 12 ft·lbf)
Rear brake pad pin cap
2.5 Nm (0.25 m·kgf, 1.8 ft·lbf)
Rear brake hose holder bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Rear brake caliper bolt
27 Nm (2.7 m·kgf, 20 ft·lbf)
Specified brake fluid
YAMAHA GENUINE BRAKE
FLUID (DOT 4)