4 - 39
FRONT AND REAR BRAKES
FRONT BRAKE CALLIPER TIGHTNESS
The following procedure is applied to both brake callipers.
NOTE:_________________________________
Before disassembling the brake calliper, discharge the brake
fl uid from the complete braking system: refer to “Frame/
brake fl uid level check, Chapter 3”.
Remove:
•
the special screw (24*) and (19*) Fig. A
•
the sealing washers (9*) Fig. A
•
the front brake hose (12) Fig. A
•
the screws (A) Fig. B
•
Remove both callipers.
NOTE:_________________________________
Insert the end of the brake hose into a container and slowly
pump out and drain the brake fl uid.
IMPORTANT NOTICE
Brake fl uid rapidly damages painted plastic surfaces; com-
pletely wash the concerned zones immediately.
Detach:
•
the pistons (1) Fig. C
•
the seals (2) Fig. C
Secure:
•
the pistons of the brake callipers with a block of wood Fig. D
•
Blow compressed air into the attachment of the fl exible
brake hose to push the left pistons outwards from the brake
calliper.
IMPORTANT NOTICE
Never try to prise out the calliper pistons.
NOTE:_________________________________
Repeat the above-mentioned procedure to force the pistons
out from the opposite brake calliper.
Check:
The ring seal of the damaged brake calliper.
The ring seal (piston seal) (2) Fig. C that are found inside the
piston to maintain the play between the pads and the disc.
If the seal is in bad condition, it can cause excessive wear of the
pads or sticking of the brake, with a consequent increase of the
temperature of the discs or the brake fl uid.
Replace:
•
the seals (2) Fig. C
Substitute the seal if it shows signs of the following:
• Brake
fl uid leak around the brake pads.
• Brakes
overheating.
•
Notable difference of wear between the internal and exter-
nal brake pads.
•
If the seal and piston are stuck to each other.
Substitute the seals when substituting the brake pads.
NOTE:_________________________________
The numbers marked (*) are a part of the spare parts table,
chapter “Front and rear brakes”, paragraph “Removal of the
front brake pump”.
20
9
9
9
9
9
10
11
12
14
15
16
17
17
18
24
19
30
31
A
B
A
A
C
1
2
D
COPY - Moto GB - Grant Martland - grantmartland@motogb.co.uk
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