MOTO GUZZI CALIFORNIA JACKAL Werkstatt-Handbuch Seite 179

D
ISK BRAKE TROUBLES
A
Trouble cause
The brake squeaks
The brake caliper is not fully tightened
B
Positioning springs are faulty or missing
Brake pads are worn beyond the limit
Brake pads are dirty with oil or grease
Wrong brake pads have been fitted
C
Brake disk overheats during normal operation
Pistons are blocked; brake pads stick to the disk
D
Brake lever has no backlash
Braking capacity is insufficient
Brake disk is dirty with oil or other material
E
Brake pads are too much worn or vitrified
Brake pads are dirty with oil or grease
Pistons are jammed
The brake is jammed
F
Brake pads have a too high coefficient of friction
Brake disk is highly oxidized
Brake pads are extremely worn
G
Brake pads are locked in their seat and
continuously in contact with the disk
Pistons are blocked
Brake disk is deeply scored
H
Brake pads wear irregularly and sideways
Brake pad seats are dirty
I
Piston movement is not smooth
Brake pads positioning springs are faulty
Caliper has been assembled sideways
Brake lever stroke is too big
L
Brake disk wobbles more than 0.2 mm
The hydraulic system contains air
Brake disk is extremely scored
M
Non-return of the pump float
Jumper fastening screws are too tight
Lever shoulder nut is too tight
(non-original screw)
Lever shim is bigger than the pump seat
N
Brake fluid is dirty
O
Fluid leakage from tank
Membrane is misplaced
Membrane is damaged
Tank edge is dented
P
38
Trouble removal
Tighten fastening screws
Place new positioning springs
Place new brake pads after checking
disk condition
Replace brake pads
Replace brake pads
Check pistons, clean brake pad seats
in the caliper
Adjust lever backlash according to instructions
Clean the disk
Replace brake pads and check the disk
Replace brake pads
Make pistons run smoothly
Fit proper brake pads
Grind the disk or replace it
Clean the brake pad seat in the caliper and
check the pads coupling with their guides
Make pistons run smoothly
Grind the brake disk or replace it
Clean the seats
Make the piston run smoothly
Replace the springs
Check and remove the fault
Check the assembly, grind the disk or replace it
Drain the system
Grind the brake disk or replace it
Partially loosen the screws
Partially loosen the screw
Replace the lever
Disassemble, clean and check all pump components
(no seizing or scoring allowed)
and replace the fluid
Place the membrane in its seat and
gently close the plug
Replace the membrane
Replace the pump
W
HEEL PARTS