MOTO GUZZI V1000 G5 Workshop Manual page 124

CAUSE
High pad wear
Pad locked In housing, braking disc constantly
touching
Pistons Jammed
Disc deeply scored
Irregular or slantway pad wear
Dirty pad housing
Poor sliding of pistons
Defec tive pad spring
Caliper mounted sla ntways
Control lever or pedal too long
Brake disc floating more than 0.2 mm
(.0078")
Air bubbles in braking circuit
Brake disc deeply scored
Non-return 01 master cylinder floater
Staple securing screws too tight
Lever securing bolt too tight (non original bolt)
Lever-housing incorrectly coupled In master cy-
li nder
Scraper ring deformed by etching liquid
Dirty brake fluid
Defective floater return spring
Fluid leakages from reservoir
Gaiter not properly positioned
Damaged gaiter
Damage fluid reservoir rim
23.19 RECOMMENDATIONS
All rubber parts of the braking circuits (for master
cylinder : gaskets, scraper ring and gaiter; for caliper
halves : gasket and dust guard cap) are made 01 a
special compound resisting to brake fluid. These
parts. however, cannot stand the etching action of
mineral oils, solvents and / or diesel oil which are
sometimes used to wash down the machine.
Accordingly, it is strongly recommended to avoid
contact of these liquids with the rubber parts in the
circuit. For Instance, it may occur that the master
cylinder scraper. with contact with gasoline or die-
sel oil, will melt and glues to the floater, affecting
its sliding action.
122
AE ""EOY
Clean pad housing in caliper, check if properly
housed in guides
Restore sliding condition
Grind or replace disc
Clean pad housings
Restore proper sliding condition
Replace sprin g
Check and mount properly
Grind or replace disc
Bleed the air
Grind or replace disc
Partially slacken screws
Partially slacken bolt
Replace lever
Replace scraper ring
Strip, check and clean master cylinder compo-
nents (no seizing or scoring marks admitted) ,
replace fluid
Replace spring
Fit gaiter properly in its housing and gently close
cap
Replace gaiter
Repair or replace reservoir
The caliper gaskets are subject to sUcking to the
piston
It is sometimes possible thai during storage of the
calipers before assembly or when the machine !I-
sert is left unused for long periods of time, in a
relativel short period (for Instance 2-4 months accor-
qing to the intruence of negative factors such as ma-
chining tolerances, tolerances in the compound ,
ambient conditions etc.) this phenomenon may occur.
non may occur.
Should this happen , operate as follows :
a Actuate the control lever or pedal several times
until the correct pad-disc clearance is rest"red.
b If this leads to no results :