Engine Overheating - Gilera 633499 Workshop Manual

Troubleshooting
Engine

Engine overheating

Possible Cause
No coolant in the cooling circuit
Incorrect air bleeding
Thermostat remains closed
Fluid leak in the radiator
Loss of fluid from the system
Coolant leaks from crankcase draining hole
Shaft support bearings water rotor command and
mixer locked.
Breakage of mixer belt
Transmission and brakes
Clutch grabbing or performing inadequately
Possible Cause
Tear or irregular functioning
WARNING
NEVER ALLOW THE ENGINE TO REV WITHOUT THE CLUTCH BELL.
Insufficient braking
Possible Cause
Insufficient braking
TROUBL - 2
ENGINE OVERHEATING
Replace coolant sealing ring on half-crankcase
Replace the shaft complete with bearing
FAULTY CLUTCH
Ensure the masses move at the touch of a finger
Ensure there is no grease on the masses.
Ensure the seals work correctly (area of work at
Ensure the clutch bell is not scored.
Rpm at start of drag: 4,000 revs per min.
Rpm on full throttle with rear wheel braked (3"÷ 6"
max.): 7000 - 7500 revs per min.
BRAKE SYSTEM
Check wear of brake pads (1.5 mm MIN).
Check brake discs are not worn, scored or de-
Check the correct level of liquid in the pumps and
Check there is no air in the circuits; if necessary,
Runner Purejet
Operation
Restore the level
Repeat the operation
Replace
Replace the radiator
Servicing the system
from transmission-side
Replace belt
Operation
and return as normal.
the centre).
Check:
Operation
formed.
replace brake fluid if necessary.
bleed the air.