PIAGGIO 2012 MSS APE 50, Service Station Manual

Page: 43 / 117

Clutch slipping
CLUTCH SLIPPAGE
Possible Cause Operation
Insufficient idle stroke Adjust the stroke.
Weak return spring Replace.
Worn or burned driven disc gasket Replace the disc.
Insufficient oil in the differential transmission or unsuitable oil Restore the oil level or replace.
Gearbox
OIL LOSS FROM THE TRANSMISSION - DIFFERENTIAL UNIT
Possible Cause Operation
Excessive filling Bring back to level.
Loosening of the crankcase halves locking nuts and the differ-
ential cover
Check the locks, replace the gaskets if necessary.
Axle shaft oil seal hood worn or broken Replace.
Cracked crankcase Replace.
Loose oil drain plug Lock and replace if damaged
Gears disengage abruptly or are difficult to engage
SPONTANEOUS GEARS DISENGAGEMENT
Possible Cause Operation
Gearbox housing worn or damaged Verify and replace if necessary
Badly adjusted control cable Adjust.
Trasmission gears or spiders not properly assembled or worn Review.
Noisy gears
NOISY TRANSMISSION
Possible Cause Operation
Excessive clearance between the gears of the transmission Review and replace the worn components.
Insufficient oil in the differential transmission Restore the oil level or replace.
Bearings of the gear shaft are noisy Replace.
Locked brakes
BRAKES LOCKED EVEN WHEN YOU CEASE TO PRESS THE PEDAL
Possible Cause Operation
Return springs stretched Replace.
Compensation hole on the pump clogged Clean and bleed the air out of the system.
Rubber gasket swollen or sized Check the system, replace all the rubber parts and the fluid,
bleed air from the system: use the recommended oil
Noisy suspension
NOISY FRONT SUSPENSION
Possible Cause Operation
Hub bearings worn or with excessive clearance Replace.
The wheel hub chamber needs to be greased Disassemble and apply grease.
MSS APE 50
Troubleshooting
TROUBL - 43