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Service
Manual
Moby XL, SE-803
Engine Repair
ENGINE SERVICE
Troubleshooting should alert you to problem areas, and these problem areas
can be addressed as major sub-components of the engine:
•
Centrifugal
Clutch
•
Recoil
Starter
•
Electrical
System
•
Fuel System Components
•
Exhaust
System
•
Crank
Case
It is important to properly identify which areas of the engine require service to
avoid any unnecessary tear down of components not requiring service.
CLUTCH SYSTEM
CAUTION
: Never attempt to run the engine with the clutch exposed. The clutch is designed to overcome the force of the
spring, thus allowing contact with the clutch drum, ultimately providing drive to the PTO side of the equipment. If the clutch
is not contained within the clutch drum while the engine is running, the clutch components may come detached from the
engine and pose a risk of flying objects.
The clutch system is made up of the clutch shoes, clutch spring, and the bolts
and washers (flat and waved) securing them to the flywheel.
Using an impact wrench or a sharp blow to a socket wrench, remove the bolts securing
the clutch to the flywheel (right hand threaded, counter-clockwise for removal.) This
will enable all of the components to be inspected. Check for any signs of damage to
clutch shoes or excessive wear on the lining of the shoes. When new, the shoes have
approximately two millimeters of lining. Order spares as needed.
Inspect the wave washers mounted between the bolt and the clutch shoes to ensure
that they are not cracked and still provide spring tension. Ensure that the spring is not
cracked or broken. Replace as needed.
When re-installing the clutch components, attach the spring between the shoes then
add the bolts with the wave washers. Hold in place with the flat washers between the
backside of the clutch arms and the flywheel, and tighten the stepped bolts to
185 in.-lbs.
