RDG603A8 - Issue 1 - Shire 14 Canal Boat Complete Manual 30, 35, 38, 40, 45, 50.doc
Page 36 of 50
9. Belt Adjustment
CAUTION:
REMOVE THE IGNITION KEY BEFORE WORKING IN THE ENGINE
COMPARTMENT.
Depress the longest run of the drive belt to be checked. If the travel exceeds 15 -20mm
using hard finger pressure, the belt needs re-tensioning.
Loosen the upper adjuster bolts on the alternator, and the lower mounting pivot nut and
bolt, either pull out using hand pressure or use the tensioning screw, depending on
which alternator belt is to be tensioned.
Pull the alternator away from the engine to tighten the belt.
Hold the alternator in position and re-tighten all the bolts.
Note: if the belts are over tightened alternator bearing failure will occur.
10.
Belt Maintenance
Do not allow oil to contact the belt. Oil attacks the construction of the belt, reduces the
drive efficiency and will ultimately cause it to fail prematurely.
Replace the belt if it cracks or splits and as the adjustment nears the limit of its travel.
Note: Some boat builders may remove one or more of the alternators during the
installation of the engine. It is essential that when the alternators are re-fitted that the
alignment is perfect or premature belt wear will occur.
11.
Belt Replacement
CAUTION:
REMOVE THE IGNITION KEY BEFORE WORKING IN THE ENGINE
COMPARTMENT.
Ensure that you have the correct replacement belts before starting this procedure.
(Some engines may have been fitted with non-standard optional alternators which may
not use the belt sizes listed. Make a note of these belt sizes up on delivery).