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ENGINE ADJUSTMENTS
NOTE: WESTERBEKE recommends
that the
following engiM adjust-
ments be perfonned by a competent engine mechanic. The information
below is provived to assist the mechanic.
DRIVE BELT ADJUSTMENT
For your safety, WES1ERBEKE generator models come
equipped with belt
guards
that cover over the belt(s) on the
front of the engine. (''Out of sight- out of mind." The belt
guard
is NOT installed for that purpose.) Operators are
advised that proper inspection, service, and maintenance is
required.
Excessive drive belt tension can cause rapid wear of the belt
and reduce the service life of the fresh water pump's bearing.
· A slack belt or the presence of oil on the belt can cause belt
slipping, resulting in high operating temperatures.
The drive belt is properly adjusted if the belt
can
be
deflected no less
than
3/8 inch (lOmm) and no more than 1/2
inch
(12mm) as
the belt
is
depressed with the thumb at the
midpoint between the two pulleys on the longest span of the
belt. A spare belt or belts should always be carried on board.
A
WARNING:
Never attempt to check or adjust the
drive belt's tension while the engine is in operation.
Adjusting Belt Tension
1. Remove the belt guard.
2.
Loosen the adjusting
strap
bolt and the alternator pivot bolt.
3. With the belt loose, inspect for wear, cracks and frayed edges.
4. Pivot the alternator to properly tension the drive belt.
5. Tighten the adjusting strap bolt and the pivot belt.
6. Replace the guard. Operate the generator for about 5
minutes and then shut the generator down.
7. Remove the guard and recheck the belt tension.
8. Replace the guard.
TORQUING THE CYUNDER HEAD BOLTS
After the initial break-in period (approximately 50 hours) and
every 500 hours thereafter, the cylinder head bolts should be
re-torqued.
Tighten the cylinder head bolts according to the sequence
shown. Make
sure
the engine
is
cold when
this
is done.
Before applying the specified torque to the bolt, loosen it
114 to 1/2 of a
tum
and then apply the torque. Follow this
procedure according to the numbered sequence shown in the
illustration to the right
Bolts #1, 2 and
3; (12mm
socket)
14-22
ft-lb
Bolts #4, 5, 6, 7, 8, 9, 10 and 11
(14mm
socket) (54- 61 ft-lb)
Rocketshaft Hold Down Bolts-
12mm
socket
(11 -
16 ft-lb)
Rocker Cover Hold Down Cap Nuts-
(IOmm
socket) (snug)
CYLINDER HEAD BOLT PATTERN
, .FUEL INJECTORS
In case of severe vibrations and detonation noise, have the
injectors checked and overhauled by an authorized fuel
injection service center. Poor fuel quality, contaminant's and
loss of positive fuel pressure to the injection pump
can
result
in injector faults. Since fuel injectors must
be
serviced in a
clean room envir<;mment, it is best to
carry at least
one
extra
injector as a spare should a problem occur.
Before removing the old injector, clean the area around the
base of the injector to help prevent any
rust
or debris fiom
falling down into the injector hole. If the injector will not lift
out easily and
is
held in by carbon build-up or the like, work
the injector side-to-side with the aid of the socket wrench to
free
it, and then lift it out
The injector seats in the cylinder head on a copper sealing
washer. This washer should be remov.ed with the injector and
replaced with a new washer when the new injector is
installed.
.
INJECTOR TO CYUNDER HEAD nGHTENING TORQUE
40
±
4 ft-lb (5.5
±
0.5 kgf·m)
Engines & Generators
22.
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