Engine Adjustments; Drive Belt Adjustment; Torquing The Cylinder Head Bolts; Fuel Injectors - Westerbeke 5.0Kw BCDR Operator's Manual

ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following enginE!
adjust~
ments be performed by a competent engine mechanic. The information
below is provived to assist the mechanic.
DRIVE BELT ADJUSTMENT
(FAN BELT)
For your safety, WESTERBEKE 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 lI2
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 pivot belt that holds the idler sheave and
loosen the adjusting bolt.
3. With the belt loose, inspect for wear, cracks and frayed
edges.
4. Pivot the idler sheave to the left or right as required, to
loosen or tighten.
S. Tighten the pivot bolt and the adjusting bolt.
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.
WHEN THE ENGINE IS RUNNING,
KEEP CLEAR OF THE FAN
AND ENGINE BELT.
PIVOT BOLT
TORQUING THE CYLINDER 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, lom;en it
114 to 112 of a turn 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-Ib
Bolts #4,5,6, 7, 8, (14mm socket) (54 -- 61 ft-Ib)
Rockershaft Hold Down Bolts - 12mm socket (11 - 16 ft-lb).
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 environment,
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 from
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 removed with the injector and
replaced with a new washer when the new injector is
installed. .
INJECTOR TO CYLINDER HEAD TIGHTENING TORQUE
40
±
4 fI-lb (5.5
±
0.5 kgf-m)
Engines & Generators
22