Specifications
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