Installation manual
ENGINE
ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine adjust-
ments be
peiformed by a competent engine mechanic. The information
below is provived to assist the mechanic.
DRIVE
BELT
ADJUSTMENT
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
Mvised that proper inspection,
service,
and
maintenance
is
tequired.
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
112
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.
5. 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.
t·
DEIUCTION
1/2"
TO
3/8"
PIVOT
BOLT
TORQUING
THE
CYLINDER
HEAD
BOLTS
Mter 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
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-Ib).
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
ir1iector
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.
Tins
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
28