INTRODUCTION
ENGINE
OVERHAUL
This service manual contains detailed information relating to
the overhaul
of
the
55A
FOUR Diesel Engine. For the major
overhaul procedure, refer to the ENGINE DISASSEMBLY,
ENGINE INSPECTIONAND
REPAIR,
and ENGINE
REASSEMBLYsections. Additional service information for
specific components and systems may be found by referring
to the
Table
of
Contents and the Index. Refer also to your
WESTERBEKE Parts Catalog.
These service procedures are intended for the guidance
of
suitably equipped and staffed marine engine service and
rebuilding facilities, and should only
be
undertaken
by
such-
facilities and their personnel.
PRODUCT
SOFTWARE
Product software (tech data, parts lists, manuals, brochures
and catalogs) provided from sources other than WESTER-
BEKE are not within WESTERBEKE'S control.
WESTERBEKE CANNOTBE RESPONSIBLE FOR
THE
CONTENTOFSUCH
SOFTWARE,
MAKES NO
WAR-
RANTIES OR REPRESENTATIONS
WITH
RESPECT
THERETO,
INCLUDINGACCURACY, TIMELINESS OR
COMPLETENESS THEREOFAND
WILL
INNO EVENT
BELIABLE FOR
ANY
TYPE
OFDAMAGE OR INJURY
INCURRED
IN
CONNECTION WITH
OR
ARISING OUT
OF
THE
FURNISHING OR
USE
OFSUCH SOFTWARE.
WESTERBEKE customers should also keep in mind the
time span between printings
of
WESTERBEKE product soft-
ware and the unavoidable existence
of
earlier WESTER-
BEKE manuals. Product software provided with
WESTERBEKE products, whether from WESTERBEKE
or
other suppliers, must not and cannot
be
relied upon exclu-
sively as the definitive authority on the respective product.
It
not only makes good sense but is imperative that appropriate
representatives
of
WESTERBEKE
or
the supplier in question
be consulted to determine the accuracy and currentness
of
the
product software being consulted by the customer.
NOTES,
CAUTIONS
AND
WARNINGS
As this manual takes you through the service procedures and
troubleshooting
of
your marine engine, critical information
will be highlighted by
NOTES,
CAUTIONS,
and
WARNINGS.
An
explanation follows:
NOTE:
An
operatingprocedure essential
to
note.
A
CAUTION:
Procedures.
which
if
not
strictly
observed.
can
result
in
the
damage
or
destruction
of
your
engine.
A
WARNING:
Procedures,
which
if
not
properly
fol-
lowed.
can
result
in
personal
injury
or
loss
of
life.
CUSTOMER
IDENTIFICATION
CARD
1-WV-IWESIE'RBEKE
I
Customer Identification
MR. ENGINE OWNER
MAIN STREET
HOMETOWN,
USA
Model
55A
FOUR Ser.
#UOOOO-D702
Expires 4/4/98
The WESTERBEKE engine serial number is an alphanu-
meric number that can assist in determining the date
of
man-
ufacture
of
your WESTERBEKE engine. The manufacturer's
date code is placed at the end
of
the engine serial number and
consists
of
a character followed by three numbers. The char-
acter indicates the decade (A=1960s, B=1970s, 0=1980s,
D=1990s), the first number represents the year in the decade,
and the second and third numbers represent the month
of
manufacture.
ORDERING
PARTS/SERIAL
NUMBER
LOCATION
Whenever replacement parts are needed, always provide the
engine model number and engine serial number as they
appear on the silver and black identification nameplate
located on the side
of
the manifold. The engine serial number
can also be found stamped into the engine block just above
the injection pump.You must provide us with this informa-
tion so we may properly identify your engine. In addition,
include a complete part description and part number for each
part needed (see the separately furnished Parts List). Also
insist upon WESTERBEKE packaged parts because willfit
or
generic parts are frequently not made to the same specifi-
cations as original equipment.
NOTE:
Component locations
in
this manual
are
referenced
from
the front
of
the
engine which is thepulley/drive belt
end.
Left and right sides
are
determined as follows: imagine
straddling the
engine,
facing
in
the same direction as the
front
of
the
engine: the left side is at your
left,
the right side
is
atyour
right.
Owners may find it convenient to fill
in
the engine identifica-
tion nameplate shown below toprovide a quick reference
when
using this service manual
Engines & Generators
2
