Service Manual
Section
1
General Information
INTRODUCTION
This manual provides specific mechanical and
electrical information needed by engine mechanics
for troubleshooting, servicing, or overhauling the
engine.
Use the separate parts manual for parts identifica-
tion and for establishing their proper location on as-
semblies. The parts manual contains detailed ex-
ploded views of each assembly and the individual
piece part numbers and their proper names for
ordering replacement parts.
The illustrations and procedures presented in each
section apply to the engines listed on the cover. The
air cleaner side of the engine is the front end. Right
and left sides are determined by viewing the engine
from the front.
If
a major repair
or
an overhaul is necessary, have a
trained and experienced mechanic perform the re-
pair and
see
that all dimensions, clearances and
Use the table of contents for a quick reference to the
separate engine system sections.
The troubleshooting guide is provided as a quick
reference for locating and correcting engine
problems.
The wiring diagram shows how the electrical com-
ponents are interconnected.
The
Engine
BIock Assembly
section contains major
overhaul procedures for step by step removal,
torque values are within the specified tolerances.
disassembly, inspection, repair, and assembly of
the engine components.
Use only Genuine Onan replacement parts to pro-
vide quality and the best repair and overhaul
results. When ordering parts, always use the
complete model and spec number as well
as
the
serial number shown on the nameplate.
TABLE
1-1.
ENGINE MODEL IDENTIFICATION
1. Model letter designation.
2.
BHP
rating. Add a decimal one digit in from the
3.
Designation
(V
=
vertical shaft,
H
=
horizontal
4. Engine fuel. (Example N
=
gasoline,
L
=
LP,
5.
Factory code for designated optional equip-
6.
Specification (spec letter) which advances with
right end. (Example 140
=
14.0)
shaft).
D
=
Dual fuel)
ment,
if
any.
factory production modifications.
INCORRECT SERVICE
OR
REPLACEMENT
OF
PARTS CAN RESULT IN SEVERE PERSONAL IN-
JURY AND
OR
EQUIPMENT DAMAGE. SERVICE PERSONNEL MUST BE QUALIFIED
TO
PERFORM
ELECTRICAL AND/OR MECHANICAL SERVICE.
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