General Information
INTRODUCTION
This manual deals with specific mechanical and elec-
trical information needed by engine mechanics for
troubleshooting, servicing, repairing, or overhauling the
engine.
.
*
Use the separate PARTS MANUALfor parts identification
and for establishing their proper location on assemblies.
The PARTS MANUAL contains detailed exploded 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
flywheel-blower end of the engine is the front end
so
right and left sides are determined by viewing the engine
from the front. The No.
1
cylinder is on the left, No.
2
cylinder is on the right.
If
a major repair or an overhaul is necessary, acompetent
mechanic should either do the job or supervise and
check the work of the mechanic assigned to the job to
ensure that all dimensions, clearances and torque
values are within the specified tolerances.
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 trouble.
The wiring diagram shows how the electrical compo-
nents are interconnected.
The disassembly section contains major overhaul
procedures for step by step removal, disassembly,
inspection, repair, and assembly of the engine
components.
Use only Genuine Onan replacement parts
to
ensure
quality and the best possible 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.
ENGINE
MODEL
REFERENCE
Identify your model
by
referring to the model and
specification (spec letter) as shown on the unit name-
plate. Always use these numbers and the engine serial
number when making reference
to
your engine.
How to interpret
MODEL
and SPEC
NO.
B
48
G G
A
0201
1
D
TTTTTT
TT
123456
78
IAWARNING
i
1.
Factory code for general identification
of
basic
engine series.
2.
Cubic inch displacement.
3.
Engine duty cycle.
4.
Fuel required (G=gasoline).
5.
Cooling system description
(A=air-cooling-pressure).
6.
BHP rating.
7.
Factory code for designated optional equipment, if
8.
Specification (spec letter) which advances with
any.
factory production modifications.
INCORRECT SERVICE OR REPLACEMENT
OF
PARTS CAN RESULT IN
SEVERE PERSONAL INJURY AND/OR EQUIPMENT DAMAGE. SERVICE
PERSONNEL MUST BE QUALlFlED TO PERFORM ELECTRICAL AND/OR
MECHANICAL SERVICE.
1-1
Redistribution or publication of this document,
by any means, is strictly prohibited.
To Next Page
Loading...
Need help?
General
