General Information
INTRODUCTION
This manual deals with specific mechanical and elec-
trical information needed by engine mechanics for
troubleshooting, servi,cing, repairing, or overhauling
the engine.
Use the table of contents for a quick reference to the
separate engine system sections.
Use the separate parts catalogs, available at the
dealer level, for parts identification and for establish-
ing their proper location on assemblies.
The troubleshooting guide is provided as a quick
reference for locating and correcting engine trouble.
The illustrations and procedures presented in each
section apply to the engines listed on the cover. The
flywheel end of the engine is the front end,
so
right
and left sides are determined by viewing the engine
from the front.
The disassembly section contains major overhaul
procedures for step by step removal, disassembly,
inspection, repair, and assembly of the engine
components.
If a major repairpr an overhaul is necessary, a compe-
tent. mechanic should either do the job or supervise
and check the work of the mechanic assigned to
do
the job to ensure that all dimensions, clearances, and
torque values are within the specified tolerances.
The wiring diagram on the last page of the manual
shows how the electrical components are inter-
connected.
A parts catalog (available at the dealer level) contains
detailed exploded views of each assembly, the indi-
vidual piece part numbers, and their proper names,
for ordering replacement parts.
.
Use only Genuine Onan replacement parts to ensure
quality and the best possible repair and overhaul
results. When ordering parts, always use the com-
plete 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
SPEC (specification)
NO.
as shown on the unit
nameplate. Always use this number and the engine
serial number when making reference to your engine.
How to interpret
MODEL
and
SPEC
NO.
on generator
set engines.
<
1
2
34
1.
Factory code for general identification purposes.
2.
Specific TYPE, as follows.
R
-
REMOTE type. Electric starting. Optional
accessory equipment can be connected for
2
wire remote control of starting and stopping.
A two
(2)
wire automatic line transfer control
is available for standby service.
E
-
ELECTRIC start type. Electric starting at the
plant only.
3.
Factory code for specific optional equipment
4.
Specification (Spec Letter). Advances with fac-
How to interpret
MODEL
and
SPEC
NO.
on industrial
engines.
supplied.
tory production modifications.
1.
4.5
1
1.
Factory code for general identification purposes.
2.
Starter TYPE,
as
follows:
M-ELECTRIC start type.
S-MANUAL start type.
3.
PTO TYPE, as follows:
F
-
CLUTCH
A
-
STUB SHAFT
4.
Factory code for specific optional equipment
5.
Specification (Spec Letter). Advances with fac-
supplied.
tory production modifications.
2
Redistribution or publication of this document,
by any means, is strictly prohibited.
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