1. Introduction

About This Manual

This is the Service Manual for the generator sets (gensets) listed on the front cover.

WARNING This genset is not a life support system. It can stop without warning. Children, persons with physical or mental limitations, and pets could suffer personal injury or death. A personal attendant, redundant power or alarm system must be used if genset operation is critical.

WARNING Improper service or replacement of parts can lead to severe personal injury or death and to damage to equipment and property. Service personnel must be qualified to perform electrical and mechanical service.

Unauthorized modifications or replacement of fuel, exhaust, air intake or speed control system components that affect engine emissions are prohibited by law in the State of California.

Nameplate

Be ready to provide the genset model and serial numbers on the nameplate when contacting Onan for parts, service or information. Figure 1-1 illustrates the nameplate and its location. The gray boxes illustrate where to look for the model and serial numbers.

[The engine family designation, engine displacement, statement of compliance with applicable EPA and / or California emissions regulations appear in this block on the actual nameplate on the genset.]

Typical Genset

Figure 1-2 illustrates the fuel, battery, remote control and AC output connection points, the flow of cooling and ventilating air and the maintenance and service access panels of a typical genset. Not shown are the combustion air inlet and oil drain openings in the base.

MAINTENANCE ACCESS AC OUTPUT AND REMOTE CONTROL CONNECTIONS

FUEL CONNECTIONS

EXHAUST CONNECTIONS

CONTROL PANEL

BATTERY CONNECTIONS

COOLING & VENTILATING AIR IN HOT AIR OUT