Generac 86640 - Manual (Page 2)

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Foreword
PURPOSE OF MANUAL:
This Service Manual has been written and published by Generac Corporation to aid our Dealers" mechanics and
company service personnel In the maintenance, servicing, troubleshooting and repair of the products described
herein. All information, illustrations and specifications are based on the latest product Information available at the
time of publication.
Proper service and repair Is important to the safe, economical and reliable operation of all recreational vehicle
and Industrial mobile generators. Troubleshooting, testing and servicing procedures recommended by Generac
and described In this manual are effective methods of performing such operations. Some of these operations or
procedures may require the use of specialized equipment Such equipment should be used when and as
recommended.
Generac could not possibly know of and advise the generator service trade of all conceivable procedures by
which a service or repair might be performed or of the possible hazards and/or results of each method. We have
not undertaken any such wide evaluation. Therefore, anyone who uses a service procedure, method or tool not
recommended by Generac must first completely satisfy himself that neither his nor the product’s safety will be
endangered by the procedure or method selected.
USER’S RESPONSIBILITY:
It Is assumed that service personnel are familiar with the servicing procedures of these products or like or similar
products manufactured and marketed by Generac. It Is further assumed that such personnel have been trained In
the recommended servicing procedures for these products; and that such training Includes the use of mechanic’s
common hand tools, special Generac tools, and tools from other suppliers.
SAFETY:
When working on this product, it must be remembered that the generator AC electrical system produces high
and dangerous voltages that can cause severe electrical shock. Contact with high voltage terminals, bare wires,
etc., can result In dangerous and even fatal Injury.
To prevent accidental engine cranking and startup, always disconnect battery cables before working on or
around the generator.
Cover all openings Into the engine-generator, to prevent entry of foreign materials. Such materials could enter
the engine cylinders and cause extensive damage when the engine Is started.
It Is Important to note that the manual contains various DANGER, CAUTION and NOTE blocks. These should be
read carefully In order to minimize the risk of personal Injury or to prevent methods or practices from being used
which could damage equipment or render It unsafe.
FASTENERS:
Replacement fasteners must have the same measurements and strength as the fasteneres they will replace.
Numbers on the heads of metric bolts and on surfaces of metric nuts indicate their strength. Customary nuts do
not have strength markings. Mismatched or incorrect fasteners can cause damage, equipment malfunction or
possible Injury.
REPLACEMENT PARTS:
Many parts used on recreational vehicle generators and engines are designed and manufactured to comply with
rules and regulations established by the Recreational Vehicle Industry Association (RVIA), American National
Standards Institute (ANSI), and the National Fire Protection Association (NFPA). Strict compliance with such rules
and regulations help to minimize the risk of fire or an explosion. Use of any replacement part that does not comply
with such rules and regulations could result in fire or explosion hazard and should be avoided.