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2. When valve clearance is correct, hold the pivot
ball stud with the allen wrench and tighten the
rocker arm jam nut with a crows foot. Tighten the
jam nut to 65-85 inch-pounds torque. After tight-
ening the jam nut, recheck valve clearance to
make sure it did not change (Figure 3.9).
Figure 3.9 — Tightening Jam Nut
3.14 MAJOR SERVICE MANUAL
To obtain a service manual for the generator, order it
from the dealer/distributor. Be sure to identify the
unit's MODEL NUMBER and SERIAL NUMBER.
3.15 EXERCISING THE GENERATOR
Generac recommends that the generator is started
and operated at least once every seven days. Let the
unit run for at least 30 minutes to "exercise" the
engine.
Section 3 – Maintenance
IMPACT-36 plus II Recreational Vehicle Generator
3.16 OUT OF SERVICE PROTECTION
If the generator cannot be exercised every seven days,
and it is to be out of service longer than 30 days, pre-
pare the generator for storage as follows:
• Start the engine and let it warm up.
• While the engine is still warm from running, drain
the oil completely. Refill crankcase with recom-
mended oil. See "Specifications."
• Attach a tag to the engine indicating the viscosity
and classification of the oil in the crankcase.
• Remove spark plug and add about 1/2 ounce
(15ml) of clean, fresh engine oil into spark plug
threaded opening. Crank engine several times to
distribute oil, then install and tighten spark plug.
• Remove the battery and store in a cool, dry room
on a wooden board. Never store the battery on any
concrete or earthen floor.
• Clean and wipe the entire generator.
3.17 RETURN UNIT TO SERVICE AFTER
STORAGE
To return the unit to service after storage, proceed as
follows:
• Check tag on engine for oil viscosity and classifica-
tion. Verify that the correct recommended oil is
used in engine. If necessary, drain and refill with
proper oil.
• Check battery. Fill all cells to the proper level with
distilled water. DO NOT USE TAP WATER IN THE
BATTERY. Recharge battery to 100% state of
charge, or, if defective, replace the battery.
• Turn OFF all electrical loads, then start the engine.
• Let engine warm up.
• Apply electrical loads up to at least 50% of the
unit's rated wattage capacity.
• When engine is thoroughly warmed up, shut it
down.
THE GENERATOR IS NOW READY FOR SERVICE.
Generac
®
Power Systems, Inc. 13
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