Product Manual

Specifications
Owner’s Manual for Stationary Diesel Generators 7
Engine Oil Recommendations
To maintain the product warranty, the engine oil should
be serviced in accordance with the recommendations of
this manual. For your convenience, maintenance kits
designed and intended for use on this product are avail-
able from the manufacturer that include engine oil, oil fil-
ter, air filter, spark plug(s), a shop towel and funnel.
These kits can be obtained from an Independent Autho-
rized Service Dealer (IASD).
All Generac maintenance kits meet minimum American
Petroleum Institute (API) Service Class CD or better.
Select appropriate viscosity oil grade according to
expected operating temperature. After break-in, synthetic
oil also can be used in the appropriate weight as stan-
dard. Once synthetic oil is used, it should be used for the
life of the generator. It is not recommended to go back to
a mineral oil. Do not use special additives.
Figure 2-2. Lubricating Oil Recommendations
Coolant Water Treatment
Use of incorrect coolants can damage engine cooling
system. Use demineralized water or distilled water for
best results. Hard water causes scale deposits, which
reduces cooling efficiency and raises internal tempera-
tures, possibly leading to engine damage. Use an anti-
corrosive to prevent rot in summer and anti-freeze to pre-
vent freezing in winter.
Dilute anti-freeze based on a theoretical temperature that
is 9–18 °F (5–10 °C) below lowest temperature expected
in the area. A ratio of 40–60% is most common range.
NOTE: Use only Peak Fleet-Charge
®
50/50 ethylene
glycol type coolant (available from any IASD).
IMPORTANT NOTE: Do not use propylene glycol
type coolant. Using the wrong coolant, mixing differ-
ent types of coolant, or even mixing different brands
of the correct type of coolant, can produce unsatis-
factory results, possibly leading to engine damage.
Fuel Requirements
IMPORTANT NOTE: DO NOT use Home Heating Oil
or Bio-Diesel Fuel.
Use No. 2D diesel fuel when temperatures are above
freezing. When temperatures are below freezing, blend
No. 1D diesel fuel and No. 2D diesel fuel together for a
climate adjusted fuel ratio.
• Use only ultra-low sulfur diesel fuel (ULSD)
NOTE: Low ambient temperatures as well as engine
operation at high altitudes may require use of fuels with
higher Cetane ratings.
Allow at least 5% of tank capacity for fuel expansion. DO
NOT OVERFILL!
Fuel Maintenance
Always treat diesel fuel for long term storage. Use
approved fuel additive and water abatement material.
Test stored fuel every 90 days and provide additional
treatment if required. Periodically inspect and dry abate-
ment material as necessary.
Corrosion Protection
Periodically wash and wax the enclosure using automo-
tive type products. Frequent washing is recommended in
salt water/coastal areas.
Freezing Point °F (°C) -13 (-25) -31 (-35) -58 (-50)
Coolant (% Volume) 40 50 60
Water (% Volume) 60 50 40
ºC
-40
15W-40
10W-30
5W-30
-30 -20 -10 0 10 20 30 40 50
ºF
-40 -22 -4 14 32 50 68 86 104 122
ºC
-40 -30 -20 -10 0 10 20 30 40 50
ºF
-40 -22 -4 14 32 50 68 86 104 122
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