OPERATION
GENERAL
ONAN EK/EM Series electric generating sets are
given a complete running test under various load
conditions and are thoroughly checked before leav-
ing the factory. Inspect your unit closely for loose or
missing parts and damage which may have occurred
in transit. Tighten loose parts, replace missing parts
and repair any damage before putting set into opera-
tion.
PRESTART
SERVICING
Lubrication System: Engine oil was drained prior to
shipment. Fill engine to capacities shown. After
engine has been run, check dipstick, add oil to bring
level to safe mark (see Figure 23). Record total
capacity for future oil changes. Do not mix brands nor
grades of lubricating oils.
ENGINE OIL LEVEL DIPSTICK
FIGURE
23. OIL
LEVEL
DIPSTICK
•10° F +10° F +32° F +60° F +90° F
-5W30-*-
-10W-
-10W30-
-10W40-
-2OW20-
-20W40-
-30-
CAUTION
1.
Verify that the electric solenoid valve used
with city water cooled sets is open before
initial starting of set to allow coolant chambers to
fill.
Overheating
and damage to the engine could result from non-compliance.
2.
If engine is equipped with a cooling system filter, do not use
antifreeze with an anti-leak formula. The stop leak element can
prevent or retard the coolant flow through the filter, thereby
eliminating the filtering process completely.
WARNING
-40-
Be careful when checking coolant under
pressure. It is advisable to shut engine down
and bleed off pressure before removing pressure cap. Severe bums
could result from contact with hot coolant.
Fuel:
If the set uses gasoline
fuel,
see that the fuel
supply tank is properly filled with automotive
"regular" gasoline. Do not use highly leaded premium
grade gasoline. Check with the fuel supplier for
assurance that the fuel supplied meets the
specifications. Make every effort to keep the fuel
supply clean.
If the set is equipped for gas
fuel,
see that the fuel
supply is turned on. Observe all safety precautions
regarding the use of gas
fuel.
Combination Gas-Gasoline: A set designed for nor-
mal operation on gas fuel with provision for emergen-
cy operation on gasoline
fuel,
is equipped with a gas-
gasoline toggle switch. Throw the switch to the
appropriate position according to the type of fuel in
use.
Check all connections in fuel system for security, to
ensure that pressure will not bleed off when engine is
not in use. Pressure should be maintained for im-
mediate starting if unit is on standby service.
Oil capacities (nominal)
Oil Pan and Filter — 7-quarts (6.6 litres)
Cooling System: Cooling system was drained priorto
shipment. Fill cooling system before starting.
Nominal capacity is 20-quarts (19 litres). For units
using either a radiator or heat exchanger (city water
cooled),
fill the system with clean soft water. Use a
good rust and scale inhibitor additive. If a possibility
exists of a radiator cooled set being exposed to
freezing temperatures use anti-freeze with an
ethylene-glycol base. During initial engine run, check
the coolant level several times and replenish if
necessary to compensate for air pockets which may
have formed during filling. Refer to Ford engine
manual for additional information.
BATTERIES
Ensure that the cable.connections to the batteries are
secure. Coat connections with petroleum based or
non-conductive grease to retard formation of cor-
rosive deposits.
Check level of electrolyte to be at split ring mark.
Measure specific gravity of electrolyte: SG 1.280 at
80°
F
(26.7°C). If distilled water has been added cr
specific gravity is less than
1.280,
place batteries on
charge until desired reading is reached. Do not over
charge.
22
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