OPERATION
GENERAL
ONAN DDB Series electric generating sets are given a
complete running test under various load conditions
and are thoroughly checked before leaving the fac-
tory. 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 operation.
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 full mark. Record total capacity for future oil
changes. Do not mix brands or grades of lubricating
oils.
AMBIENT TEMPERATURE
SINGLE VISCOSITY MULTI-VISCOSITY
Below -10
o
F (-23
0
C)
SAE 5W
SAE 5W20
Between -10° F and 32° F
SAE 10W
SAE 10W30
(-23
0
C
and 0
o
C)
Above 32° F (0°C)
SAE 30
Not Recommended
Use oil conforming
API CD/SD
API CC/SE, CC/SD
to these specifications
MIL-L-2104C* or SD
Series 3* MIL-L-46152
*API CC or CD
Oil capacities (nominal)
Oil Pan and Filter — 12 quarts
Cooling System: Cooling system was drained priorto
shipment. Fill cooling system before starting.
Nominal capacity is 5 gallons. For units using eithera
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 John Deere engine manual for
additional information.
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1. Verify that the electric solenoid valve used
L^^^^^^X
with city water cooled plants is open before
initial starting of plant 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.
3. Be careful when checking coolantunderpressure. Itis advisable
to shut engine down and bleed off pressure before removing
pressure cap. Severe burns could result from contact with hot
coolant.
Fuel System: Refer to the John Deere engine manual
for fuel oil specifications. Check with fuel supplier
and ensure that fuel supplied meets the
specifications. Filter or strain fuel when filling tank.
Fuel supply tanks should be kept as nearly full as
possible by topping up each time engine is used.
Warm fuel returning from the injector pump heats the
fuel in the supply tank. If the fuel level is low in cold
weather, the upper portion of the tank not heated by
returning fuel tends to increase condensation. In
warm weather both the supply tank and fuel are warm.
Cool nightairlowersthetemperatureof thetank more
rapidly than the temperature of the
fuel.
Again this
tends to increase condensation.
Condensate mixing with the sulphur in the fuel forms
a sulphurous acid which will corrode and damage the
engine. KEEP FUEL CLEAN.
WARNING
DO NOT SMOKE while handling
fuel.
Diesel
fuel is flammable.
Priming Fuel System: Verify that all connections in
the fuel system are secure and no leaks exist. Proceed
with priming as follows:
1.
Loosen bleed plug on top of fuel filter. Pump
primer lever (Figure 18) until a solid stream of
fuel,
free of air bubbles, flows from bleed plug.
2.
Secure bleed plug.
3. Loosen inlet fuel line on injector pump. Operate
primer lever on fuel transfer pump until a solid
stream of
fuel,
free of air bubbles, flows from inlet
line opening.
4.
Secure injector pump fuel inlet line.
5. Leave fuel transfer pump priming lever at lowest
point of stroke.
18
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