OPERATION
GENERAL
Onan DYC 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 damagewhich may haveoccurred in transit.
Tighten loose parts, replace missing parts and repair
any damge 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. For all operating conditions grade CD
lubricating oil is recommended for turbocharged
engines. Do not mix brands nor grades of lubricating
oils.
Oil Viscosity should be as follows:
AMBIENT TEMPERATURE
USE SAE VISCOSITY
0
o
F (-17.8
0
C) and below
0
o
F to 32° F (-17.8
0
C to 0
o
C)
Above 32° F (0
o
C)
iow
20-20W
30W
Oil Capacities (nominal)
Oil Pan and Filter—31 quarts (29.3 litres) 75, 90 kw
Oil Pan and Filter—31 quarts (29.3 litres) tookw
Oil quantity dipsticks have dual marking with high and low-level
marks: static oil level on one side and engine at low speed marks on
opposite side. Be sure to use proper scale (see Figure 21).
Cooling System: Cooling system was drained priorto
shipment. Fill cooling system before starting.
Nominal capacity is 8.5 gallons (32.17 litres) for 75,
90 kW and 9 gallons (34.11 litres) for 100 kW. 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. Referto Allis-
Chalmers engine manual for additional information.
CAUTION
1.
Verify that the electric solenoid valve used
with city water cooled sets is open before
initial starting of unit to allow coolant chambers to
fill.
Overheating
and damage to the engine could result from noncompliance.
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
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 System: Refer to the Allis-Chalmers 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 damagethe
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 filter vent screw (Figure 22).
2.
Using hand pump (Figure 22), prime system until
fuel flow around filter vent screw is free of
bubbles.
. 3. Secure vent screw and hand pump.
Ensure that hand primer pump is screwed in and secured before
attempting to start engine.
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.
22
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