OPERATION
GENERAL
Onan DEH 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 loosie 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.-
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-Dorset
engine manual for additional informatioh.
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 most operating conditions grade
CC/DC lubricating oil is recommended. Do not mix
brands nor grades of lubricating oils.
Oil viscosity should be as follows:
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 I
Be
careful when checking coolant under
'^•^^HBBMHJ
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.
AMBIENT TEMPERATURE
USE
SAE
VISCOSITY
Below -10
o
F (-23° C) -
5W-20 -
-10° F to +40° F (-23° C to 4.5° C)
10-10W
40°
F
to
70° F
(4.5° C to
21°
C)
20-20W
70°
F
to 100°
F
(21
0
C to 38°
C)
30
90° F and above (32° C)
40
Oil Capacities (nominal)
Oil Pan and Filter—9.5-quarts (9.0 litres)
Cooling System: Cooling system was drained priorto
shipment. Fill cooling system before starting.
Nominal capacity is 16-quarts (15-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
Fuel System: Refer to the Ford-Dorset engine manual
fpr 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.
22
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