Service and Maintenance
PRE-STARTING
Preparations for the initial and each additional start-
ing operation should includecareful checks of the oil,
fuel, cooling, and electrical systems.
Before engine is put in operation, check all compo-
nents for mechanical security. If an abnormal condi-
tion, defective part, or operating difficulty is detected,
repair or service as required. The engine should be
kept free of dust, dirt, and spilled oil or fuel. Be sure
proper operating procedure is followed.
Crankcase
Oil
Multi-grade oils (such as 5W-30) are recommended
for service in ambient temperatures of 32OF and
colder. On Onan
J
Diesel liquid cooled engines,
SAE
15W-40 or 20W-40 oils (CD/SE Service Designation)
may be used
in
an ambient temperature range of
15OF
(-10°C)
through
90°F
(32OC). Refer to the oil chart
below for recommended viscosity grades at various
temperature ambients.
Use oil with an
API
classification of CD/SE (all viscos-
ity grades) or
CC/SE
(grades
1OW-30,
1OW-40,
or
5W-30
only).
When adding oil between oil changes,
it
is preferable
to use the same brand, as various brands of oil may
not be compatible. Refer
to
Maintenance Schedule
for recommended
oil
change intervals and pro-
cedures.
Crankcase pressure could blow out
hot
oll
and cause seflous,burns.
Do
NOT
check oil while the engine
is
operating.
Recommended
Fuel
Use
ASTM
2-D or 1-D fuel with a minimum Cetane
number of
45*.
Number 2 diesel fuel gives the best
economy for most operating conditions; however,
use
ASTM
1-D
fuel during the following conditions:
1.
When ambient temperatures are below 32"
F
2. During long periods of light engine load; or no
(OOC);
load.
*NOTE
Fuels with Cetane numbers higherthan45 may beneeded
in higher altitudes or when extremely low ambient temperatures
are encountered to prevent misfires.
Use low sulfur content fuel having a pour point
(ability to filter) of at least
10°F
below the lowest
expected temperature. Keep the fuel clean and pro-
tected from adverse weather. Leave some room for
expansion when filling the fuel tank.
Due to theprecise tolerances ofdie-
sel injection systems, it
is
extremely
important the fuel be kept clean.
Dirt
in the system
can cause severe damage to both the injection pump
and the injection nozzles.
WORK TRANSFER PUMP
PRIMING LEVER UNTIL
FUEL FLOWS FROM
RETURN
LINE FITTING
OF INJECTION
PUMP.
FIGURE
1.
BLEED
FUEL
SYSTEM
If
the camshaft pump lobe is up, crank engine one revolution
to
permit hand priming. When finished, return priming lever inward
(disengaged position)
to
permit normal pump operation.
8
Redistribution or publication of this document,
by any means, is strictly prohibited.
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