Service and Maintenance
PRE-STARTING
Preparations for the initial and each additional star-
ting operation should include careful checks of the
oil, fuel, cooling, and electrical systems.
Before engine is put in operation, check all com-
ponents for mechanical security. If an abnormal
condition, defective part, or operating difficulty is
detected, repair or service as required. The engine
should be kept free of dust, dirt, and spilled oil orfuel.
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
15"
F
(-10°C) through 90°F (32°C). Refer to the oil chart
below for recommended viscosity grades at various
temperature ambients.
I I
I
1
I
I
0
20
.
40
'
60
80
100
-2b
-10
0
10
-20
30
40
ERATURE RANGE YOU EXPECT BEFORE NEXT
OIL
CHANGE
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 together. Refer to the Operator
and Service Maintenance Schedule on page
11
for
recommended
oil
change intervals and procedures.
WARNING
Crankcase pressure could blow
out
m
hot oil and cause serious 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 32OF
2. During long periods of light engine load; or no
(0"
C);
load.
"NOTE: Fuels with Cetane numbers higher than
45
may be needed
in higher altitudes or when extremely low ambient temperatures
are encountered to prevent misfires.
Use low sulfur content fuel having apourpoint (ability
to filter) of at least 10" below the lowest expected
temperature. Keep the fuel clean and protected from
adverse weather. Leave some room for expansion
when filling the fuel tank.
Due
to
the precise tolerances of die-
sei injection systems, it
is
extremely
important that the fuel be kept clean. Dirt in the
sys-
tem 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 INlECTlON 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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