Bleeding
Fuel
System
Bleed air from fuel system as follows: Disconnect fuel
return line, Figure
1-
Operate
hand
priming lever on
fuel transfer pump until fuel flowing from fuel return
line is free of air bubbles. Then reconnect the fuel
return line.
PRE-HEATING AND STARTING
BEFORE
STARTING:
CHECK FUEL SUPPLY.
BE SURE SHUTOFF VALVES ARE OPEN.
.
I
I
PRIME FUEL SYSTEM
IF
FUEL FILTERS WERE DRAINED
OR
CHANGED.
SYSTEM WAS JUST INSTALLED. FUEL TANK RAN
DRY.
--
TO PRIME FUEL SYSTEM:
MOVE PRIMING LEVER UP
AND DOWN UNTIL FUEL
FLOWS STEADILY FROM
NECTED).
RETURN LINE (DISCON-
?*
-
FUEL FILTERS
FUEL TRANSFER
PUMP
PRIMING LEVER
FUEL RETURN LINE
Preheating for
60
seconds is recommended
on
all
DJ-Series Diesels at
55°F
(13°C)
or lower, and
30
seconds for temperatures above
55"
F
(13°C).
Refer
to Onan Dieselstarting Guide, for additional starting
guidelines.
inhalation of exhaust gases might
i
resuit in serious personal injury or
death. Be sure deadly exhaust gas is piped outside
and away from windows, doors, or other inlets to
building.
-_
-
WARNING
Use of ether as a starting aid might
cause an explosion resulting in
severe personal injury and engine damage.
Do
not
use ether as a starting aid; heat or compression or
heat from the glow plugs may cause a sudden ignition
of the ether vapor.
1.
Engage PREHEAT switch for the time period
recommended below:
30
seconds if above
55OF
(13°C)
-
60
seconds if below 55°F
(13°C).
2.
Engage START switch while continuing preheat.
3.
If engine fails to start in 15-20 seconds, repeat
Hold until engine comes up to speed.
To
START:
4.
5.
1.
2.
PREHEAT COLD ENGINE PUSH PREHEAT SWITCH AND HOLD
-
30
SECONDS IF ABOVE 55-F
(13
C):
60
SECONDS IF BELOW 55.F (13°C).
NEVER PREHEAT MORE THAN
60
SECONDS.
steps
1
&
2-
Absence of blue exhaust smoke dur-
ing
cranking indicates no fuel being delivered.
Determine cause.
In
extreme cold
it
may be necessary to maintain
preheating up to
2
minutes after the engine starts
to obtain firing or to smooth out all cylinders,
especially at no load or light loads.
To
prevent heater burnout and
conserve baftery, do not exceed
the one minute preheat periods. Longer preheat-
ing time prior to cranking the engine can ruin the
manifold heater and glow plugs because there is
no incoming air flow to cool them. Additional
operation of the preheaters for a few seconds
during cranking in cold weather may help to pre-
heat the incoming combustion air and prevent
misfires as the engine starts running.
Verify that oil pressure gauge reads at least
20
psi
after engine reaches speed (pressure relief valve
is not adjustable).
Do
not apply overvoltage to the
starting circuit at any time.
Overvoltage will destroy the glow plugs and air
heater.
if
it becomes necessary to use an addi-
tional source of power to start the set, use a
72
volt battery connected in parallel.
STOPPING
Push fuel solenoid switch to Stop position.
Release switch when set stops. If stop circuit fails,
close fuel valve.
CAUT,ON
IF ENGINE FIRES BUT DOES NOTSTART. REPEATABOVEPROCEDURES. INCLUDING
PREHEAT. LIMIT CRANKING
TO
15
TO
20
SECONDS TO CONSERVE BATTERY. IF
ENGINE STILL DOES NOT START. SEE-IF ENGINE FAILS TO START INFORMATION.
<
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