Onan DYG Series Operator's Manual And Parts Catalog page 29

V E N T SCREWS
Ist STAGE F I L T E R
Batteries • " • .
Ensure that the cable connections to the batteries are j
FIGURE 25. FUEL FILTERS
Priming Fuel System: Verify that all connections in
the fuel system are secure and no leaks exist. Proceed
with priming as follows:
1. Loosen 2nd stage filter vent screw (Figure 25).
2. Using hand pump(Figure 26)i, prime system until
fuel flow around filter vent screw is free of
bubbles.
3. Secure vent screw and hand pump.
To bleed fuel injection pump sump refer toFigure 26.
Disconnect fuel line from overflow valve and actuate
hand primer. Continue pumping until fuel flow from
valve is free of bubbles. Reconnect fuel line to
overflow valve.
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.
secure. Coat connections with petroleum based or
FIGURE 26. FUEL INJECTION SYSTEM
non-conductive grease to retard formation of cor- j
rosive deposits.
Check level of electrolyte to be at split ring mark. .
Measure specific gravity of electrolyte: SG 1.280 at !
SOF (26C). If distilled water has been added or
specific gravity is less than 1.280, place batteries on
charge until desired reading is reached. Do not over
charge.
STARTING
When the preceding service functions have been
performed, recheck to verify unit is ready to start.
1. Crankcase filled.
2. Cooling system filled—inputsolenoid valveopen.
3. Batteries charged and connected.
4. Fuel solenoid valve open.
To start, move the "run-stop/reset-remote" switch to
the "run" position. The engine should start afterafew
seconds of cranking. Immediately after start, observe
the oil pressure gauge. Normal oil pressure is
between 30 and 55 psi (207- and 379. kPa). Check the .
following gauges:
1. DC Ammeter—10 to 30 amperes.
2. AC Voltmeter—AC generator output voltage.
3. Frequency Meter—AC generator output frequen-
cy.
After running 10 minutes under load the water
temperature gauge should have stabilized at 180° to
195° F (82.2°- to 90.6° C). On city water cooled units
an adjustable valve is connected in the water supply
line. Adjust the hand wheel valve to provide a water
flow that will keep the water temperature gauge
reading within the range of 180° F to 200° F (82.2° - to
93.3° C).
STOPPING
To reduce and stabilize engine temperatures, run the
engine at no load for three to five minutes before
shutting down. This will prevent damage to the
turbocharger.
Move the run-stop/reset-remote switch to stop posi-
tion to shut down the set.
Break-In Note: Run set at 50 percent rated load forthe
first half-hour of initial operation after reaching
operating temperature.
Non-Start: If after a few seconds of cranking engine
fails to start, or starts and runs then stops and fault
lamp lights, refer to appropriate troubleshooting
chart, Table 4 or Table 5.
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