Fuel System Bleed - Kohler 6EKOD Operation Manual

3.4.3

Fuel System Bleed

Bleed air from the fuel system in order to reduce rough
running or vapor lock. Trapped air in the fuel system can
cause difficult starting and erratic engine operation.
Prime the fuel system under the following conditions:
Before starting the engine for the first time.
D
After running out of fuel and adding fuel to the tank.
D
After fuel system maintenance such as changing the
D
fuel filter, draining the fuel/water separator, or
replacing a fuel system component.
Fuel System Bleed Procedure (Preferred)
Note: To prevent damage to the starter motor, do not
crank the engine to prime the fuel system. Use
the following procedure.
1. Push the power button on the Advanced Digital
Control IId to the ON position.
2. When the run time hours appear on the LCD digital
display, rotate the pushbutton/rotary selector dial
until "PUSH TO PRIME" appears on the LCD digital
display.
3. Push the pushbutton/rotary selector dial.
4. Rotate the pushbutton/rotary selector dial to
"CONFIRM PRIME: Yes".
5. Push the pushbutton/rotary selector dial to begin
the fuel priming procedure. A 30 second priming
sequence begins automatically. If necessary, push
the control knob to stop the priming procedure
before the 30 seconds are up.
1
PUSH TO
PRIME
3
1. LCD digital display
2. Pushbutton/rotary selector dial
3. Power button
Figure 3-4 Advanced Digital Control II
TP-6772 2/14b
Typically, running the Prime function on the ADC IId is all
that is required. If rough operation continues, use the
following procedure to open the air bleed valve on the
fuel filter.
Note: Connect the battery during the priming procedure
to allow engine cranking.
Note: If the ADC IId indicates an overcrank fault during
this procedure, disconnect the negative wire from
the fuel solenoid (allowing the fuel injection pump
to fill with fuel) and repeat this procedure after
allowing the starter motor to cool down.
Note: Have a rag handy during this procedure. Wipe up
any spilled diesel fuel. Wash hands after any
contact with fuel.
environmentally safe manner.
Fuel System Bleed Procedure
1. Loosen the fuel filter's air vent screw.
Figure 3-5.
2. Initiate the auto/start sequence until fuel, free of air
bubbles, flows from the vent screw at the fuel filter.
3. Tighten the fuel filter's air vent screw.
2
1. Fuel filter's air vent screw location
Figure 3-5 Fuel Filter's Air Vent Screw
GM58225A
Dispose of fuel in an
1
Section 3 Scheduled Maintenance
See
GM74543-B
49