Fuel System Operation and Tests
BLEED THE FUEL SYSTEM
CAUTION: Escaping fluid under pressure can
penetrate the skin causing serious injury. Avoid
hazards by relieving pressure before
disconnecting hydraulic or other lines. Tighten
all connections before applying pressure.
Search for leaks with a piece of cardboard.
Protect hands and body from high pressure
If an accident occurs, see a doctor immediately.
Any fluid injected into the skin must be
surgically removed within a few hours or
gangrene may result. Doctors unfamiliar with
this type of injury may call the Deere &
Company Medical Department in Moline, Illinois,
or other knowledgeable medical source.
Any time the fuel system has been opened up for service
(lines disconnected or filters removed), it will be necessary
to bleed air from the system.
The fuel system may be bled at one of several locations.
On some engine applications it may be necessary to
consult your operator's manual and choose the location
best for your engine/machine application.
1. Open air bleed vent screw (A) two full turns by hand.
2. Pump the hand primer (if equipped) on filter mounting
base until a noticeable amount of fuel and air comes
out of vent opening. Continue pumping and close vent
screw when fuel starts to flow.
3. Pump the hand primer several times until resistance is
felt. Continue pumping and open air bleed vent screw
A--Bleed Vent Screw
4. Close air bleed vent screw and pump the hand primer
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