John Deere POWERTECH 4045 - Manual (Page 188)

Service as Required
OURGP11,000000E –19–27JUL06–2/3
RG11719A
–UN–20JUN01
Bleed Fuel System
A—Bleed Orifice in Final Fuel Filter Base
B—Fuel Return Line
IMPORTANT: NEVER pressurize the fuel tank to prime
the fuel system as it could rupture seals
in the injection pump.
Bleed Using Electronic Transfer Pump
The bleed is automatically performed by a small orifice (A)
inside the final fuel filter base connected to the overflow
valve on injection pump. The system allows air to escape
continually through the fuel return line (B) when ignition is
ON.
1. Ignition ON.
2. Allow 40 seconds for electronic transfer pump to
complete priming.
3. If additional system bleeding is required, bleed the
circuit by loosening fuel line connections at injection
nozzles. See the next procedure, BLEED FUEL SYSTEM
AT FUEL INJECTION NOZZLES.
OURGP11,000000E –19–27JUL06–3/3
RG7725
–UN–08JAN97
Bleed At Fuel Injection Nozzles
Bleed Fuel System at Fuel Injection Nozzles
IMPORTANT: Always use a backup wrench when
loosening or tightening fuel lines at
nozzles and/or injection pump to avoid
damage.
1. Using two open-end wrenches, loosen two fuel line
connections at injection nozzles.
2. Crank engine over with starter motor for 15 seconds
(but do not start engine) until fuel free from bubbles
flows out of loosened connection. Retighten connection
to specifications.
Specification
Fuel Injection Nozzle Delivery
Line—Torque
27 N•m (20 lb-ft) ...................................................................
3. Repeat procedure for remaining injection nozzles (if
necessary) until all air has been removed from fuel
system.
40-13
080706
PN=186