How To Eliminate Air From The Fuel System - Perkins 3000 Series User Handbook Manual

How to eliminate air from the fuel system

If air enters the fuel system, the injection pump
pressure may become insufficient to operate the
injector valves and the engine may stop, misfire or fail
to start.
To eliminate air from the system, use the relevant
procedure which follows:
Low pressure system
1 Loosen the low pressure relief valves (A1) on the
fuel injection pump and operate the priming plunger
(B1) of the fuel lift pump. When fuel, free from air,
flows from the relief valves, tighten the unions.
2 Clean away fuel that has been spilled.
High pressure system
Air in the high pressure system must be released at
the injectors.
1 Move the stop control to the RUN position and
operate the starter motor.
2 Loosen the nut of the high-pressure fuel pipe at one
of the injectors. When fuel, free from air, is released,
tighten the nut to a torque of 45 Nm (33 lbf ft). DO
NOT OVERTIGHTEN.
Warning! Ensure that fuel does not spray onto your
skin.
3 Repeat the procedure for the remainder of the fuel
injectors.
4 If the engine starts during this operation but runs
erratically, continue to eliminate air from each injector
until the high pressure system is free from air or until
the engine runs correctly.
5 Return the stop control to the STOP position.
6 Clean away any fuel that has been spilled.
This document has been printed from SPI². Not for Resale
1
A
B
4
71
1
72
27