Bleed The Fuel System; 4045 Engines With Mechanical Fuel System - Doosan G60-SIIIA Operation & Maintenance Manual

MAINTENANCE / 2000 HOURS / 2 YEARS (CONT'D)

BLEED THE FUEL SYSTEM

WARNING
Escaping fluid under pressure can penetrate the skin
causing serious injury. Relieve pressure before
disconnecting fuel
connections before applying pressure.Keep hands
and body away from pinholes and nozzles which
eject fluid under high pressure.Use a piece of
cardboard or paper to search for leaks. Do not use
your hand.
If ANY fluid is injected into the skin, it must be
surgically removed within a few hours by a doctor
familiar with this type of injury 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.
NOTE: 4045, and 6068 engines have two fuel filters
(primary and final). Whenever the fuel system
has been opened up for service (lines
disconnected or filters removed), it will be
necessary to bleed air from the system. On
dual fuel filter system, bleed air only from final
filter.

4045 Engines with Mechanical Fuel System

Figure 66: Fuel Filter Bleed Screw
A Air Bleed Screw
or other lines.Tighten
B Fuel Pump Primer Lever
1. Loosen the air bleed screw (A) two full turns.
2. Operate fuel pump primer lever (B) until fuel flow is
free from air bubbles.
3. Tighten bleed screw securely, continue operating
all
hand nozzles as explained next. primer until pumping
action is not felt.
4. Start engine and check for leaks.
If engine does not start, it will be necessary to bleed
air from fuel system at fuel injection pump or injection
5. At Fuel Injection Pump:
a. Slightly loosen fuel return line connection (C) at
fuel injection pump.
b. Operate fuel pump primer lever until fuel, without
air bubbles, flow from fuel return line connection.
c. Securely tighten return line connection.
Figure 68: Mechanical Injection Pump Return Line
C Fuel Return Line Connection
61 G60, G80, G100, G150, G200-SIIIA OM Manual