Lull 944E-42, Service Manual

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7.23 Model 644E-42/944E-42 Rev. 6/04
Engine: Cummins 4BT 3.9, B4.5T and QSB 4.5T
7.7 ENGINE ELECTRICAL SYSTEM
The engine electrical system, including the starter,
alternator and primary wiring, is described in Section
9.11, “Engine Start Circuit,” and Section 9.12, “Charging
Circuit.”
7.8 FUEL SYSTEM
The fuel system for both the 644E-42 and 944E-42
includes: a fuel tank (13), fuel level sender with gasket
(14), dash panel gauge, fuel strainer (15), fuel lift pump
(20) or (21), fuel filter (19) or (22), fuel supply hose (17),
fuel return line (18) and fuel tank drain plug (24).
The threaded fuel filler (23) has a fuel cap (16) and
permits entry of diesel fuel into the tank.
The fuel level sender (14) and dash panel gauge are
described in Section 9.14.17, “Fuel Level Gauge and
Fuel Level Sender.”
A fuel supply hose (17) carries fuel from the tank to the
engine lift pump (20) or (21) and then under pressure to
the fuel filter (19) or (22). Filtered fuel is directed to the
fuel injection pump and to the individual fuel injectors.
Surplus fuel at the fuel injector pump is returned to the
tank via the fuel return line (18).
MU5220
13
14
15
16
17
18
19
20
17
23
24
644E-42
944E-42
15
17
17
21
22
18