Lull 944E-42 Service Manual - Manual (Page 224)

Engine: Cummins 4BT 3.9, B4.5T and QSB 4.5T
7.22 Model 644E-42/944E-42 Rev. 6/04
7. Loosen the clamp (1) securing the air intake hose to
the turbocharger, but do not remove.
8. Disconnect the air intake sensor (2)
(1/4" quick-disconnect.)
9. Loosen both hex bolts (3) securing the air cleaner
mounting band to the firewall enough to allow the
hex bolts to slip from the mounting band. Remove
the air cleaner assembly.
10. Remove the knurled retainer (4) from around engine
block heater element (5) and 110 volt cord (6). Using
a 29 mm socket, remove heating element from
engine block.
d. Engine Block Heater Installation
1. Apply Teflon tape to engine block heater element
threads (5) and install element. DO NOT over
tighten. Plug-in 110 volt cord (6) into heater element
and install the knurled retainer (4) around coolant
heater element and 110 volt cord (6).
2. Position the air cleaner hose over the turbocharger
intake opening. Install the air cleaner, aligning the
mounting band with the firewall, sliding the hex
bolts (3) into the slots. Torque mounting hex bolts to
11-19 lb-ft (15-25 Nm). Torque the air cleaner hose
clamp (1) to 75 lb-in (8,7 Nm). Reconnect air intake
sensor (2).
3. If the vehicle has dual batteries, connect both
negative battery cables (7 and 8) to both batteries.
Connect the lower negative battery cable (7) to the
negative (-) terminal on the lower battery (9). Swing
the upper battery box (10) in and make sure that the
lip (12) on the upper battery box slides below the
knob (11). Secure in place with the knob (11).
4. Refill the cooling system. Refer to Section 7.6.3,
“Drain and Flush Radiator,” for procedures of refilling
the cooling system.
5. Run the engine to operating temperature. Visually
check for leaks with the engine running. Check the
coolant level in the overflow bottle and fill, or drain,
as necessary.
MU1770
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MU1720
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MU0650
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