Lull 944E-42, Service Manual

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7.13 Model 644E-42/944E-42 Rev. 6/04
Engine: Cummins 4BT 3.9, B4.5T and QSB 4.5T
6. Flush the radiator with clean water and allow to drain
again. Upon completion, close the petcock (9) and
then remove the hose (8).
7. Transfer the coolant into a properly labeled
container. Dispose of properly.
8. Drain the contents of the overflow reservoir (10) by
removing the overflow tube (11) from the radiator.
The lower portion of the tube is connected to the
overflow reservoir. Use the tube to channel the
coolant into a container. Transfer the coolant into a
properly labeled container. Dispose of properly.
Reconnect the overflow tube to the radiator upon
completion.
9. Fill the radiator completely with a 50/50 mixture of
ethylene glycol and water. Replace the radiator cap.
Add coolant to the overflow bottle until the bottle is
1/2 to 3/4 full. This “overfilling” will compensate for
any air in the cooling system.
10. Clean any dirt or debris from the radiator fins and
core.
11. If the vehicle has dual batteries, connect both
negative battery cables (1 and 2) to both batteries.
Connect the lower negative battery cable (1) to the
negative (-) terminal on the lower battery (3). Swing
the upper battery box (6) in and make sure that the
lip (5) on the upper battery box slides below the
knob (4). Secure in place with the knob (4).
12. Start the engine and run the vehicle to normal
operating temperature, then shut off the engine.
While the engine is cooling, check for leaks.
13. Allow the engine to cool. Check the radiator coolant
level again, and top off with a 50/50 mixture of
ethylene glycol and water. Replace the radiator cap.
14. The overflow bottle should be 1/4 to 1/2 full. If not, fill
to this level with 50/50 mixture of ethylene glycol and
water.
MU1390
8
9
MU1380
10
11