Lull 944E-42 Service Manual - Manual (Page 223)

7.21 Model 644E-42/944E-42 Rev. 6/04
Engine: Cummins 4BT 3.9, B4.5T and QSB 4.5T
c. Engine Block Heater Removal
1. Park the vehicle on a firm, level, surface. Level the
vehicle, ground the attachment, place the travel
select lever in the (N) NEUTRAL DETENT position,
engage the parking brake switch and shut off the
engine.
2. Secure accident prevention tags to the steering
wheel and ignition switch. (Refer to Section 1.5,
“Accident Prevention Tag Usage.”)
3. Unlatch and open the engine cover. Allow the engine
to cool before proceeding. Draining the cooling
system while the engine is hot can cause cracks in
the engine block.
4. If the vehicle has dual batteries, disconnect both
negative battery cables (8 and 9) from both
batteries.
To access the lower battery (10), loosen the knob
(13) far enough so that the lip (12) on the upper
battery box clears the knob. Lift up the upper battery
box (11) and swing it out, so that the box clears the
hydraulic tank support bracket, to gain access to the
lower negative battery cable (8). Disconnect the
lower negative battery cable.
5. Slowly turn the radiator cap (14), (located near the
upper radiator hose), to the first stop and allow any
pressure to escape. Remove the radiator cap.
6. Place a hose (15) onto the drip leg of the petcock,
located at the base of the radiator to channel the
drained coolant into a container. Open the radiator
petcock (16) and allow the coolant to drain into the
funnel. Transfer the coolant into a properly labeled
container. Dispose of properly. Close the radiator
petcock (16) when finished and remove the
hose (15).
WARNING:
DO NOT attempt this
procedure when the engine is hot. Wait for the
engine, muffler, and tailpipes to cool down
before proceeding. Failure to do so could result
in severe burns.
WARNING:
Hot coolant can cause
severe burns or eye injury. NEVER remove the
radiator cap while the engine is hot. The
cooling system is under pressure. Wear
protective clothing and safety glasses.
MU1440
14
MU1390
15
16