Lull 944E-42 Service Manual User Manual download pdf (Page 223)

100

101

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

MU1390

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