Lull 944E-42 Service Manual - Manual (Page 751)

9.241 Model 644E-42/944E-42 Rev. 6/04
Electrical System
9.14.16 Engine Block Heater
The engine is equipped with an engine block heater (12)
that can be plugged into a standard 110/120V A.C.
grounded outlet to heat the engine coolant. When
temperatures are below 10° F (-12° C), the block heater
should be used.
a. Engine Block Heater Testing
Note: The following test should be performed with a
cold engine.
The engine block heater unit (12) can be tested on the
machine by plugging the 110 volt cord (13) into a 110 volt
outlet. After 20 to 30 minutes, place your hand on the
engine block (14) next to the heater. If the heater element
is functioning properly, you will feel the heat at that
location. If the block is cold, the heater element is
defective and should be replaced.
b. Engine Block Heater Removal
For instructions for removing the engine block heater,
refer to Section 7.6.4, c. “Engine Block Heater Removal.”
c. Engine Block Heater Disassembly
DO NOT disassemble the heater element (12). Replace
a defective or faulty heater with a new part.
d. Engine Block Heater Inspection and
Replacement
Inspect the block heater element (12) and the 110 volt
cord (13) for cuts or exposed wires. Replace a defective
or faulty block heater.
e. Engine Block Heater Installation
For instructions for installing the engine block heater,
refer to Section 7.6.4, d. “Engine Block Heater
Installation.”
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