John Deere CD4039DF008 - Manual (Page 39)

Operating the Engine
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Air intake heater
Air intake heater is either a grid-type (A) for POWERTech
engines or a glow plug-type (B) for 300-Series engines
installed in the air intake channel.
CAUTION: NEVER use Ether Starting Fluid
when air intake heater is used to start the
engine.
Activate the heating element (preheater position) for
30 seconds maximum then start the engine.
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Coolant heater
Connect plug of coolant heater (A) to a power source (110
or 220 V).
At an ambient temperature of -15
°
C (5
°
F), the heating
process takes approximatively 2 hours. Extend heating
period if ambient temperature is lower.
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Fuel preheater
Fuel preheater (A) switches ON and OFF automatically in
relation to the ambient temperature.
15-2
112699
PN=39