ENGINE COOLANT HEATER LINES (OPTIONAL) (2)

TM 5-2420-222-20-1

COOLING SYSTEM - CONTINUED

Route coolant from engine block coolant passages to optional coolant heater, and back to cylinder head coolant

passages.

ENGINE COOLANT HEATER (OPTIONAL)

Keeps coolant warm during extremely cold weather when engine is not running, to make it easier to start.

ELECTRICAL SYSTEM

To keep things simple, the following descriptions single out related items in the electrical system as separate circuits.

Keep in mind that all of these circuits are interconnected with each other to form the entire electrical system. Electrical

circuits for loader backhoes with Serial Numbers 319995 thru 342573 are shown, circuits for loader backhoes with Serial

Numbers 235786 thru 235999 are similar. See Section XII, Electrical System (page 2-435), for electrical system

schematic diagrams.

TA242686

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