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TM 10-3930-659-20
16-11. HEATER CORE REPLACEMENT.
This task covers:
a.
Removal
b.
Installation
INITIAL SETUP:
Equipment Conditions:
Materials/Parts:
• Engine cooling system drained (see paragraph
•
Rags (Item 27, Appendix C)
5-38).
• Cab fresh air filter door opened (see TM 10-3930-
References:
•
Cab rear panel removed (see paragraph 14-22).
Tools/Test Equipment:
General Safety Instructions:
• General mechanic's tool kit (Item 44, Appendix F)
•
DO NOT perform heater core maintenance unless
engine is cold.
NOTE
A suitable container should be used to catch any draining antifreeze. Ensure
that all spills are properly cleaned.
a.
REMOVAL
WARNING
Replacement of heater core should only be performed when engine Is cool.
NEVER remove clamps or heater hoses when engine Is hot. Pressurized
steam, hot water, or coolant will cause serious burns.
1.
Loosen two clamps (7) and remove water lines (6) from heater core (3).
2.
Remove three screws (5), washers (4), and heater core (3) from heater housing (1).
3.
If damaged, remove three seals (2) from heater housing (1).
b.
INSTALLATION
1.
If removed, apply adhesive (Item 1, Appendix C) to three seals (2) and install seals on heater housing (1).
2.
Install heater core (3) on heater housing (1) with three washers (4) and screws (5).
3.
Install two water lines (6) on heater core (3) and tighten two clamps (7).
16-36
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