10-6. CAB HEATER SYSTEM MAINTENANCE
a. H e a t e r.
This task covers removal, disassembly, cleaning, inspection, reassem-
b l y , a n d i n s t a l l a t i o n o f t h e c a b h e a t e r.
TOOLS: No. 1 Common Organizational Maintenance Tool Kit
Fixed open end wrench set
Socket wrench set, 3/8 inch drive
Socket head screw key set
E l e c t r i c a l r e p a i r t o o l k it
MATERIALS/PARTS: Clean cloths (Appendix C, item 1)
Cleaning solvent P-D-680 (Appendix C, item 2)
Detergent (Appendix C, item 3)
Insulation tape (Appendix C, item 5)
Adhesive (Appendix C, item 8)
PRELIMINARY PROCEDURE: Engine side panels removed (page 9-14), heater
w a t e r s h u t - o f f v a l v e s c l o s e d a t w a t e r p u m p a n d e n g i n e b l o c k , b a t t e ry
ground cable disconnected (page 5-148), and operators seat upper seat
support removed from cab (page 9-31).
At bottom of heater, disconnect spade terminal (1) from heater black wire
spade terminal (2) by grasping terminals with your fingers and pulling
Disconnect wiring harness white wire spade terminal (3) from heater
orange wire spade terminal (4).
Loosen clamps (5, 6, and 7).
Remove tube (8) by pulling from hoses (9 and 10). Remove clamps (6 and
7 ) .
Remove hose (9) by pulling from heater (18) port. Remove clamp (5).
Loosen clamp (11) and disconnect hose (12) by pulling from heater (18)
port. Remove clamp (11).
Remove four nuts (13), lock washers (14), capscrews (16), and washers
(17) while supporting heater (18). Remove heater from heater console.
Remove wire lead (15).