TM 9-6115-668-13
12. Loosen clamp (16), pull fuel supply line (15) off fitting on heating unit (12) and tie up.
13. Loosen clamp (13), pull fuel return line (14) off fitting on heating unit (12) and tie up.
14. Lift heating unit (12) out of brackets (11) and remove clamp straps (7).
TEST
1.
Start up engine preheating assembly as instructed in paragraph 2.5.1.
2.
Open flap (2, figure 5-43) and check that hot air is being blown onto V belts.
3.
Open flap (2, figure 5-27) and front panel (4) of control cabinet assembly (3) and check that mounting
plate (36) behind speed governor assembly N1 (31) is being heated.
INSTALLATION
1.
Insert clamp straps (7, figure 5-43) into brackets (11).
2.
Place heating unit (12) in clamp straps (7) and turn onto left side.
3.
Slide fuel return line (14) on fitting of heating unit (12) and tighten clamp (13).
4.
Slide fuel supply line (15) on fitting of heating unit (12) and tighten clamp (16).
5.
Install screws (8), serrated lock washers (9), and washers (10).
6.
Hook in clamp strap closures (7) and tighten screws (6) of clamp strap closures (7).
7.
Place air inlet pipe (26) with clamp (25) on heating unit (12) and tighten screw on clamp (25).
8.
Insert exhaust manifold (32) into exhaust intermediate pipe (36) and place on heating unit (12) with clamp (31)
and seal (30).
9.
Tighten screw on clamp (31).
10. Tighten screws (35) onto exhaust intermediate pipe (36).
11. Slide air hose (29) onto fitting of heat exchanger box (3) and tighten clamp (28).
N O T E
Do not run cable under clamp straps.
12. Insert plug connector X103 (27) into rear of heat exchanger box (3).
13. Place grounding strap (18), washer (19), serrated lock washer (20), and washer (21) on threaded pin (17) and
screw on nut (22).
14. Place cable J102 (23) on plug connector X102 on connector box (24) of heating unit (12).
N O T E
Exhaust manifold and exhaust intermediate pipe must be aligned.
15. Align heating unit (12) and tighten locknuts (34) on exhaust intermediate pipe (36).
16. Install unit hood assembly (1) as instructed in paragraph 4.14.
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