TB 9-6115-644-13
24.
Open control panel access door (1), Figure 5-8.
25.
Locate operating instruction plate (2) and heater function codes plate (3) and match drill holes in control panel access
door (1). Plates shall be readable when the door is open.
26.
Install rivets (4). Rivet head shall be to the outside of the unit.
27.
Remove toggle switch (5) and wire 172A from TB5-9 and wire 190D from TB6-8. Tie back switch and wires in
harness with straps contained in kit.
28.
Locate heater switch label (7), with existing hole for switch, and match drill hole in control panel (8) for
indicator light (6).
29.
Install heater switch label (7), indicator light (6), and toggle switch (5), with the keyway side down, to control panel.
30.
Using a pin removal tool, remove wire 172C from J6-18, Figure 5-7, and tie back in harness with straps contained in
kit.
31.
Using a pin removal tool, remove and discard pins from J6-16 and 24.
32.
Install three electrical leads in accordance with wiring diagram (refer to Figure 5-7). Secure leads with straps
contained in kit.
33.
Remove clamps (8), Figure 5-9, and discard hose from crankcase breather air intake tube in accordance with
TM 9-6115-644-24. Wrap rope heater (2) assembly spirally on new air breather hose (1) provided in kit approximately
five (5) revolutions, leaving approximately six (6) inches of rope heater (2) on each end of hose. Wrap rope heater (2)
and air breather hose (1) with foil tape (3) provided in kit. Install pipe insulation (4) over air breather hose (1), rope
heater (2), and foil tape (3), leaving rope heater wires exposed for electrical connection. Install assembled air breather
hose (1) between crankcase breather and air intake hose. Secure air breather hose (1) with clamps (8) removed from
above.
34.
Install Rope Heater to TB-7, HR1 inside output box and electrical leads in accordance with wiring diagram,
Figure 5-7. Secure leads (6 and 7), Figure 5-9, with straps contained in kit.
35.
Install thermostat assembly (5), Figure 5-9, to TB-7 pins 8 and 9.
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