TM-9-2320-273-20

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE

NOVEMBER 1980

TM-9-2320-273-20 - Page 672 of 1500

TM 9-2320-273-20

ELECTRIC HORN AND CAB HEATER CONTROL.

5-69. HEATER FAN SWITCH MAINTENANCE (Continued).

LOCATION/ITEM

ACTION

REMARKS

B. INSTALLATION.

7. Four wires (3).

Install on heater fan

switch (4).

8. Heater fan switch (4).

Aline and install in

lower control panel.

9. Hex nut (5).

Install and tighten.

10. Heater knob (6).

Install.

11. Back panel cover (7).

Slide over cables and

press on back of lower

control panel.

12. Two screws (2).

Install and tighten.

13. Batteries.

Connect per paragraph

5-37B.

C. OPERATIONAL CHECK.

14. ENGINE RUN switch (1).

15. HEATER FAN switch (4).

Turn left to accessory.

Rotate heater knob (6)

through all positions (Lo,

Medium, Hi) and verify

the heater fan increases

and decreases according-

ly. Verify that fan motor

shuts off with heater knob

(6) set to OFF.

5-248