TM 9-4520-260-13
5-6 BLOWER/MOTOR/VENT ASSEMBLY - CONTINUED
Make sure clearance exists between back of fan combustion subassembly and blower wheel. Equipment
damage may occur.
5.
Position blower wheel (13) on motor shaft, aligning set screw (15) with flat on motor shaft, and secure.
6.
Position housing (12) over blower wheel (13).
7.
Install tape(11) (Figure 11, Appendix F).
8.
Install fan (7) to motor shaft, aligning set screw (6) with flat on motor shaft, and secure.
9.
Install four wellnuts (5) in fan mount plate (4).
10.
Align fan mount plate (4) to the motor mount (3). Secure with four screws (1) and four washers (2) to wellnuts (5) on
fan mount plate (4). Torque to 5 lb-in.
11. Position the blower/motor/vent assembly to the heat exchanger (4, figure 5-5) and secure with four screws (20).
INSTALLATION (Figure 5-5)
1. Assemble two screws (16), two lockwashers (17), two mounting pins (18), and two rubber tubes (19) to heater case
(11).
2. Position the blower/motor/vent assembly (10), gasket (15), and heat exchanger (4) to heater case (11). Align heat
exchanger exhaust tube (21) in exhaust fitting opening (22) on back of the heater case (11).
3. Align the assembled parts to the back and front of heater case (3).
4. Position front plate assembly (2) to heater case and secure with 1 screws (1). Note that four screws are installed in
the heat exchanger.
5. Tighten the clamp and sleeve (9) around the mounting pins (18).
6. Align the control panel (13) and secure with two stud-camloc fasteners (12).
7. Install two clamps (7) and connect overheat switch wires (6).
8. Connect flame switch wires (23) to ECU (8).
9. Connect motor wires (5) to ECU (8).
TEST
1. Connect the thermostat and power plugs to the control panel.
2. Start the heater (para 2-10) and check for correct heater operation.
5-18
