TM 5-4520-241-14
(2) Remove the ventilating motor and its mounting bracket by removing screws (1, fig. 5-13) and lock washers
(2).
(3) Remove nut (3), lock washer (4), cable clamp (5), lock washer (6), and screw (7) to unfasten one end of
grounding strap (21).
(4) Remove nuts (8), lock washers (9), and screws (10) to separate and remove the two motor mounting brackets
(11).
(5) Pull the mounting pads (12) off the motor assembly if they are damaged.
(6) Remove screw (13), lock washer (14), blower disc (15), and spacer (16) so that the fan can be removed.
(7) Loosen both set screws (18) and remove axial fan (17).
(8) Remove the one nut (19) and lock washer (20) which secure the grounding strap (21) to the ventilating motor
(22). The ventilating motor is now ready for inspection. No repair is authorized.
b. Installation. Installation of the motor is the reverse of removal. Note the following:
(1) Be sure the axial fan (17) is secure on the motor shaft. Check that both set screws (18) are firmly tightened.
(2) Check installed height of axial fan as shown in figure 5-14. Fan must be positioned as shown to ensure
maximum efficiency. Loosen nuts (8) and slide the motor up or down within brackets (11) to obtain this dimension.
(3) Check that openings for knockout plug and wire slot are sealed. If they are not, seal with General Electric
RTV-102, or equivalent, before installation.
(4) Route the orange motor wire through the grommet in the heater case shelf and connect to terminal E on the
terminal strip. Connect the white wire to the three-way electrical connector near the ignition transformer assembly.
5-14. FUEL PUMP POWER SUPPLY. Remove the two mounting screws which secure the fuel pump power supply to
the front of the heater case. Disconnect the gray, white, and yellow leads at their respective terminal connections.
5-15.
BURNER ASSEMBLY.
a. Removal.
(1) Disconnect the ignition cable. Remove the igniter (1, fig. 5-15) from the burner head.
(2) Disconnect the fuel lines and wires to the carburetor. Remove four screws (2) which fasten carburetor (3) to
the burner head.
5-25
