4-23. ENGINEER'S HEATER ASSEMBLY (cont)
Install two brushes (25) in motor (22) and install caps (24).
Install fan (23) on motor (22) and tighten setscrew. Position motor and fan in heater frame and install four
capscrews (21), flat washers (20), lockwashers (19), and nuts (18). Connect motor wires to connecting block and
Place manifold gasket (17) on input manifold. While feeding input wires through heater bracket, position heater
(16) on cab wall and on input manifold. Ensure gasket does not slip out of place. Install four screws (10),
lockwashers (11), and nuts (12). Install four flat washers (15), lockwashers (14), and nuts (13).
Connect conduit nut on input conduit. Connect input wires to electrical block and remove tags.
Position lower grille (9) on heater frame and install eight screws (6), lockwashers (8), and flat washers (7).
Turn input cutoff valve (4) and output cutoff valve (5) to open.
Set battery switch to CLOSE. Set #1 heater switch to ON. Check for leakage and proper operation.
Position cover (3) on heater frame and install two screws (1) and lockwashers (2).