4-22. FIREMAN'S HEATER ASSEMBLY (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
Compressed air used for cleaning purposes will not
exceed 30 psi (207 kPa). Do not direct compressed
air against skin. Use goggles or full face shield.
Clean motor by blowing off dust and dirt with compressed air. If necessary to remove oil or grease, use a cloth
dampened with dry-cleaning solvent.
Inspect parts for cracks, breaks, and damage.
Inspect heater core for bent fins, loose tubing, leaks, and damage.
Inspect motor for damage. Check brushes for serviceability.
Repair consists of replacement of damaged parts.
Place brushes (25) in motor (14) and install caps (24).
Position heater core (22) in heater housing (23). Position inner frame (21) in housing and install six screws (19)
and flat washers (20). Install petcock (18).
Position motor (14), bracket (15), screen (16), and fan (17) as an assembly in heater housing (23) and install
three screws (12) and lockwashers (13).
Place heater assembly (9) on cab floor and connect hoses (11) and (10). Tighten hose clamps (8) and (7).
Install four screws (4), lockwashers (5), and flat washers (6).
Connect electrical leads (3) and remove tags. Use electrical tape and wrap electrical leads.
Turn output cutoff valve (2) and input cutoff valve (1) to ON.
Set battery switch to CLOSE. Set #2 heater switch to ON. Check cab heater for proper operation.