TM 9-2320-209-20-3-1 c. Repair. Repair d. Replacement. air cleaner by replacing damaged or unserviceable parts. 1. Place air cleaner head (1) against firewall (2) as shown and aline four mounting holes. 2. Put four bolts (3) with four lockwashers (4) through air cleaner head (1) and firewall (2) . GO TO FRAME 2 TA 047141 4-4