TM 10-3930-659-20 14-14.    CAB RECIRCULATING FILTER REPLACEMENT (Con't). b. CLEANING AND INSPECTION 1. Clean foam filter with detergent and water. 2. Inspect foam filter for damage.  Replace if damaged. c. INSTALLATION 1. If removed, install two clips (4) on cab rear panel (5). 2. If removed, install two screws (1) and washers (6) on cover (2). 3. Position foam filter (3) and cover (2) on cab rear panel (5) and tighten two screws (1). TA706820 14-34