TM 10-3930-669-20 7-11.  AIR RESTRICTION INDICATOR GAUGE REPLACEMENT. This task covers: a.  Removal b.  Installation INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Materials/Parts Cable Ties (Item 4, Appendix C) Equipment Condition Engine OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) Batteries disconnected (Para 7-48) Cab door opened (TM 10-3930-669-10 a.  Removal NOTE Cut cable ties as required. (1) Remove  four  screws  (1)  from  instrument panel (2). (2) Remove  screw  (3)  and  washer  (4),  and raise    instrument    panel    (2)    from    dash frame (5). (3) Remove hose (6) from gauge (7). 7-25