TM 10-3930-669-20 15-3.  CAB DOOR REPLACEMENT. This task covers: a.  Removal b.  Installation INITIAL SETUP Tools and Special Tools Equipment Condition Tool Kit, General Mechanic's: Automotive Engine OFF (TM 10-3930-669-10) (Item 1, Appendix B) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) Personnel Required Two Materials/Parts Washer, Lock a.  Removal. (1) Open cab door (1). WARNING Cab  door  weighs  85  lbs  (39  kg).    Use  the  aid  of  an  assistant  for  removal  to  prevent  possible  injury  to personnel. NOTE Cab door must be fully opened prior to removal from door hinges in order to clear the cab lifting point. (2) With the aid of an assistant, remove door (1) from door hinges (2) by lifting door upward. 15-22