TM 10-3930-669-20 16-13.  CAB HEATER HOSE 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 Adhesive (Item 1, Appendix C) Cable Ties (Item 4, Appendix C) Cap and Plug Set (Item 5, Appendix B) Solvent, Drycleaning (Item 20, Appendix C) Tags, Identification (Item 21, 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) Cab door open (TM 10-3930-669-10) Cab engine access panel open (TM 10-3930-669-10) Seat fully forward position (TM 10-3930-669-10) a.  Removal. NOTE · Tag and mark hoses prior to removal. · Cap and plug all hoses and fittings after removal. (1) Loosen two fittings (1) and remove two hoses (2 and 3) from fittings (4 and 5). 16-42