TM 9-2320-361-20 14-28. PRIMARY HEATER FUEL LINES REPLACEMENT (Contd) g. Fuel Heater-To-Adapter Tube Removal 1. Remove tube (9) from elbows (11) and (13). 2. Remove elbow (11) from adapter (10) and elbow (13) from nipple (12). h. Fuel Heater-To-Adapter Tube Installation 1. Install elbow (11) on adapter (10) and elbow (13) on nipple (12). 2. Install tube (9) on elbows (11) and (13). FOLLOW-ON TASK: Install pump cover (para. 14-26). 14-43