TM 10-3930-659-20 5-21. ENGINE STARTING AID LINE REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Tools/Test Equipment: •    Battery disconnect switch in OFF position (see • General mechanic's tool kit (Item 44, Appendix F) TM 10-3930-659-10). •    Left engine upper sideshield opened (see TM 10- References: 3930-659-10). • TM 10-3930-659-10 •    Left engine lower sideshield removed (see para- graph 14-16). General Safety Instructions: •    DO NOT perform this procedure near fire, flames, or sparks.  Use only in a well-ventilated area. WARNING Starting  fluid  is  toxic  and  highly  flammable.   Container  Is  pressurized  to  act  as  an expellent.  DO NOT heat container and DO NOT discharge starting fluid In confined areas or near an open flame.  Failure to follow this procedure may result in serious Injury to personnel. a. REMOVAL 1. Remove engine starting aid line (6) from two elbows (5 and 7). 2. If damaged, remove elbow (7) from engine starting aid valve (8). 3. If either nozzle (3 or 4) is damaged, remove elbow (5), nozzles (3 and 4), and reducer (2) from air Intake tube (1). 5-60