Horn Hoses, Lines and Fittings. CLEANING/INSPECTION 9. Clean tube assemblies (5 and 12) with mild detergent and water s o l u t i o n. Wipe dry. TOXIC/FLAMMABLE Dry cleaning solvent P-D-680 used for cleaning parts, is toxic and flammable. Use only in well ventilated areas. Wear protective goggles and gloves. Do not smoke or allow open flames or sparks in areas where cleaning solvent is used or stored. Avoid contact w i t h e y e s , s k i n o r c l o t h i n g . If contact with eyes is made, flush with cold water and seek medical attention immediately. If contact with skin or clothing is made, f l u s h w i t h c o l d w a t e r . I f y ou become dizzy while using cleaning s o l v e n t , g e t f r e s h a ir immediately. COMPRESSED AIR HAZARD Compressed air used for cleaning purposes will not exceed 30 psi. U s e o n l y w i t h e f f e c t i v e c h ip guarding and personal protective equipment (goggles/shield, g l o v e s , e t c . ) . 10. 11. 12. Go to 13-14 Clean all other parts with cleaning solvent P-D–680. Dry thoroughly with compressed air. R e f e r t o paragraph 2–8. I n s p e c t a l l p a r t s . R e f e r t o p a r a- graph 2–9. If tubes must be replaced, cut from bulk tubing NSN 4720-00-845–7189 as f o l l o w s : Tube (5) cut 24 inches long. Tube (12) cut 14 inches long. sheet 4 TROUBLESHOOTING AND MAINTENANCE. (cont) (Sheet 3 of 4)

TM 10-3930-643-20 BODY, CHASSIS AND HULL ACCESSORY ITEMS 13-4. Horn Hoses, Lines and Fittings. CLEANING/INSPECTION 9. Clean tube assemblies (5 and 12) with mild detergent and water s o l u t i o n. Wipe dry. TOXIC/FLAMMABLE Dry cleaning solvent P-D-680 used for cleaning parts, is toxic and flammable. Use only in well ventilated areas. Wear protective goggles and gloves. Do not smoke or allow open flames or sparks in areas where cleaning solvent is used or stored. Avoid contact w i t h e y e s , s k i n o r c l o t h i n g . If contact with eyes is made, flush with cold water and seek medical attention immediately. If contact with skin or clothing is made, f l u s h w i t h c o l d w a t e r . I f y ou become dizzy while using cleaning s o l v e n t , g e t f r e s h a ir immediately. COMPRESSED AIR HAZARD Compressed air used for cleaning purposes will not exceed 30 psi. U s e o n l y w i t h e f f e c t i v e c h ip guarding and personal protective equipment (goggles/shield, g l o v e s , e t c . ) . 10. 11. 12. Go to 13-14 Clean all other parts with cleaning solvent P-D–680. Dry thoroughly with compressed air. R e f e r t o paragraph 2–8. I n s p e c t a l l p a r t s . R e f e r t o p a r a- graph 2–9. If tubes must be replaced, cut from bulk tubing NSN 4720-00-845–7189 as f o l l o w s : Tube (5) cut 24 inches long. Tube (12) cut 14 inches long. sheet 4 TROUBLESHOOTING AND MAINTENANCE. (cont) (Sheet 3 of 4)