Remove four nuts (121), lockwashers (122), and loop clamps (123) from weld studs. Discard lockwashers.
Remove two nuts (124), lockwashers (125), and loop clamps (126) from weld studs. Discard lockwashers.
Inspect nonmetallic hoses removed for kinks, splits, deterioration, chaffing, cuts, and loose fittings.
nonmetallic hoses are defective, repair hoses and replace fittings as required.
Inspect air pressure relay valves, air pressure relay (multifunction) valves, drain cocks, and air brake valves for air
leaks, broken housings, cracked or stripped threads, and corrosion. If corroded, clean as required. If defective,
replace as required.
Obtain new fittings and bulk nonmetallic hose.
Refer to appendix F and cut new nonmetallic hose (1) to specified length.
Install fitting nut (2), small opening first, onto nonmetallic hose (1). Install sleeve fitting (3) onto end of nonmetallic
Push adapter fitting (4) over sleeve fitting (3) and nonmetallic hose (1) as far as possible by hand and tighten
fitting nut (2) to adapter fitting (4).
4-226 Change 1