Operating instructions

TM 55-4920-394-13&P
Table 3-5. Inspection of Valves
PART INSPECT FOR
Check valves Scratches and scoring of running and seating sur-
faces of the poppets and valve bodies.
Inspect springs for pitting, cracks, broken ends,
and lack of tension.
Relief valves Scratches and scoring of running and seating sur-
faces of valve discs, poppets, stems, needle
valves and valve bodies.
Pitting, cracks, lack of tension and broken ends
on springs.
Fill valve Scratches and scoring of running and seating sur-
faces of end fitting, stem, side fitting, and knob.
Sight Tube Bleed Scratches and scoring of running and seating sur-
valve faces of knob, stem, seat, poppet, and nut.
Pitting, cracks, lack of tension and broken ends
on springs.
Cracked or chipped edges on window.
Selector Four-Way Scratches and scoring of running and seating sur-
valve faces on plug, handle, ball, valve body, and
bearing.
Flow Control valve Scratches and scoring of running and seating sur-
faces of handle, stem, retainer, spool and valve
seat.
3-9