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3-24. CHECK VALVE - Continued
If 'O' rings or back-up washer are damaged, remove 'O' rings and back up washer.
Replace 'O' rings and back-up washer.
If 'O' rings are not defective and some other fault exists, replace check valve.
Screw repaired or new check valve (1) in manifold (3) and tighten.
Install solenoid coil (2) on solenoid valve.
END OF TASK