Retract System Troubleshooting
Should there be an
internal air leak in a cylinder (air ram) it will initially show up (sound
like) a problem in the selector valve.
The problem is caused by a
defective or worn "O" ring or the air is bypassing the piston somehow.
If it is a BVM part, return it for repair or replacement.
to pinch off air lines to isolate the problem.
Connect a lengthy piece
of air tubing to the end of cylinder, submerge the end of the tube in water and
hold the ram shaft in the mid stroke position. Apply air pressure to other end
of cylinder and check for bubbles.
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