If the piston moves toward the
applied position but will not release, the valve is positioned too far out
in the piston rod. To correct the adjustment, remove the piston rod
yoke clevis pin and special bushing and loosen the valve links lock-nut.
Hold the valve rod with a pair of pliers and turn the valve links 1/2
turn to the left or counterclockwise. Fig. 36.
Reassemble the clevis pin and
bushing and repeat the test. If the 1/2 turn of the valve
links does not correct the condition, repeat the adjustment 1/2
turn at a time until the piston will move in both directions as
outlined in 3 and 4. If the piston moves toward the released position
but will not move in the applied direction, the valve is adjusted too far
into the piston rod. In this case the valve links must be turned 1/2
turn to the right or clockwise until the proper adjustment is
Best performance is secured by
turning the valve links 1/2 turn to the right or