REMOVE AND REPLACE WEAK SPRING IN FOOT CONTROL
After troubleshooting the foot control for a sluggish response, you isolate the
malfunction to a weak spring in the foot control. You must remove and replace the
defective spring. Refer to figure 6-13, number 17.
Before removing the foot control cover, turn off the air supply and bleed all \
pressure from the system. If this is not done, the stem assembly may be
ejected from the foot control valve. Never turn on the air supply to the foot
control when the cover is off of the foot control, unless you have taken
appropriate steps to ensure that the stem assembly cannot be ejected.
a. Position the foot control so the silver top is face down.
b. Remove the four Phillips screws from the base. This releases the silver top.
c. On the bottom of the foot control, remove the two Allen screws that are in the
center of the black base.
d. Separate the top portion of the foot control from the base.
e. Remove the stem with the retaining ring by sliding the stem up.
f. Holding the stem firmly, remove the retaining ring which is holding the spring
g. Place a replacement spring over the stem and replace the retaining ring.
h. Reverse steps a. through f. above to reassemble the unit.