3.
When you replace the foot control signal relay valve O-rings, which of the
following procedures should you use?
a. Position the foot control so that the top is face up.
b. After separating the top of the foot control from the base, remove the stem by
sliding it down.
c.
Turn the assembly over and remove the O-ring and slide the spacer out.
d. Wash off, with a hot soapy solution, all grease that may have dripped onto the
O-rings.
4.
When you replace a master block 3-way cartridge valve stem O-ring, which of the
following procedures should you use?
a. Pull the knobs off the air and water coolant flow control and remove the
cartridge valves through the faceplate.
b. Turn the air off to the unit and bleed all air pressure left in the system.
c.
If the valve cannot be pulled out by hand, place the master block in a silicone
solution until you can pry it loose with a wrench.
d. Turn the water off at the floor utility box and bleed all water from the system.
5.
When you remove and replace a defective spring in the foot control, you should
use which of the following procedures?
a. Position the foot control so the silver top is face down.
b. On the bottom of the foot control, remove the four phillips head screws from
the center of the black base.
c.
Remove the stem with the retaining ring by forcing air pressure through the
foot control valve.
d. Lubricate the replacement spring before placing over the stem, and secure
with Locktite.
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MD0371
6-13