QED AutoPump AP-3 Operation Manual page 107

AP-3 Manual
Short bottom-loading to a short top-loading conversion:
1. Secure the pump with a spanner wrench "A" on the head or with a screwdriver "B"
through the support ring. (See Figure 53)
2. Unthread discharge check valve "C" from the pump and clean the threads in the
valve and on the pump "D". A strap or pipe wrench can be used.
3. Apply Teflon tape to the threads on the wye assembly nipple "E" and thread on
the discharge check valve. Check that the pinned end of the valve is up. Hold the
bushing at the top of the "WYE" with a wrench and then tighten the valve with a pipe
wrench or a strap wrench.
4. Apply Teflon tape to the pump threads "D". Tighten the wye assembly on the
pump by using a wrench on the bushing at the bottom of the "WYE". Align the
"WYE" so that the air ports on the pump head are even with the indentations on
each side of the "WYE".
5. Remove the casing and the intake check valve. See page 47.
6. Install the middle stop, spring cups, and spring. To remove the float drive out the
bottom spring cup pin.
7. Remove the o-ring from the check valve and install it on the bottom plug "G".
8. Lubricate the first 3/4 in. of the inside with food-grade Teflon-filled grease.
9. Insert the plug into the casing until the o-ring touches the edge. Hold the casing
vertical and place the open end against a resilient surface like rubber, cardboard, or
carpet. Press the plug downward into the casing.
Warning:
Keep hands away from the pinch point while pressing the plug into the
casing.
10. Spin the casing and plug on the pump with a spanner wrench, screwdriver or, a strap
wrench on the last 1-1/2-inch of the casing. Do not use sealant or tape.
Caution:
Turn the plug only until each end of the casing is just touching the
head and the plug, and then back it off 1/4 turn. Do not tighten the parts
hard against each other.
Page 98
QED Environmental Systems