QED AutoPump AP-3 Operation Manual page 103

AP-3 Manual
Top-Loading to a Bottom-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 51)
2. Unthread the "WYE" assembly "C" from the pump and clean the threads "D" on the
pump. A strap wrench can be used.
3. Unthread the discharge check valve "E" from the wye assembly, clean the threads on the
valve, and then wrap them with Teflon® tape.
4. Thread the discharge check valve into the coupling reducer "F", making sure the pinned
end is up, and thread the coupling on the pump discharge pipe "D". Tighten the valve
and coupling.
5. Unscrew the bottom plug "G" from the pump using a spanner wrench. If the casing
comes off with the plug, the plug may be knocked out with a wooden 2"x2" or similar
blunt tool inserted into the open end of the casing.
6. Remove the o-ring from the plug and install it on the bottom of the check valve "H".
7. Lubricate the first 3/4 in of the inside of the casing with food-grade Teflon-filled grease.
8. Spin the bottom check valve on the pump with a spanner wrench. Do not use sealant
or tape
Caution:
Turn the valve only until each end of the casing is just touching the head
and the valve, and then back it off 1/4 turn. Do not tighten the parts hard
against each other.
If the casing is off the pump, insert the bottom check valve until the o-ring is against the edge
the casing. Then hold the casing vertical and place the open end against a resilient surface,
like rubber, cardboard, or carpet. Press the valve downward into the casing. Spin the casing
on the pump with a spanner wrench, screwdriver, or with a strap wrench on the last 1-1/2-inch
of the casing.
Warning:
Keep hands away from the pinch point while pressing the plug into the
casing
Page 94
QED Environmental Systems