QED AutoPump AP-2, Operation Manual

Page: 52 / 111

QED Environmental Systems
AP-2 Manual
Page 44
STEP 1 - Insert and hold a spanner wrench on the circumference of the lower head.
Rotate a spanner wrench counterclockwise on the lower head assembly.
Hold the casing with a handle or a strap wrench. (See Figure 14)
Caution:
Do not leverage any tool against the air inlet or air exhaust fittings. This
could damage the fittings.
STEP 2 - Once the lower head is unscrewed and removed from the discharge tube,
pull the lower head assembly out of the casing.
STEP 3 - If the lower head remains in the casing, turn it and remove it from the
pump casing.
Note:
The O-rings at the top and bottom of the pump may have swollen due to
solvents in the fluid being pumped and therefore make turning the lower
head difficult. Prevent the outer casing from turning while removing the
lower head.
Cleaning Pump Interior
The inner workings of the pump should now be exposed for inspection and cleaning. (See
Figure 15, Figure 16, Figure 17, Figure 18, and Figure 19)
Note:
A Scotch Brite® abrasive pad is useful for cleaning debris from the pump
components.
STEP 1 - Gently brush off built-up solids from the float, the discharge tube, the
pump casing, and the control rod guide.
STEP 2 - The pump can be steam cleaned without damage.
STEP 3 - Remove thick deposits of hardened scale on the discharge tube by using
a handbrush.