Iron Build-Up Cleaning Procedure - QED AutoPump AP-2 Operation Manual

AP-2 Manual

Iron Build-up Cleaning Procedure

After the casing has been removed from the AutoPump please follow the procedure
below:
Note:
The procedure described below can be seen in the Maintenance Video
Tape. This will aid the technicians understanding and ease of properly
disassembling the AutoPump, effectively cleaning components and then
re-assembling the AutoPump.
STEP 1 - The bottom intake check valve assembly should be removed from the
casing. (See pages 44 and 45, and Figure 14 on page 46)
STEP 2 - Visually inspect both stainless steel fluid discharge pipe for iron build-up
or debris. Also, do the same with the float that rides up and down on
the SS discharge pipe.
STEP 3 - Should there be iron deposits on either or both the discharge pipe or float,
then remove the float from the SS fluid discharge pipe as follows:
STEP 4 - The stainless steel fluid discharge pipe can now be cleaned using either a
Scotch Brite pad, a wire brush or finally a wire wheel on either a drill or
a grinding machine. After removing the iron debris, it is recommended
the pipe be water rinsed.
STEP 5 - Both the internal and external surfaces of the float will generally require
cleaning. The material choices include a Scotch Brite pad, and a light
grade 150 sandpaper and a razor or Exacto Knife. The internal surface of
the float can be cleaned by attaching some Scotch Brite to the end of a
long pipe or screw driver to scrape the inside hole of the float.
Note:
This float should not be soaked in any acids.
Revision 7 - August, 2007
- Remove the control rod guide. (See Figures 15 through 18)
- Remove the small SS nut from the bottom spring cup (See Figures
15 through 18) The nut and cup removal will allow you to remove
the spring and float from the SS discharge pipe.
Chapter 6: Maintenance
Page 51