Finish Thompson AC8/8H - Manual (Page 9)

Reassembly
1. Lubricate the rubber portion of the new stationary seal (item 5) with P-80 (or equivalent) or use soapy water. Do not use
petroleum products to lubricate the rubber.
Note: Keep the polished surface of the seal face clean. Use a piece of cardboard to protect the seal while pressing against the stationary face.
2. Press the stationary seal into the seal seat of the back head assembly so that the seal surface points away from the motor face.
Place the back head into the motor adapter.
3. Place the spring retainer and seal spring onto the impeller sleeve.
4. Lubricate the inside diameter of the rotating seal component with P-80 (or equivalent) or soapy water and press it over the
impeller sleeve (item 4) with the rotating face pointed away from the impeller as shown in
Figure 2 (towards the stationary face).
5. Insert key into the motor keyway. Visually determine key location in impeller sleeve. Align keyway slots on motor shaft and
impeller sleeve. Slide impeller assembly over the motor shaft. Lubricate o-ring of new self-sealing bolt (item 6) with suitable,
compatible lubricant. Insert self-sealing bolt into the eye of the impeller using a deep well socket. Insert a screwdriver into the
motor fan to prevent motor shaft from rotating. Tighten the bolt to 12-ft lbs.
6. Place impeller housing (item 1) over back head (item 7) and o-ring (item 3) and make sure discharge is in the correct orientation
(usually 12 o’clock).
7. For AC6 pumps - Place the v-clamp (item 2) over the impeller housing, back head, and the
mounting plate (item 14). Make sure the discharge is level and in the correct
orientation.
(See Figure 3). Tighten the nut on the v-clamp. Firmly tap
the v-clamp with a mallet in several spots, and then retighten the nut.
For AC8 pumps - Insert the mounting bolts with flat washer (items 15 &16) through the
impeller housing (item 1), the back head (item 7), and the mounting plate
(item 14), and tighten with the correct hardware (items 15, 17, & 18).
8. Rotate the motor fan by hand and check for impeller rubbing. If the impeller rubs, verify that the self-sealing bolt is properly
installed.
9. Reinstall the pump into the system.
Fig 3
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