Operation
Reassembly
Models AC+2116 and AC+2116 System
1. Screw the adjustable legs into the base. On the 2116 System, use bolts to attach the base
to the dolly.
2. Mount the six spacers and the ring adapter to the base. Place the base on the top of the
motor. Mount the motor.
3. Loosely set the four motor mounting screws. Enough movement must be allowed to allow
alignment of the motor shaft in the back plate.
4. Slide the stub shaft down and over the motor shaft.
5. Place the casing gasket on the back plate. Slide the back plate over the stub shaft.
6. Place the impeller on the shaft. There should be approximately 1/16” clearance between
the back plate and impeller. The caps crews on the shaft collar may now be tightened
securely.
7. Remove the impeller and check the position of the stub shaft. If the stub shaft is not
centered in the back plate, move the motor until the stub shaft is centered. Securely
tighten the motor mount screws.
8. Install the balanced seal. Sealing of the process fluid along the shaft is accomplished by
action of the process pressure on an o-ring seal installed in a groove in the carbon seal.
The same action pressurizes the o-ring groove and augments the spring tension in keeping
a tight joint at the sealing faces. The width of the seal face controls the balancing of the
seal. This type of seal should be replaced when the clearance between the carbon seal
face and the back plate is less then 1/32: (0.79mm) or when leakage is noted. **See
instructions for setting the drive collar and seal replacement on page 13**
9. Again place the impeller back gasket and impeller on the stub shaft. Place the impeller nut
gasket on the impeller nut. Secure the impeller by tightening the impeller nut.
10. Place the screen to the notch on the inside of the casing. Check to see the screen fits
snugly and does not spin.
11. Set the casing on the back plate and clamp together with the large casing clamp.
12. Install the seal guard.
13. Install the inlet tube assembly with gaskets and clamps. Tighten clamps. Note: there is a
top and bottom to the inlet tube assembly. Place the assembly to be opposite the casing
outlet tube.
14. Install the diffuser and suction tube with the gaskets and clamps. Tighten securely.
15. Mount the control valve with gaskets and clamps. Tighten.
16. Mount the hopper to the top of the valve with gaskets and clamps. Tighten.
17. Connect supply and discharge piping.
Ampco Pumps Company
Page 10
Ampco Pumps Company AC+ Dry Blender Manual M-028 Rev C 12.20
