Operation
Reassembly
Models AC+3218 and AC+4329
1. Place the o-ring into the deflector collar.
2. From the bottom, slide one bearing onto the shaft until it rests against the shoulder. The
AC+4329 model requires two bearings at the shoulder of the shaft.
3. Place the shaft in the bearing housing.
4. The other bearing should be installed on the shaft through the bottom of the bearing
housing.
5. Place the retaining ring on the bottom of the shaft.
6. The bearing housing should then be installed by placing it on top of the base and tightening
the bolts.
7. Place the deflector at the top of the bearing housing.
8. The retainer ring and spacers are set by first screwing the six spacers into the ring then
bolting the spacers onto the base plate.
9. If your blender has the DG seal, install the seal gland ring with gaskets and attach to the
back plate before installing the back plate.
10. Slide the back plate over the shaft, being careful to not damage the sealing surface. Place
the back plate onto the retainer ring.
11. Center the shaft by tightening the spacer bolts in a cross pattern. Once the shaft is
centered, remove the back plate.
12. To install the motor, the blender must be tipped back on its side. Tighten the motors bolts
so they touch the bottom of the base and can be used to adjust the tension on the belts.
13. To install the pulley system, start with the blender pulley, installing the pulley key, pulley,
and bushing. Tighten the bolts.
14. Next install the motor end of the pulley system. Install the motor pulley key, the pulley,
and the bushing. Tighten the bolts. Both pulleys should be aligned horizontally.
15. Use the mounting bolts to draw the motor pulley tight. Tighten the bolts a small amount at
a time, alternating between the three, until all are tight.
16. Now you need to install the drive belts onto both the motor and the blender pulley. You
may need to move the motor to do this. The plate that holds the motor to the top of the
base has slots with bolts that can be loosened to allow for this movement.
17. Once the drive belts are on the pulleys, move the motor back and away from the blender
until there is a deflection of 5/16” (7.9mm) when applying 5 to 7 pounds of force to the belt.
18. Secure the motor and set the blender back on all four legs.
19. Install the seal. See the instructions for setting the drive collar and seal replacement.
20. Place the casing gasket on the back plate and install the back plate on the shaft.
21. Install the impeller by tightening it down with the impeller nut, making sure the impeller nut
gasket is included.
22. Place the screen to the notch on the inside of the casing. Check to see the screen fits
snugly and does not spin.
23. Firmly place the casing on the back plate and use the casing clamp to secure.
24. Install the seal guard below the casing.
25. Place the inlet adapter above the casing. Secure the adapter to the casing with the clamp
and gasket.
26. Add the diffuser and suction tube assembly to the top of the inlet adapter. Secure with the
clamp and gasket.
27. Install the butterfly valve if supplied with the blender.
28. Install the hopper to the top of the butterfly valve and secure it with a gasket and clamp.
Ampco Pumps Company
Page 11
Ampco Pumps Company AC+ Dry Blender Manual M-028 Rev C 12.20
