Finish Thompson BTS - Manual (Page 8)

6
Reassembly
1. Insert the shaft assembly up through the bottom of the intake tube (item 7) until the end of the shaft sticks
out above the top of the pump head.
2. Warm up the seal assembly (item 4) prior to installation by using a heat lamp or soaking them in hot water.
This will aid in the ease of proper seal installation. Make sure there are no metal burrs on the pump shaft in
the bearing hole location or the coupling half setscrew location that could “cut” the seal during installation.
3. Lubricate the end of the shaft with Vaseline to aid in the seal installation. Carefully install the seal down
over the shaft with the two “slots” facing up toward the bearing assembly. The raised lip in the center of the
seal (that faces the bottom of the pump) must go on straight and not buckle on one side.
4. After the seal is on the shaft correctly, install the bearing assembly (item 3) onto the shaft. Use the bearing
assembly to push the seal further down the shaft until the hole in the center of the bearing assembly matches
up to the hole in the shaft. Install the roll pin through the bearing assembly and shaft.
5. Carefully press on the shaft end to slide the bearing assembly into the pump head. Use a block of wood and
a mallet if needed to drive the assembly into the pump head. Be careful not to mushroom the shaft head or
the coupling half will not go on.
6. Install the coupling half (item 2) on the end of the shaft and tighten the setscrew into the dimple on the shaft.
Make sure the setscrew bottoms out in the dimple.
7. Reinstall the bottom bearing (item 12), and tighten the setscrew that holds it in place.
8. Turn the pump coupling to insure there is no binding.
Note: Repair instructions can be downloaded from our web site at www.finishthompson.com or contact Technical Service at
1-800-888-3743.