Finish Thompson EFV - Manual (Page 8)

13. Inner Tube & Shaft Sleeve Removal - The outer tube and head for EFS models are
welded together. To remove the inner tube and shaft sleeve (items 13 & 15 indicated
on the Exploded View on pg. 8-9), hold the outer tube and head assembly in a verti-
cal position, and the shaft sleeve will fall out. To remove the inner tube, “pretend” to
hit the bottom of the pump on the floor but stop before it actually hits. This motion
will allow the weight of the inner tube to release the o-rings, and it will drop out of
the bottom of the pump. It is recommended to do this over a soft surface to prevent
damaging the inner tube as it drops out of the pump.
14. Seal Removal - To remove the seal (item 5) from the head (item 6 or item 16 for EFS),
use a hook tool, available at most hardware stores, to pull the seal out from the top of
the head. Take care not to damage the seal seat area. See figure 4. Note: The seal
should be replaced if worn or the bearing is failing or frozen.
Figure 4
Reassembly
1. Seal Installation for EFP & EFV models - Take the head (item 6), and for EFS models take the outer tube with head
(item 16), and install a new seal (item 5). Insert the open part of the seal into the lower bore of the head. See figure 5.
Use a 3/8” (9.5 mm) dowel to press and seat the seal into place. Seal sits slightly below the surface. See figure 6.
Figure 6 Figure 5
2. Reinstall the half coupling, bearing and shaft (items 2, 3 & 4 indicated on the Exploded View on pg. 8-9) as an
assembly into the head. If the bearing needs to be replaced it is recommended to purchase a new shaft, bearing and
half coupling assembly because the EF Series shaft can be damaged when removing or installing the bearing.
3. Shaft Installation - Slide the shaft down through the seal until the bearing
engages the bearing bore in the head. Use any size dowel under 1”(25.4 mm) in
diameter and press the half coupling, bearing and shaft into place using an arbor
press or by lightly tapping with a soft mallet. Note: Do not use excessive force.
Unthread the half coupling counter clockwise (right hand thread) to verify that the
bearing is seated properly. See figure 7. Reinstall the half coupling.
4. Inner Tube, Center Support & Shaft Sleeve Installation - for all models -
Reinstall the inner tube, center support (if used) and shaft sleeve (items 13, 14 &
15). Slide the shaft sleeve onto the shaft. The shaft sleeve is self-positioning so
slide it up as far as it will go on the shaft. Reinstall the inner tube with center support (if used) over the shaft and
shaft sleeve. The double o-ring side seats up into the head with a slight twisting motion. Make sure the inner tube
is seated properly. The bottom of the inner tube will be flush with the bottom of the outer tube when properly seated.
Figure 7
6