Finish Thompson EFV - Manual (Page 7)

DISASSEMBLY & REASSEMBLY INSTRUCTIONS
Disassembly
1. Prior to disassembly - remove the motor and discharge tubing.
2. Diffuser Removal - For EFP & EFV Models – When looking at the bottom of the
pump, loosen the diffuser (item 17) by turning it clockwise (left-hand thread) 2-3 turns
or until it touches the impeller (item 18). See figure 1.
3. Impeller Removal - Using a flat-head screwdriver, unthread the impeller (item 18)
by turning it counter clockwise (right-hand thread). Hold the coupling insert and
coupling (items 1 & 2) in one hand, and unthread with the other. Note: If the shaft
unthreads from the coupling, use a pliers to hold the top of the shaft. Care should be
taken to not damage the shaft threads. For longer 40” and 48” pump lengths, two
people may be required to hold the shaft and unthread the impeller. See figure 2.
Figure 1
4. Unthread the impeller roughly 10 turns or until loose.
5. Now finish unthreading the diffuser. If the impeller is loose, it will come off with the diffuser.
6. To remove the impeller from the diffuser, shake it until it engages the impeller guard inside the diffuser, and turn it
counter clockwise with a flat head screwdriver or your fingers.
7. Diffuser Removal - For EFS Models - Unthread the diffuser cover (item 19). Turn it clockwise (left-hand thread).
Unthread the impeller (item 18) turning it counter clockwise (right hand thread) using a flat-head screwdriver or hand
while holding the coupling insert and coupling (items 1 & 2) with the other hand. Note: If the shaft unthreads from the
coupling, use a pliers to hold the top of the shaft. Care should be taken to not damage the shaft threads. For longer
40” and 48” pump lengths, two people may be required to hold the shaft and unthread the impeller. Unthread the dif-
fuser (item 17) turning it clockwise (left-hand thread).
8. Shaft Removal - for all models - To remove the shaft (item 4), tap the bottom of the shaft on a piece of wood or plas-
tic and push the shaft up and out of the head (item 6). Grab the half coupling or bearing and pull the shaft assembly
straight out of the head. Note: Take care to not bend the shaft.
Important - The shaft should only be removed if the
bearing is frozen and needs to be replaced.
9. Outer Tube Removal - For EFP & EFV Models - Remove the outer tube (item 16). Hold the head (item 6) in one hand
and with the other hand, turn the outer tube clockwise (left-hand thread). When completely unthreaded, pull the outer
tube away from the head exposing the inner tube and center support (items 13 & 14).
10. Inner Tube & Center Support Removal - To remove the inner tube and center sup-
port, turn the inner tube to unseat the o-rings (item 12) and then pull the inner tube
away from the head.
11. Shaft Sleeve Removal - The shaft sleeve (item 15) will drop out of the inner tube by
holding it in a vertical position and turning.
12. Center Support Removal - 40” and 48” lengths only - If the center support (item 14)
needs to be replaced, it can be removed by spreading open the fingers and disengag-
ing it from the inner tube. See figure 3.
Figure 2
Figure 3
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