Finish Thompson PFV - Manual (Page 7)

INSTALLATION & MAINTENANCE INSTRUCTIONS
Installation
1. Remove the drum pump from its packaging and inspect for shipping damage.
2. Turn the pump coupling to verify there is no binding.
3. Verify the housing cover (item 21) is on tight (it has a left hand thread).
4. Adjust the coupling so that the empty slots in the insert are at 3 and 9 o’clock with the pump dis-
charge at 12 o’clock.
5. Install the motor onto the drum pump per the installation instructions from the Operation & Installation
Manual of the specific motor model.
Note: Pumps with the standard 1” barb spout include a variable orifice fitting, which initially limits the flow of the
pump to 10 gpm. As it is cut away, flow will increase from 10 gpm up to maximum flow (to increase flow,
simply trim back orifice). Orifice steps control flow as follows: Step 1 = 10 gpm, Step 2 = 20 gpm, Step 3 = 30
gpm, Step 4 (maximum opening) = maximum flow (see Fig. 1).
Note: ALWAYS use a 1” I.D. hose properly secured to the barb spout using a hose clamp.
Maintenance
Disassembly
1. Remove the housing cover (item 21) by turning it clockwise (left hand thread) while gripping the impeller
housing (item 18).
2. Turn the impeller until a hole in the shaft can be seen through the square slot in the impeller housing (item
18), and insert 3/32 pin into the hole. Holding the pin, turn the impeller (item 20) counterclockwise (right-
hand thread) and remove it.
3. Remove the impeller housing (item 18) by gripping the intake tube and spinning the housing clockwise
(left hand thread). Re-insert the 3/32 pin and while gripping the pump coupling unthread (counterclock-
wise) and remove the shaft (item 19) from the bearing assembly (item 3).
4. Place the pump head (item 5) in a vise (do not crush) and remove the intake tube (item 9) by unthreading
clockwise (left hand thread). Remove the inner upper (item 11) and lower (item 15) tubes from the head.
Remove the bearing assembly (item 3) and the FKM lip seal (item 4) from the head.
5. Remove the center bearing (item 13) from the upper (item 11) and lower (item 15) tubes.
Step 1
Step 2
Step 3
Step 4
Fig. 1
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