How to remove the stator from the rotor on a progressive cavity pump.

Dismantling pipe-connection – stator – pump body

Make sure the equipment is disconnected from power and hydraulic connections.

a) Unscrew the two nuts and washers (20 e 21 fig. 2-9) that fasten the pipe-connection.

b) Remove the pipe-connection (4 fig. 2-9).

c) Unscrew the two tie-rods and remove them (19 fig. 2-9).

d) Extract the stator (3 fig. 2-9), twisting it in the opposite direction of that of the working pump keeping the drive shaft still with a 41 mm forked spanner.

Use a band wrench if the stator is tuck on to the rotor. 

e) Remove the dowel screw with the cylindrical head extremity (series E150 ÷ 210) with conical extremity (series E 50 ÷ 100) from the drive shaft (15 fig. 3-9). Fig. 2-9

Use mineral oil to lubricate the stator on the rotor.

See attached manual for more information. See page 31 for this section.

Fig 2-9 Bellin PCPump Manual

band wrench

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