Zenit Group | 22 Apr 2021
GREY - DRG Assembly
GREY - DRG Assembly
- Position the motor housing horizontally on the bench and secure it with wooden wedges.
- Insert the probe cable into the housing seat.
- Insert the grommet into the probe and lock it by tightening the cable gland.
- Warning: The probe must protrude from the cable gland by approx. 10 mm
- Temporarily fix the probe cable onto the outside of the housing with adhesive tape.
- Position the stator on the housing so that one of the grooves is at the probe cable.
- Position the block on the stator, orienting it appropriately to allow the probe cable to pass through.
- Using a press, insert the stator into the housing.
- Remove the block and adhesive tape.
- Flip the housing.
- Insert the bearing retaining washer into the bearing seat.
- Place the bearing in the seat.
- Place the bearing retaining block on the housing and flip it over.
- Position the shaft inside the motor.
- Place the upper bearing and its block on the shaft.
- Using a press, insert the bearings into the shaft.
- Remove the block and place the motor on the bench.
- Lock the shaft with the circlip.
- Insert the O-ring into the aluminium flange seat and apply grease to it.
- Insert the flange into the housing and position it with the block.
- Lock the flange with the circlip making sure it is perfectly seated.
- Moisten the counterface of the mechanical seal with alcohol and place it in the seat using the block.
- Clean the seal thoroughly with a paper towel.
- Lightly lubricate the counterface.
- Insert the first seal into the shaft and position it with the block.
- Lock the seal with the circlip.
- Make sure that the shaft can rotate freely.
- Soak the second seal in alcohol and insert it into the shaft.
- Moisten the second counterface with alcohol and insert it into the pump plate housing with the block.
- Insert the locking ring into the seat.
- Lock the washer with the circlip making sure it is perfectly seated.
- Clean the surface of the seal face with a paper cloth.
- Place the O-ring in the seat and apply grease.
- Place the paper gasket.
- Lightly lubricate the seal.
- Place the pump plate on the motor housing and secure it with the screws by tightening them in a criss-cross pattern.
- Make sure the shaft can rotate correctly.
- Connect the compressed air system to the casing using a connector.
- Pour a little alcohol to make sure there are no leaks from the lower seal.
- Perform the leak test at a maximum pressure of 1 bar.
- The absence of air bubbles guarantees the perfect installation of the seal.
- Remove the connector.
- Lay the motor on the bench and fill the chamber with oil.
- Check the correct quantity in the documentation.
- Close the oil chamber with the cap. Use Loctite 243 thread lock or equivalent.
- Protect the heat protection and probe cables with a sheath.
- Insert the O-ring into the upper bearing support seat and apply grease.
- Place the upper bearing support on the motor housing. Use the hole in the holder for routing the cables.
- Attach the handle to the motor cover.
- Insert the cable gland grommet into the motor cover seat.
- Place the cable gland on the motor cover and lead in the screws without tightening them.
- Insert the cable into the cable gland.
- Insert the cable clamp and lock it in place.
- Insert the O-ring into the motor cover seat.
- Connect the motor terminals according to the diagram in the documentation and secure them with cable lugs.
- Tighten one cable lug to the earth conductor and secure it to the corresponding upper bearing support arrangement.
- Connect the motor terminals to the electrical cable and tighten the cable lugs.
- Place the motor cover on the housing taking care not to crush the conductors and secure it with screws.
- Gently pull the cable until it stops and tighten the locking screws on the cable gland.
- Connect the compressed air system to the motor cover using a connector.
- Perform the leak test at a maximum pressure of 1 bar.
- Disconnect the compressed air hose and remove the connector.
- Close the motor cover with the cap. Use Loctite 243 thread lock or equivalent.
- Flip the pump and place the impeller on the shaft.
- Secure the impeller with the locking screw. Use Loctite 270 thread lock or equivalent.
- Position the pump body and secure it with screws
- With the gauge, measure the maximum height of the blade from the pump body.
- With the gauge, measure the internal height of the intake flange.
- Shim as necessary with paper gaskets to obtain a distance of 0.2-0.5 mm.
- If necessary, use a little grease to hold the seals in place.
- Position the suction flange and fix it to the pump body with the screws.
- Check that the impeller rotates freely.
- Check with the feeler gauge that the distance between impeller and pump body is 0.2-0.5 mm.