FRISTAM Shear Pump FSPE 3522

The shaft seal must be replaced if

– Pumping medium or sealing or quenching liquid flows out of the pump on the atmosphere side

– Sealing liquid leaks into the pumping medium

1. Dismantle the pump head. See Chapter 9.8, "Pump Head Removal" page 17

2. Replace the mechanical seal and mount the pump head. See Chapter 9.10, "Pump Head Attachment" page 19. Perform the following tasks according to the given shaft seal

– Preassemble the seals on the shaft

– Mount the pump casing on the lantern

Motor reached normal operating temperature

Motor turned off and secured from accidental turn on

Oil collection container placed under the oil drain plug

Caution! Danger of burning from hot oil. Wear suitable protective gloves.

Oil drain plug loosened and removed

Oil completely drained and disposed of in accordance with local regulations

Oil drain plug and seal cleaned and remounted

Amount of oil used (refer to Table 4 'Oil volumes')

Pump casing is connected firmly to the lantern

The impeller has been mounted and the impeller nut tightened

Measure the clearance Z between the pump casing (47) and the impeller (46) using vernier calipers

Compare the clearance Z with Table 7 'Clearances' page 19

Pipe on discharge line fitting has been detached

Pump casing is connected firmly to the lantern

Turn off the motor and prevent it from being able to be turned on accidentally

Take the lantern off of the motor

Only for flange connection: Check the clearance if necessary

Replace the mechanical seal and mount the pump head

Warning: This procedure requires trained personnel with PPE!

Bearing cap removed on the pump side

Bearing cap removed on the motor side

Shaft forced out in the direction of the pump head

Note: All parts that are gray in the above two figures remain on the shaft

Surfaces of all parts cleaned and checked for damage

Select the type of lubricant used

Pump shaft with the bearing pressed into the bearing block