Reassembly Procedure - DECCAN DP 50/30A Installation, Operation And Maintenance Manual

I N S T A L L A T I O N , O P E R A T I O N A N D M A I N T E N A N C E M A N U A L
 Store all the parts of rotating assembly in clean and dry place and arrange to store
the parts in well-oiled condition.
This completes the dismantling of the pump.

8.2 REASSEMBLY PROCEDURE

 Check 'O' ring for cut or flaws, discard if faulty lubricate and roll 'O' ring in groove of
each shaft sleeve.
 Wipe over shaft with clean light oil.
 Keep shaft so that coupling end extension is in correct looking from position of
suction and delivery branches.
 Locate the locking shaft sleeve at NDE side with the help of impeller key and tighten
it on the shaft. Please check that the "O" ring is fitted in groove of sleeves. (For
CCW).
 Check impeller vanes for correct direction of rotation. Slide the impeller on the shaft.
check that key way provided on shaft extends equally outside the hub of the
impeller on both sides.(For CCW)
 Slide DE side adjusting sleeve in the shaft and tight it against impeller hub with the
help of set screw. .(For CCW)
 Locate the locking shaft sleeve at DE side with the help of impeller key and tighten it
on the shaft. Please check that the "O" ring is fitted in groove of sleeves. (For CW).
 Check impeller vanes for correct direction of rotation. Slide the impeller on the shaft.
check that key way provided on shaft extends equally outside the hub of the
impeller on both sides.(For CW)
 Slide NDE side adjusting sleeve in the shaft and tight it against impeller hub with the
help of set screw. .(For CW)
 Apply a hand of light oil on casing rings and place casing rings on the impeller.
 Check 'O' ring for cut or flaws, discard if faulty lubricate and roll 'O' ring in groove of
each insert..
 Slide inserts over shaft with guide vane at top position.
 Slide glands over the shaft/slide bare mechanical seal over the shaft and locate the
same on the shaft with the help of grub screws.
 Slide the liquid deflector on the shaft from DE & NDE side.
 Fit shoulder ring on to shaft, then fit oil seal into insert. Ensure that no foreign
particle should not enter in bearing assembly.
 Heat the ball bearing to approximately 100°C using heating oil bath. And do not
exceed 120°C.
 Use hand gloves while handling heated bearings. Slide the heated bearing on to the
shaft to about shoulder ring at non driving end. Place locking washer onto the shaft
& screw bearing lock nut using hook spanner. Tight the lock nut against bearing.
Bend the washer in the slot of bearing lock nut.
 Cool the bearing to room temperature and coat both sides with grease.
 Coat the inside to the bearing housing with grease and slide into place over bearing.
Secure bearing housing to insert with four hex head screws.
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