Also, keep all the overhauled parts in order of overhaul so as to smooth the reassembling work without any error.
(1) Remove any small pipings if any.
(2) Remove the coupling guard.
(3) Remove the coupling bolts and then remove the prime mover from the common baseplate.
(4) Pull out the pump side coupling half from the pump shaft.
(5) Chock up the stage casings before proceeding with dismantling to prevent them from falling down when
the bearing housing is removed. (Refer to Fig. 5)
(6) Begin the overhauling from the discharge side.
(7) Remove the end cover and then take off the circlip and the spacer ring.
( Wedge or Frame )
Diffuser in 1st
Stage Casing
Chock
Axial
alignment
Impeller 1st
(8) After unscrewing off the bolts fixing the discharge side bearing housing to the baseplate and the casing
nuts from the casing, pull out the bearing housing together with the ball bearing from the pump shaft.
(9) Dismantle the spacer ring, circlip, delivery side shaft protecting sleeve and gland in sequence.
(10) Unscrew off each tie bolt nut from the discharge side, and dismantle the discharge casing and the last
stage impeller.
(11) Dismantle the stage casings and impellers in sequence of every stage.
(12) Dismantle the suction casing and the gland.
(13) Draw out the pump shaft from the bearing housing.
(14) When the ball bearing is replaced, take it out from the bearing housing using a pipe or the like.
(15) Inspect each part carefully and repair or replace it when deemed as necessary.
(16) When the part is hard to be removed after long term operation of the pump, apply the penetrant to the
part or use a special jig for removal. In any case, do not hit it.
3. 3. Reassembling
Reassembled the overhauled components and parts in the reverse sequence of the overhauling with reference to
“ Exploded View “. For normal running of the pump, specially follow the precautions given below.
(1) Clean adequately each pump component/parts. Prevent adhesion of dust on the connections and joint
portions.
(2) When replacing the ball bearings, use the designated bearing No. without fail (See 3.4).
