CAL Optional Design
- 12-
4.2. Disassembling
Follow the sequence below in disassembling
(1) Remove the coupling guard. When the flanged flexible
shaft joint is used, remove the coupling bolt.
(2) Remove the motor, and relocate it.
(3) Open the drain plug or drain valve located on the bottom of
volute casing (1020) to drain the pumped liquid out of the
casing, so that inside of the volute casing is open to the
atmosphere. For prevention of danger, be sure to check that
the liquid in the volute casing is completely cooled down,
prior to draining.
(4) Disconnect the small pipes from the pump.
(5) Remove the bolts (9010.C) for mounting the volute casing
and the casing cover (1610), nut (9200) for the stud bolt
(9020), and the bolts for fastening the support foot (1830)
to the bed.
(6) Remove bearing housing (3300) and casing cover together
with the rotor from volute casing by jack bolt (9010.B).
(7) For the oil lubricated type, remove the oil drain plug to
drain lubricating oil from the bearing housing.
(8) Unscrew the Hard Lock Nut® (9233) and remove the
impeller (2300), washer (5500) and the key (9400.2). As for
the Hard Lock Nut®, first unscrew upper nut (concave
type), and after removed it unscrew bottom nut (convex
type). Do not screw upper and bottom nut simultaneously.
(9) Disassembling the shaft seal.
For the mechanical seal type, refer to Section 5 (P.13).
For the gland type, remove the gland (4520) and remove
the lantern ring (4580) and the gland packing (4610).
(10) Separate the casing cover (1610) from the bearing housing
(3300). (It is convenient for reassembling to put a match
mark on both of the casing cover and the bearing housing.)
(11) For the grease lubricated type, remove the labyrinth (4230)
from the shaft. For the oil lubricated type, remove the drip
(5070) from the shaft.
(12) Unscrew the set bolt of the coupling and separate the pump
side coupling from the shaft with the coupling remover.
Check for wear and other damage of the element. If an
abnormal condition is found, replace the element with a
new one.
(13) Remove the both bearing covers (3600) from the bearing
housing.
(14) Slowly pull the shaft out of bearing housing, with the ball
bearings (3210) left in the bearing housing.
(15) When replacements of the ball bearings are required,
remove the rubber seal and heat up the ball bearings only
by acetylene gas, etc. And remove them from the shaft.
Caution: Do not heat the shaft.
(16) In principle, replace the flat gasket (4000) and O-ring
(4120) used for each seal surface with new ones when
disassembling the pump.
4.3. Reassembling
In reassembling, follow the reverse sequence of the disassembly,
with careful attention to the items given below.
(1) Wash each component / parts. Particularly do not permit
dust, etc. to adhere to the joint and contact portions.
(2) When ball bearings (3210) of the grease lubrication type
are used, press-fit the bearings on the shaft (2100). For the
oil lubricated type, heat up the ball bearings with oil at 110
to 120°C, and shrink-fit them on the shaft.
In this case, insert the bearings securely until they touch the
stepped parts of the shaft.
(3) Use caution not to damage the sealing surfaces and contact
surfaces of the flat gasket (4000), and other parts.
(4) As for the Hard Lock Nut® (9233), first fasten bottom nut
(convex type) fully, and then fasten upper nut (concave
type).
(5) After completion of the reassembling work, recheck the
direct-coupled condition pursuant to Subsection 1.2 (P.5)
and start the pump pursuant to Subsection 2.1 (P.6). When a
mechanical seal is used, slight leakage from the shaft seal
part may occur at the beginning of operation. However, the
leakage will be gradually eliminated. If leakage occurs even
after a considerable term of running, again disassemble the
pump for inspection.
4.4. Spare parts
4.4.1. Ordering spare parts
Send the following information, without fail, when ordering spare
parts.
• Pump size and pump type code
• Production No.
• Year of production
These are stamped on the nameplate affixed to the bearing housing
(3300).
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