Maintenance
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INOXPA S.A.U.
· 01.400.30.09EN · (0) 2021/04
8.7. DISASSEMBLY AND ASSEMBLY OF THE PUMP
The assembly and disassembly of the pumps should be done by qualified personnel. Make sure that the
personnel read carefully this instruction manual and, in particular, those instructions which refer to the work they
will perform.
Incorrect assembly or disassembly may cause damage in the pump’s operation and lead to high
repair costs and a long period of down time.
INOXPA is not responsible for accidents or damages cause by a failure to comply with the
instructions in this manual.
Preparation
Provide for a clean working environment so some parts, including the mechanical seal, require very careful
handling and others have close tolerances.
Check that the parts which are used are not damaged during transport. When doing this, you need to inspect
the adjustment edge, the butted faces, the tight fit, burrs, etc.
After each disassembly, carefully clean the parts and check for any damage. Replace all damaged parts.
Tools
Use the proper tools for assembly and disassembly operations. Use them correctly.
Cleaning
Before disassembling the pump, clean it outside and inside.
NEVER clean the pump by hand when it is running.
8.7.1. Disassembly of the pump and single mechanical seal
1. Remove the clamping ring (15) and disassemble the
disassemble the discharge casing (01A).
2. Check the condition of the O-ring (80) on the suction
casing and replace if damaged
3. Ensure that the O-ring is placed is not twisted during
the assembly.
4. Remove the diffuser (16). May be that when the
discharge casing (01A) is extracted, the diffuser
leaves together with it.
5. Loosen the countersunk screw (50) that fixes the
impeller.
6. Remove the washer (35) and the impeller (02). If is
necessary use an extractor at impeller threaded
holes.
7. Remove the screws (50A) and remove the protector
(47A).
8. Remove the screws (52B) and the suction casing
(01).
9. Manually remove the stationary part of the seal (08)
which is located in the suction casing (01).
10. The rotating part is located free on the shaft (05).
Slide it by the shaft.
11. Check the sealing surfaces and O-rings from the
mechanical seal (08) are not damaged.
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