Instruction manual

4.2.3 Dismantling and reassembly
4.2.3.1 Magnetic drive pumps
General precautions prior to dismantling
- always drain liquid from pump.
- disconnect all necessary electric cables or use switch on pump.
- disconnect suction and discharge piping (watch spilling liquid).
- do work on a clean bench.
When ordering Hendor parts always quote Pump Type and Serial Number.
Dismantling
- remove bolts from pump casing.
- take out impeller and impeller shell; mind strong magnetic force.
Replacing worn or damaged wet end parts
Series M10..M15
- rear static bearing is easy to replace.
- take ceramic shaft out of casing and replace it.
- rotating bushing is molded into impeller; replacing only possible by exchanging complete impeller.
Series MX60..MX120 and M110..M400
- static bearings cannot be replaced (heat shrinked); when damaged replace complete part.
- rotating bearings are mounted by thread; front right-handed thread ; rear left-handed thread.
General description of dismounting a drive magnet
- loosen hex. screws through hole in bracket.
- by means of a lever drive magnet down the shaft; mind strong magnetic force.
- check for remaining metal particles on the magnet and remove them.
General description of mounting a drive magnet
- slightly grease shaft of motor.
- replace drive magnet on shaft by hand watching position of key.
- ensure that drive magnet goes up to shaft end (when using a hammer, be sure motor bearings are not damaged).
- secure hex. screws.
Assembly
- mount impeller shell.
- put impeller into shell; mind strong magnetic force.
- place O-ring and put pump casing into place.
- mount bolts and tighten them crosswise.
After assembly always check for free rotation by hand. Verify direction of rotation indicated by arrow on pump/motor prior to
regular operation.
4.2.3.2 Mechanical seal pumps S55 .. S300-PP
General precautions prior to dismantling
- always drain liquid from pump.
- disconnect electric cables or use switch on pump.
- disconnect suction and discharge piping.
- do work on a clean bench.
When ordering Hendor parts always quote pump type and serial number.
Dismantling
- remove bolts from pump casing.
- take off SS plate and pump casing.
- turn safety guard so that hex. screw on coupling is accessible.
- loosen front screw in coupling (pump side).
- take out impeller together with rotating parts of mechanical seal.
Replacing worn or damaged parts
- rear static seal ring is easy to replace; mind position of seal ring according to locking pin; always renew O-rings after removing
parts.
- take off rotating part; mind position of coil and hook; at replacing seal ring do position O-ring, coil and hook.
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© Hendor - Quality Pumps & Filters - 6 - Info 28640/R0