MDX [en-US]
38
10.2.2 Impeller Removal with Release Ring Assemblies
WARNING
Energy can be released during disassembly of the tightened Impeller. Break loose devices, lifting devices and
Impeller release rings could spring suddenly and injure nearby personnel.
Push off bolts should never be left in the release ring segments during pump operation. There is a chance that
the push off bolts could work loose and become projectiles that could cause equipment damage or personal
injury. If the push off bolts are turned in too far in the segment in which they are installed, they could keep the
ring from fitting properly against the shaft.
Remove the release ring:
o
Loosen and remove the three socket head cap screws that hold the three
segmented pieces together.
o
Install push off bolts and gently turn the first push off bolt with a wrench
1/8 turn.
o
Move to the next push off bolt in the same segment and repeat. Continue
with the next push off bolt in the adjacent segment, proceeding around
the shaft multiple times until the segments fall out.
Push off holes are drilled and tapped in the segmented ring so bolts can be used
to push the ring segment away from the shaft allowing the segment to be removed.
Impeller release rings come with nylon set screws in push off bolt locations to
protect the threads. Ensure the threaded holes are clean before installing a push
off bolt to remove the segment. If necessary, a tap can be used to clean out the
threads before using the push off bolts.
Push Off Bolts
10.2.3 Impeller Removal with Optional Release Ring Tool
WARNING
Energy can be released during disassembly of the tightened Impeller. Break loose devices, lifting devices and
Impeller release rings could spring suddenly and injure nearby personnel.
For large highly loaded pumps in corrosive environments, an IRR (impeller release ring) tool may be more effective. To order
this tool, GIW part number 2009B, contact your GIW / KSB representative.
Remove the stuffing box gland if clearance is required for the IRR tool.
Remove one IRR parting line socket head cap screw (SHCS).
Loosen the tool tab bolts just enough so the tab can move a little.
Lay the tool on top of the IRR segment in which the IRR parting line SHCS was removed
Position the tool such that the tool tabs fit into the grooves at each end of the IRR segment and verifying the slots in
the tool align with the push off holes in the IRR (the tool only fits in one direction)
1 Tab Bolts
2 Tab
3 Push Off Holes
1
2
3
Summary of Contents for GIW MDX
Page 53: ...MDX en US 53 14 Notes...
