Maintenance/repair
zh-CHS
安装及操作说明 Wilo-Atmos TERA-SCH
83
9.5.3
Dismantling the rotating element
注意
Avoid damage to the impeller during removal!
If the impeller is too tight, carefully heat the impeller shrouds uniformly inwards
towards the hub.
Identical steps for all pump types
ƒ
Remove the coupling screws/nuts of the coupling.
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Remove the bolts (1) of the bearing housings (2, 33).
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Lift the rotating element.
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Remove the coupling.
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Remove bearing housings of both drive end (2) and non-drive end (33).
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Remove both drive end and non-drive end bearings (3) using a puller.
Never try to
extract the bearing by applying force to the outer race!
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Remove supporting ring (4) from the non-drive end of the shaft (24).
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Remove water throwers (6) from both sides of the shaft (24).
Further steps for gland pack version
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Remove bolts (40) for the gland covers (37).
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Remove gland cover (37) and gland (38) from the shaft along with logging ring (39).
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Unscrew and remove the sleeve nuts (36) on both sides.
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Carefully extract o-ring (35) from the sleeve (34) with a suitable tool without
damaging it.
ƒ
Remove the wear rings (25) from the impeller (21).
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Clean the shaft to make it ready for removal of the sleeves.
ƒ
To remove the sleeves effortlessly, apply some molly cream or grease on the shaft
and slide the sleeves over it
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Mark the position of impeller (21) on the shaft (22) to ease the reposition it while
reassembling!
ƒ
Remove the impeller (21) carefully.
Avoid damage to the impeller key (14)!
Further steps for mechanical seal version with sleeves
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Remove bolts (28) for the mechanical seal cover (7).
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Slide out the mechanical seal cover (7) carefully over the shaft (22).
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To ease the positioning while reassembling, mark the position of mechanical seal (9)
on the shaft (22).
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Pull the mechanical seal (9) carefully over the shaft.
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Remove the abutment ring (10).
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Unscrew and remove the sleeve nuts (36) on both sides.
ƒ
Carefully extract o-ring (35) from the sleeve (34) with a suitable tool without
damaging it.
ƒ
Remove the wear rings (25) from the impeller (21).
ƒ
Clean the shaft to make it ready for removal of the sleeves.
ƒ
To remove the sleeves effortlessly, apply some molly cream or grease on the shaft
and slide the sleeves over it
ƒ
Mark the position of impeller (21) on the shaft (22) to ease the reposition it while
reassembling!
ƒ
Remove the impeller (21) carefully.
Avoid damage to the impeller key (14)!
Further steps for mechanical seal version without sleeves
ƒ
Remove bolts (28) for the mechanical seal cover (7).
ƒ
Slide out the mechanical seal cover (7) carefully over the shaft (22).
ƒ
To ease the positioning while reassembling, mark the position of mechanical seal (9)
on the shaft (22).
ƒ
Pull the mechanical seal (9) carefully over the shaft.
ƒ
Remove the abutment ring (10).
ƒ
Remove the wear rings (25) from the impeller (21).
ƒ
Mark the position of impeller (21) on the shaft (22) to ease the reposition it while
reassembling!
ƒ
Remove the impeller (21) carefully.
Avoid damage to the impeller key (14)!
