Reassembling The Pump - Wilo MISO 25-125 Manual

Gland pack version
No. Description
1000 Casing
1185 Back cover
1192 Support foot
1501 Impeller
1700 Impeller nut
1800 Shaft
2070 Water deflector
2100 Shaft sleeve
2111 Spacer sleeve
2300 Logging ring
2310 Gland
2410 Gland packing
• Strip the coupling and remove the spacer if fitted.
• Unfasten nuts holding frame adaptor to pump casing
(1000) and lift off rotating element with bearing housing
(2760)
• Note: Where coupling without spacer is fitted, it will be
necessary to move driving unit away from the pump before
this operation can be carried out.
• Impeller (1501) can be drawn off after removing impeller
nut (1700)
• Remove gland(2310) & back cover (1185)
• Draw shaft sleeve (2100) off the shaft (1800)
Note: Unnecessary removal of the bearings should be
avoided because frequent removal of the bearings can
damage it and cause deterioration of the interference fit.
Bearings should be removed only, if they need close
inspection. Symptoms which will act as a guide are the
condition of the lubricant, the bearing running temperature
and the noise level during the operation.
For Oil lubricated pumps
• First drain out the oil completely
• Rest procedure for dismantling of pump is same as of
Gland Pack pumps.

9.4 Reassembling the pump

• Press the drive end bearing (2600) onto the shaft (1800),
pushing on inner ring.
• Fit the external circlip (2902-1)
• Vacuum and blow out all cavities of bearing housing
(2760)
• Mount the bearing housing (2760) onto the shaft
• Press the non drive end bearing on shaft
• Fasten the outer bearing (2753) cover assembly
• Secure the inner bearing cover (2752) assembly
• Fit the deflector (2070) & coupling key (3250)
• Place the back cover (1185) on bench. Insert the packing
(2410) / logging ring (2300) set into the stuffing box
• Fit the gland (2310) into stuffing box
• Hold the gland with nuts finger tight
• Fasten the back cover assembly to frame adaptor
• Fit the sleeve (2100) & rotate shaft (1800) check for
rubbing
• Fit the impeller key (3200) tightly, fit the gasket on front
and back side of the impeller and tap Impeller lightly into
place
• Tighten the impeller nut (1700), steady the shaft at
coupling end
Installation and operating instructions WILO Mather and Platt –MISO / PISO Pumps
No. Description
2600 Bearing
2752 Bearing end cover (NDE)
2753 Bearing end cover (DE)
2760 Bearing housing
2902 Internal circlip
2902-1 External circlip
3200 Key (impeller)
3250 Key (coupling)
4250 O ring for sleeve
4250-1 O ring for casing
4031 Lip seal
•
Check operating gap 0.5-1.5 mm in between back cover
and impeller
•
Lightly grease 'O' ring (4250) and fit
•
Stand the casing (1000) on suction flange
•
Vacuum and blow out all cavities
•
Grease the seal ring area all around
•
Lower the rotating element assembly into casing take care
of 'O' ring (4250-1) (Place the bearing housing in vertical
position for ease of assembly)
•
Fit all studs and nuts
•
Check the free rotation of shaft
•
Bolt on support foot (1192) finger tight
•
Adjust the support foot and tighten bolt
•
Fit the casing plug
For Oil lubricated pumps
•
Press the coupling end bearing (2600) first
•
Then slide in the oil thrower (1950)
•
Now place the impeller end bearing (2600)
•
Rest procedure is same as that of Gland Pack pumps
•
After completion of reassembly of pump, fill the bearing
hosing with oil of proper grade and quantity
For Vertical pumps
•
Press the non drive end bearing (2602) onto the shaft
(1800), pushing on inner ring.
•
Press the drive end bearing (2601) onto the shaft
•
Fasten the non drive end bearing cover (2751) assembly to
frame adaptor (1193)
•
Fit the Peg pin (4280) onto the shaft (1800)
•
Fit the shaft sleeve (2100) on the shaft & over the peg pin
for locking
•
Then slide in the water deflector (2070)
•
Place the back cover (1185) on bench. Insert the packing
(2410) / logging ring (2300) set into the stuffing box
•
Fit the impeller key (3200) tightly, fit the gasket on front
and back side of the impeller and tap Impeller lightly (1500)
into place
•
Tighten impeller nose cap (1650), steady the shaft
at coupling end
•
Check operating gap 0.5-1.5 mm in between back cover
and impeller
•
Lightly grease the 'O' ring (4250) and fit
•
Stand the casing (1000) on suction flange
•
Vacuum and blow out all cavities
•
Grease the seal ring area all around
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