8. Maintenance
| FAILURE TO DISCONNECT AND | |
WARNING | ||
| LOCKOUT ELECTRICAL POWER | |
Hazardous | ||
BEFORE ATTEMPTING ANY | ||
voltage | ||
MAINTENANCE CAN CAUSE | ||
| ||
| SHOCK, BURNS OR DEATH. |
1.Bearings are located in and are part of the motor. For lubrication procedure, refer to manufacturer’s instruc- tions.
2.On
9.Disassembly
1.Always turn power off.
2.Drain system. Flush if necessary.
3.Remove motor
4.Remove casing bolts and pump
5.Remove motor and rotating element from casing.
6.Unscrew impeller bolt with a socket wrench. Do not insert screwdriver between impeller vanes to prevent rotation. It may be necessary to use a strap wrench around the impeller if impacting the socket wrench will not loosen the impeller bolt.
7.Remove impeller
8.Insert two pry bars (180º apart) between impeller and seal housing. Pry off impeller.
9.Remove shaft sleeve, seal spring, cupwasher, seal rotary and impeller key.
10.Remove seal housing.
11.Place seal housing on flat surface. Press out stationary seal parts.
12.Remove deflector from shaft on
13.Remove bolts holding bearing cover to frame and remove bearing cover
14.Remove lip seals from bearing frame and bearing cover
15.Remove shaft and bearings from frame (frame- mount).
16.Remove bearing retaining ring
17.Use bearing puller or arbor press to remove ball bearings
18.Remove wear ring if excessively worn. Use pry bar and/or vicegrips.
10.Reassembly
1.All parts should be cleaned before assembly.
2.Refer to parts list to identify required replacement items.
3.Reassembly is the reverse of the disassembly proce- dure.
4.Replace lip seals if worn or damaged
5.Replace ball bearings if loose, rough or noisy when rotated
6.Check shaft for maximum runout of .005" TIR. Bear- ing seats and lip seal areas must be smooth and free of scratches or grooves. Replace if necessary (frame- mount only).
7.All mechanical seal components must be in good condition or leakage may result. Replacement of complete seal assembly, whenever seal has been removed, is good standard practice.
8.If wear ring is being replaced, do not use lubricants on the
9.If the impeller is removed, as for example to effect a mechanical seal change, this procedure must be followed: Old impeller bolt and impeller
10.Install the mechanical seal stationary seat in the seal housing, using soapy water as a lubricant to ease insertion.
11.
NOTE: The shaft sleeve
11.
12.Place the impeller key into the shaft keyway and slide the impeller in place. Install the impeller stud and impeller washer. Be sure that a new impeller
13.Replace casing bolts and tighten in a crossing se- quence to the torque values indicated below.
14.Check reassembled unit for binding by rotating shaft with appropriate tool from motor end.
15.If rubbing exists, loosen casing bolts and proceed with tightening sequence again.