AMT 4895 Specifications Information And Repair Parts Manual Download Page 2

Specifications Information and Repair Parts Manual  

     

489 & 490 Series

                                                           

4890-251-00

2

9/2016

1.  Thoroughly clean all surfaces of seal seat cavity in adapter.
2.  Using a clean cloth, wipe shaft and shaft sleeve and make certain that 

they are perfectly clean.

3.  Wet the rubber portion of new seal seat with a light coating of soapy water. 

While wearing clean gloves or using a clean light rag, press seal seat 
squarely into adapter recess. Use cardboard washer (usually supplied 
with new seal), place over polished surface and use a piece of pipe or 

dowel rod to press in firmly but gently. Avoid scratching polished face.

4.  Dispose of cardboard washer. Check again to see that polished face is 

free of dirt and all other foreign particles and that it has not been scratched 
or damaged.

5.  Wet the inside rubber portion of new seal head with a light coating of 

soapy water. Slide head onto motor shaft with sealing surface facing seal 

seat (see figure 2).

Note:

 A short “run in” period may be necessary to provide completely leak-free 

operation.
6.  Screw impeller onto shaft. Use screwdriver slot at rear of motor shaft 

(opposite the threaded end) to tighten impeller.

NOTE:

 It may be necessary to remove plug in motor end cap to expose slot. 

If removed, be sure to reinstall plug AFTER pump is completely assembled.
7.  Check if shaft turns freely by spinning impeller. If rubbing or binding is 

found, remove impeller and add a shim to shaft, then recheck. Repeat 
procedure until all rubbing is eliminated.

8.  Slide impeller seal onto exposed shaft. Screw acorn nut onto shaft and 

tighten.

9. 

Place casing seal on adapter mounting flange. Attach casing using bolts 

being careful not to pinch or “shave” casing seal. As casing is being 
tightened, periodically spin impeller to check for interference with casing.

 

Seal will produce minor drag when spinning motor shaft, but rubbing 
anywhere else must be eliminated! Otherwise, damage to pump and/or 
motor may occur.

High Head Centrifugal Pumps

Summary of Contents for 4895

Page 1: ...ACEMENT Refer to Figures 1 and 2 REMOVAL OF OLD SEAL IMPORTANT Always replace both seal seat Ref No 5 and seal head Ref No 6 to ensure proper mating of components Also impeller seal Ref No 9 should be replaced anytime impeller fastener Ref No 10 has been removed 1 Remove fasteners Ref No 3 connecting casing Ref No 12 to adapter Ref No 4 2 Remove casing Care should be taken not to pinch or shave ca...

Page 2: ... motor shaft with sealing surface facing seal seat see figure 2 Note A short run in period may be necessary to provide completely leak free operation 6 Screw impeller onto shaft Use screwdriver slot at rear of motor shaft opposite the threaded end to tighten impeller NOTE It may be necessary to remove plug in motor end cap to expose slot If removed be sure to reinstall plug AFTER pump is completel...

Page 3: ... Series 4890 251 00 3 9 2016 For Repair Parts contact dealer where pump was purchased Please provide following information Model Number Serial Number if any Part description and number as shown in parts list Figure 2 Repair Parts Illustrations Circulator Pump ...

Page 4: ...0 1 8 Impeller 4894 010 98 4896 010 98 4891 010 98 4903 010 98 4905 010 98 4901 010 98 1 includes Ref Nos 7 8 and 10 9 Impeller Seal Buna N Incl w Ref KIT Incl w Ref KIT Incl w Ref KIT Incl w Ref KIT Incl w Ref KIT Incl w Ref KIT 1 Impeller Seal Viton Incl w Ref KIT Incl w Ref KIT Incl w Ref KIT Incl w Ref KIT Incl w Ref KIT Incl w Ref KIT 1 Impeller Seal EPDM EPR Incl w Ref KIT Incl w Ref KIT Inc...

Page 5: ...Specifications Information and Repair Parts Manual 489 490 Series 4890 251 00 5 9 2016 NOTES ...

Page 6: ...Specifications Information and Repair Parts Manual 489 490 Series 4890 251 00 6 9 2016 NOTES ...

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Page 8: ...www amtpump com ...

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