3-6 Maintenance & Troubleshooting
MN409
Note: Shims used for axial float are located on the outboard end of the bearing in the housing. Remove
and note the quantity used at each end.
11. Remove the bottom half of bearing and gently lower shaft.
12. To remove bottom half of bearing cartridge, use eye bolts to support weight of cartridge and
then remove mounting bolts.
13. For reassembly perform the above listed steps in reverse order.
14. All machined split line surfaces of the bearing housing and seals must be coated with a sealing
compound (Curil Tor Permatex #3).
G5000, G315, G5810 and G40 Sleeve Bearing Replacement
1.
Remove bearing as listed in section “G5000, G315, G581 0 and G40 Sleeve Bearing and
Cartridge Removal”.
2.
Check to see that bearing journal and shoulders are free of nicks and burrs; dress with rubber
stone or replace as necessary.
3.
Using a clean lint free cloth, wipe bearing journal and bearing clean and dry. Shaft and bearing
bore must be free of oil.
4.
Raise the shaft as required to reassemble bearing. Install the bottom half of the bearing.
5.
Gently lower the shaft until it is in its final position.
6.
Assemble top half of bearing.
7.
Reassemble parts in reverse order of removal. Make sure dowel pins are engaged in top and
bottom halves of housing.
8.
By hand (or suitable wrench) slowly rotate the shaft 2 turns in each direction.
9.
Remove bearing as listed in section “G5000, G315, G581 0 and G40 Sleeve Bearing and
Cartridge Removal”. Inspect bore of both bearing halves for burnished (shiny) areas.
A correct burnish pattern is:
Top half of bearing
−
no burnished areas
Bottom half of bearing
−
burnish area symmetric about the 6:00 position, one to
two inches wide, covering approximately 70% of the axial length of the bearing bore.
10. If the correct burnish pattern is not found perform the following:
a.
Using the proper bearing scraping tools and/or a nonmetallic fiber pad, remove the highly
burnished areas.
b.
Clean the bearing and shaft journal with a film free solvent such as denatured alcohol.
11. Repeat steps 3
−
10 until the correct burnish pattern is obtained.
12. Wipe bearing and journal and pour fresh clean oil on bearing journal and over bearing. Be sure
to cover both inside and outside diameters with oil. Install bottom half of bearing. Use caution
to prevent damage to bearing and to prevent dirt from contaminating bearing surface.
13. Replace anti
−
rotation keys. Tabs to prevent axial bearing movement should be install pointing
toward the bearing.
14. Assemble top half of bearing.
15. Reassemble parts in reverse order of removal. Make sure dowel pins are engaged in top and
bottom halves of housing. Apply a sealing compound (Curil T or Permatex #3) to faces of lower
bearing housing.
This Manual:http://www.manuallib.com/baldor/mn409-large-ac-motors-handbook.html
