alternator rear bearing install

[dart14]

what is the correct installation depth of the rear bearing on a roundback alternator ? Should it sit flush to the rear case ?
Pic 1 is current alternator where bearing sticks out about 3/32 from rear case
Pic 2 shows inside of rear case where bearing is flush to inner case
Pic 3 is previous alternator where bearing is flush to rear of case
I dont want to hammer the bearing in any unless necessary. The unit spins freely and the bearings seem tight

 

[RJRENTON]

what is the correct installation depth of the rear bearing on a roundback alternator ? Should it sit flush to the rear case ?
Pic 1 is current alternator where bearing sticks out about 3/32 from rear case
Pic 2 shows inside of rear case where bearing is flush to inner case
Pic 3 is previous alternator where bearing is flush to rear of case
I dont want to hammer the bearing in any unless necessary. The unit spins freely and the bearings seem tight
View attachment 1602229

View attachment 1602235

View attachment 1602236

I've always PRESSED in the bearing flush with the case. IMO.....NEVER HAMMER THE BEARING...press it in while supporting the case to prevent damage to the case. Caged needle roller bearings are delecate. In addition, I always add a small dab of synthetic grease to the bearing's rollers, when reassembling the alternator.
BOB RENTON

 

[jimbosride]

BOB RENTON

 

[493 Mike]

I've always PRESSED in the bearing flush with the case. IMO.....NEVER HAMMER THE BEARING...press it in while supporting the case to prevent damage to the case. Caged needle roller bearings are delecate. In addition, I always add a small dab of synthetic grease to the bearing's rollers, when reassembling the alternator.
BOB RENTON

Also note the plastic shield on the end of the rotor which keeps grease from leaving the rear bearing area-it covers the bearing extending past the inside of the case. Another clue!
Mike

 

[RJRENTON]

Also note the plastic shield on the end of the rotor which keeps grease from leaving the rear bearing area-it covers the bearing extending past the inside of the case. Another clue!
Mike

The seal is in the open end (shaft end) of the bearing, its elastomer is dependent on the manufacturer....be it Fafnir, Tortington, SKF or RBC.....usually it's synthetic rubber lkke EPDM or Viton......just my opinion of course....
BOB RENTON