ornery
Well-known member
Servicing The 9700
Only vacuum I've really "serviced" as far as the motor goes, is the 131. I've added drops of non-detergent, straight 30 weight oil to the rear oil port, but nothing in the front.
I've assumed these 7 amp motors have ball bearings in the front, and was actually looking forward to replacing one. Seems kind of silly having that highly accessible oil port on the rear, and none on the front. That's where all the stress is. Maybe it's a simple sleeve bearing in the back, and ball bearings in the front. I don't know, but if you're worried about it, you'll have to pull it apart to get at it.
Not as hard as it sounds. A phillips screwdriver, and small "crescent" wrench, and you can be looking at that bearing in 10 minutes. I bet it's sealed, too. The 131 had sleeve bearings front and back, and the front was worn oversize/ egg shaped about .010-.015". The rear was like new. The felt packing around the front bearing was cooked and dry. I go off track in a hurry, eh?
Anyway, I'm guessing there's not much you can do to the front bearing as far as preventive maintenance. I'm SURE somebody here will chime in with the correct info about it. I think I looked at the brushes when I got it, and there was plenty of meat left. Beyond that, there's nothing to do, but run it, and run it and run it...
Only vacuum I've really "serviced" as far as the motor goes, is the 131. I've added drops of non-detergent, straight 30 weight oil to the rear oil port, but nothing in the front.
I've assumed these 7 amp motors have ball bearings in the front, and was actually looking forward to replacing one. Seems kind of silly having that highly accessible oil port on the rear, and none on the front. That's where all the stress is. Maybe it's a simple sleeve bearing in the back, and ball bearings in the front. I don't know, but if you're worried about it, you'll have to pull it apart to get at it.
Not as hard as it sounds. A phillips screwdriver, and small "crescent" wrench, and you can be looking at that bearing in 10 minutes. I bet it's sealed, too. The 131 had sleeve bearings front and back, and the front was worn oversize/ egg shaped about .010-.015". The rear was like new. The felt packing around the front bearing was cooked and dry. I go off track in a hurry, eh?
Anyway, I'm guessing there's not much you can do to the front bearing as far as preventive maintenance. I'm SURE somebody here will chime in with the correct info about it. I think I looked at the brushes when I got it, and there was plenty of meat left. Beyond that, there's nothing to do, but run it, and run it and run it...