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Thread Number: 35648
/ Tag: 50s/60s/70s Vacuum Cleaners
How Often ? |
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| Post# 382964 12/21/2017 at 13:28 (2,315 days old) by dialamaticman (Sheboygan Falls, WI) | ||
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Thanks for the info on WHAT kind of oil to use for my Royal upright, but my question was HOW OFTEN should I oil it via the filler tube ? Didn't get any response on that question, which is what I wanted to know. Thanks again ! | ||
| Post# 382987 , Reply# 2 12/21/2017 at 21:26 (2,315 days old) by huskyvacs (Gnaw Bone, Indiana) | ||
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| Post# 382999 , Reply# 3 12/22/2017 at 09:31 (2,314 days old) by dysonman1 (the county) | ||
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| Post# 383908 , Reply# 4 1/8/2018 at 21:53 (2,297 days old) by broomvac (N/A) | ||
Oiling Hoover Convertible Upper bearing
Hi dysonman1,
I noticed you said we should not oil the upper bearing in a Hoover convertible. This is contrary to what many people recommend. I have heard that I should let 3-in1 electric motor oil soak into the sleeve bearing and the felt pad surrounding it. Would something bad happen if this upper bearing was oiled? Then again, I have also heard from some that their Hoover upper bearing says "Do Not Oil". When I had my Kenmore Convertible apart, I never spotted such a message, but I didn't know where to look. If mine is a "Do Not Oil" type, where could I spot this message? Could you kindly explain to me where these contradictions are coming from? Why do some people suggest to oil the upper bearing and others don't? Are there different kinds of upper bearings? Pics of the machine in question are below. It actually has no bearing noise, but I thought I would add a drop or two of oil to the upper bearing just for good measure since it is so easy to do. But if it is something harmful, I certainly won't. Thanks | ||
| Post# 383924 , Reply# 5 1/9/2018 at 09:18 (2,296 days old) by kirbyvertibles (Independence, KS) | ||
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| Post# 383932 , Reply# 6 1/9/2018 at 10:37 (2,296 days old) by dysonman1 (the county) | ||
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Oiling a composition bearing, like the upper sleeve bearing on a Convertible, is harmful to the bearing because as the machine runs, the friction of the armature shaft at the point of contact with the bearing will turn the oil into a 'resin' (like on the bottom of a pot). The words "do not oil" are printed on the top metal bearing plate.
From the Hoover Convertible owners manual, printed 9/76, on page 18 under the heading "Lubrication": "The motor is equipped with one ball bearing and one sleeve bearing. The ball bearing should be lubricated, but the sleeve bearing should never be lubricated". | ||
| Post# 383944 , Reply# 7 1/9/2018 at 13:32 (2,296 days old) by broomvac (N/A) | ||
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Thank you for the info. I will leave it be, especially since it is running very smoothly as it is.
Interestingly, I noticed that my 1988 Kenmore (with a Hoover motor, obviously) does not have the "Do Not Lubricate" message on it. No wonder I couldn't find it. None of the NOS bearings currently on eBay have it either. However, after a bit of searching, I did find an old picture from an eBay listing for a U4171 motor which does have the warning on it. Does this change have any significance? First pic is from eBay. Second is from my Kenmore. Thanks again! | ||
| Post# 383945 , Reply# 8 1/9/2018 at 14:13 (2,296 days old) by dysonman1 (the county) | ||
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The same upper bearing was used in all Convertible-style machines as far as I know. In the 'old days', the words were printed on the bearing plate. In the past 10 years or so, I've noticed the later bearing plates did not comes with those words. However, the upper bearing still should never be lubricated with any oil or grease.
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| Post# 383981 , Reply# 9 1/9/2018 at 22:19 (2,296 days old) by broomvac (N/A) | ||
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