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Andrew B 
Bronze Level
Joined: 10 Mar 2015
Location: B.C.
Points: 19
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 Topic: AC G bearing question
Posted: 04 Jul 2015 at 11:43pm |
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HI folks. Something went a bit sideways on my G so I'm here asking questions again.
Yesterday I heard a horrible howl and creaking from the engine behind me. Honestly thought I was going to turn around and see the thing on fire. Shut it off and upon closer inspection it's only the bearing on the shaft going to the radiator fan. PHEW I was hoping someone would know which bearing it is that I'm going to find destroyed when I pull it off tomorrow. Would be nice to order the part before working on it.
The destroyed bearing is the one closest to the belt, furthest from the fan.
Thanks so much. This little machine has been super helpful this year so far!
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DSeries4
Orange Level
Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7505
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Posted: 05 Jul 2015 at 9:25am |
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Can't help you on how to replace it. They are pressed in there somehow. On bit of advice I would give is to change the one closest to the fan at the same time. If one failed, it might be a matter of time before the other one does too.
Maybe your fan belt was too tight. That can cause bearing failure.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Bill Long
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Joined: 12 Sep 2009
Location: Bel Air, MD
Points: 4556
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Posted: 05 Jul 2015 at 10:38am |
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You know, we sold a bunch of G's but I do not remember replacing the fan shaft bearings.
Course that was over 50 years ago. Guess some things just wear out.
Yes, you press them in. Also, it is a grease less bearing. I think you have to remove the brackets then press the bearing into it. As said above might as well replace the other one too. Save a lot of time later.
Let us know where you find them and how it goes.
Good Luck!
Bill Long
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Gerald J.
Orange Level
Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636
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Posted: 05 Jul 2015 at 2:23pm |
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Parts books and shop manual are available on line at www.henselfamilyfarms/links/ The fan assembly and shaft is covered on page G-7 of the G-B-C-CA shop manual. Same page with a different picture on the G Service Manual0001.pdf.
The parts book I have says the fan end bearing which includes a snap ring is 800420 and the other with snap ring is 800421. Each probably crosses to a Timken number.
Parts probably in stock at the AC vendors on this site.
Gerald J.
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Chalmersbob
Orange Level
Joined: 11 Sep 2009
Location: Pennsylvania
Points: 2122
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Posted: 05 Jul 2015 at 8:59pm |
The bearings are different front and back. New Departure # MRC488016, fan end. MRC488503 fan end.. Yes they are pressed on. It took a 30 ton press to get mine off. I had tried a puller and heat, but wouldn't move it. My neighbor almost laughed at me when I asked to use his press. He soon found out what I was talking about after I bent a 5/8" grade 6 bolt trying to press it apart. LOL Bob
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4 B's, 1 C's,3 CA's, 2 G's WD, D14, D15, B-1, B10, B12, 712S,
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Gerald J.
Orange Level
Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636
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Posted: 05 Jul 2015 at 9:14pm |
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The shop manuals I looked at said a specific puller might work but suggested a press.
Gerald J.
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jaybmiller
Orange Level Access
Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 24697
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Posted: 06 Jul 2015 at 6:36am |
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Ok, the 'Canuck Way' to remove them is to take an angle grinder with a thin cutoff blade and 'surgically' remove the old bearing. Be sure to secure the shaft in a vice(with rubber jaws) and carefully remove a segment of the outer ring,then bearings, then go slower and cut out the inner ring. Takes about 5-10 minutes. Patience and steadiness are IMPORTANT !
Jay
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Gerald J.
Orange Level
Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636
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Posted: 06 Jul 2015 at 9:40am |
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One time I took a car rear axle to get a new wheel end bearing. The machine shop close to the parts store wasn't able to pull it because their bearing grip was broken. Trying they snapped the outer race. So they cut off the ball retainer. They set the inner race (still on the axle) on a chunk of steel about the size of a common brick. They put on safety glasses and chased me out of the shop and hit the race with a 5 or 10 pound hammer. It split, they probably polished the bearing location to take care of any distortion from that bashing and pressed the new bearing in place. It ran quiet for several years.
Gerald J.
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Andrew B
Bronze Level
Joined: 10 Mar 2015
Location: B.C.
Points: 19
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Posted: 12 Jul 2015 at 7:00pm |
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I probably did have the fan belt on a bit tight. It did crap out shortly after I had replaced and tightened the belt. Currently I'm still trying to get to the pulley off!
I'm guessing cutting or bashing the bearing out won't be too bad (hoping) but I need to get this pulley off. Wish there was another one lying around as I would cut this thing off as well!
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Skuter
Bronze Level
Joined: 21 Apr 2010
Location: Strandell, WA
Points: 76
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Posted: 13 Jul 2015 at 6:41am |
I replaced the fan bearings on G last year. They get worn out after several decades. I recommend replacing both and taking it to machine shop. It will be much quicker, cheaper, and that's why they are there. A side note, on another G a previous owner had a creative way of parallel mounting fan bearings instead bearings that fit properly. It held up for them for years (I guess). For me, it was about a half a season before it failed and took out the fan blade and radiator while returning to the barn. Fortunately I had spares, now I don't.
Good Luck Skute
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