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Antique Farm Tractors Vintage farm tractors on rubber tires with various implements. Ford, John Deere, Oliver, McCormick and more.

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Pinion Bearing Drag


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  #1  
Old 09-02-2007, 03:12:47 AM
Raymond Raymond is offline
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Default Pinion Bearing Drag

Anyone have a good number for the pinion bearing preload drag on a Long 460 DTC (center drive) front drive axle (pinion only without seal,new bearings.) I'm at about 12 inch lbs which I believe is a little light but an additional 12 may take several more hours. Making shims is a pain in the butt and slow going.
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Old 09-02-2007, 10:22:59 AM
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Gary Pflum Gary Pflum is offline
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Default Re: Pinion Bearing Drag

I don't have the spects you need however I can tell you that 12 in lbs. is light. Passenger car rear ends are set to about 25 in lbs.. When I build a large truck third member the pinion is set much higher. Run up to a Case or JD dealer and ask them if they have internet access to a mechanics spec program. This is a program that the dealer ussally subscribes to.
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Old 09-03-2007, 05:12:19 PM
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Default Re: Pinion Bearing Drag

I took out .0025" and it went to 36 lbs.in. breakaway and 33 lbs.in. rolling . There's a 6 lb.in. variation I can't explain except for maybe the outer bearing cup bore was a slip fit; you could rotate the race with your thumbs but the clearance wasn't over .001" if that much. I dropped it in with a coat of Loctite 620 and left a few hundred pounds on it overnight. It may have a thousandth cock from the thrust face at the bottom of the bearing bore. At the speed and distance this axle will run I believe it will do well. Any comments?
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Old 09-03-2007, 10:15:51 PM
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Default Re: Pinion Bearing Drag

Sounds like your in the ball park. The loctite will work just fine. We use to call that "dutch fit" when we would center punch a race bore or now days use lock tite. Your there. Build the rest and don't worry.
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Old 09-04-2007, 07:07:52 AM
John Schwiebert John Schwiebert is offline
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Default Re: Pinion Bearing Drag

Is the 460 a Fiat copy? If so what model? I do have some Fiat manuals. However I am gone till the end of the week so will not have a chance to look.
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Old 09-04-2007, 11:16:44 AM
Raymond Raymond is offline
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Default Re: Pinion Bearing Drag

I'm pretty sure it's a Fiat design. I looked at an Allis Chalmers 5050 recently and it was identical to mine other than the shuttle shift and 4wd and slightly different steering cylinder arrangement. Ive read that these AC's were built by FIAT. The Long 460 DTC was built by UTB in Brasov Romania. Almost every part has Romania on it.
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Old 09-04-2007, 12:35:09 PM
John Schwiebert John Schwiebert is offline
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Default Re: Pinion Bearing Drag

It is a Fiat design. (so are some of the A-C models). We sold the Fiat's when I worked for an Oliver dealer, never worked on the ring & pinon. Is this a 3 or 4 cylinder and about what horsepower?
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Old 09-06-2007, 01:14:34 PM
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Default Re: Pinion Bearing Drag

It's a 3 cyl 2.3L 42 HP. 4 speed synchro, no reverse, 2 speed range with shuttle shift giving 8fd, 8rev. 2 mode pto with pto clutch lever. 4 way front -end loader.
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Old 09-21-2007, 12:20:10 AM
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Default Re: Pinion Bearing Drag

Got it running; had to leave .014" backlash because the tooth contact began to pull away from the Heel. It's quiet I believe and runs cool' but I can't be sure of the noise because the final drive gears whine so loudly. Is this normal or do I need to pull appart the final drives. I changed the oil in them and didn't find anything but fuzz on the magnetic drain plug. I know the tire sizes are not perfect because after rolling a few feet it can't be shifted and it won't roll except on a good slope. Is there a normal tolerance for tire diameter error on 4 wheel drive tractors? I'm sure it's almost impossible to get a perfect match to eliminate circumferential wind up or bind so there must be an acceptable range. It will spin all 4 wheels idling against an immoveable object.
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