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Farmall & IHC Tractors Discussion Forum
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2 questions for a Farmall A

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Steve in MT

08-04-2005 20:36:20




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Im getting closer to having my 1940 "A" back on all four feet. After slipping the axle knee's back into the axle tube, I noticed that the knee's were angled forward to a positive caster angle. I coulda sworn that they were straight up and down, but dont remember as the tractor has been apart for a few years. I made sure the parts were all put back in the same position but doesnt look right to me. Is this the way the "A" is supposed to be? Also, is the fuel line supposed to be copper or steel? Lost the old line and am going to make a new one and can go either way. My first thought is that it was a steel line. Thanks for your time. Steve in MT

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Some more info, thanks gu

08-06-2005 06:08:37




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 Re: 2 questions for a Farmall A in reply to Steve in MT, 08-04-2005 20:36:20  
Some more info on what I did. The original front axle assembly as badly broken and welded. It looked as tho someone hit something with the right front wheel and I mean HARD. The center tube was split from the slit all the way to the pivot pin and down to the bottom of the tube. The center tube and axle knee was welded back together. I couldnt find a good center tube anywhere around this area (Billings) and had to buy one off of ebay. The replacement center tube looks to be from a lot newer tractor as it has a factory reinforcement "Cone" welded to the pivot axle shaft housing on the back side. I was able to tell which side was which as the center tube had some wear marks from the U bolt. If the center tube is mounted in a vice with the pivot shaft level, then the knee is angled either forward, or rearward, depending which side is up on the center tube. Even putting a long bolt in the end of tube shows that there is some caster in it. Checking the good side of the old center tube shows that the knees were straight up. Im guessing that some where along the IH line, a decition must have been made to give it some positive caster???. It does have a bit of positive camber as per advice left for my question. I guess Im going to go ahead and leave the positive caster angle alone and try it. I can always weld the holes shut and redrill at a later date if need be. The Threshing bee is in 2 weeks and I need to have it ready for the show. FUEL LINE, Im going to use the steel with the compression fittings. I was afraid that the copper would be too soft and break. Thank you all for taking the time to answer . Steve

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Cedric

08-06-2005 02:09:11




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 Re: 2 questions for a Farmall A in reply to Steve in MT, 08-04-2005 20:36:20  
The dimensional drawings in the Blue Ribbon Service Manual for the "A" show a caster angle of 5°, and a camber angle of 2.5°. Sid.



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Paul in Mich

08-05-2005 06:44:16




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 Re: 2 questions for a Farmall A in reply to Steve in MT, 08-04-2005 20:36:20  
Steve, Did you replace the front extensions in the same side from which you removed them? If you swapped ends, then you could very well have a positive caster or rake to the spindles. Normally, they tend to wear just the opposite in that the spindles, after years of use will begin to move toward the rear as they have on my 40 A. Either way is not anything to become alarmed about unless it is radical. The optimum position for the spindles, front to back, is of course, straight up and down. This can however be influenced by the tire configuration. Smaller front tires relative to the rear suggested matching size will cause the front end to dip and the spindles rearward, Larger front tires relative to smaller rears will do the opposite. It doesnt have anything to do with the spindle position relative to the frame of the tractor, only to the ground. As to fuel lines, they were steel from the factory, but most owners replaced the steel with copper since copper is much easier to bend and forgiving so as to make the line fit to the fittings. Also I find that the ferrules seal better on copper than on steel, which will require less tightning to prevent leaks, but thats only my observation.

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scotty

08-05-2005 06:53:15




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 Re: 2 questions for a Farmall A in reply to Paul in Mich, 08-05-2005 06:44:16  
Thanks Paul, I was going to answer this question before but decided to hold up and wait for some other replies. I guess I got mine back together the way it came apart, because mine have a slight camber to the rear. How those soybeans doin?

scotty



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Paul in Mich

08-05-2005 11:10:22




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 Re: 2 questions for a Farmall A in reply to scotty, 08-05-2005 06:53:15  
Scotty, Soys not too bad except those planted after July 1st. Corn is 8" tall, and have had some timely rains, so perhaps this year will turn out much better than last year.



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Dave BN

08-05-2005 04:06:02




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 Re: 2 questions for a Farmall A in reply to Steve in MT, 08-04-2005 20:36:20  
Not sure what your talking about the wheels? Is this on the front or back tires? Steel brake lines from the auto parts store make good gas line and it's cheap too. Dave.



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dave

08-05-2005 08:30:39




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 Re: 2 questions for a Farmall A in reply to Dave BN, 08-05-2005 04:06:02  
are the brake lines the same thread?I need a new line for my small tank on the ole distillate H,but the compression fittings on the one I took off were real strange,pointy like.



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Steve in MT

08-06-2005 06:22:14




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 Re: 2 questions for a Farmall A in reply to dave, 08-05-2005 08:30:39  
Dave, the threads are the same as fuel/brake lines .Im going to try and cut the flare off of the ends of the brake lines (5/16) and use a pair of brass compression/feroles and see if this works or not. It looks like it should. But then again, Im not the brightest crayon in the box :)
steve



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Vern

08-04-2005 21:20:13




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 Re: 2 questions for a Farmall A in reply to Steve in MT, 08-04-2005 20:36:20  
Did you have the center tube out? If so, you may have put it back with the ends swapped.

The fuel line on my S/A is steel.



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