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Unstyled A Clutch Dust Shield Oil Leak

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Jim Atwell

01-11-2007 19:04:29




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My '37 A has a bad oil leak around or behind the Clutch Dust Shield. I took the clutch apart, found a NOS gasket that didn't fit anymore, modifyied it and used gasket sealer. The dust shield had been repaired at one time down at the funnel shaped bottom. I was told that a hole was supposed to be in this area to allow the oil to drain back into the transmission case. Maybe the hole had been covered with weld when repaired, so I drilled a small hole back in this area. I replaced the felt washer as well. The problem is that it leaks as bad now as it did before. What have I done wrong? How can I fix this problem? Thank you for a response.....Jim

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Glen in TX

01-12-2007 12:25:07




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Jim Atwell, 01-11-2007 19:04:29  
Just taking a WAG but did you leave the fuel turned on for a long time and the level in tank went way down? Check the oil and make sure it's not diluted with gas. That and being too full will make it leak and if so get the oil and filter changed pronto and keep the sediment bowl valve turned off when not in use. A non functioning or plugged up crankcase ventilator tube and air inlet filter can cause excessive crankcase pressure to also push too much oil past main bearings to the clutch area. The groove in cover should be at bottom letting it drain back into reduction gear cover without a hole drilled in it to the outside. If dust shield is on right and not distorted or bent it should function right. You may need also need just some fresh fuel or a carb tune up or check air cleaner for obstructions to get rid of the rich condition and keep the engine temp up also with curtain or shutters and not just idling around. Might also want to try a AC 18 spark plug but new plugs won't cure the rich run condtition by themselves.

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Jim Atwell

01-13-2007 04:48:25




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Glen in TX, 01-12-2007 12:25:07  
Glen..I always turn the fuel off at the sediment bulb. That being said, the oil does seem a little dilluted, but not bad. How many quarts does this tractor hold and what viscosity would you use? I haven't had the tractor long and I was waiting till I spruced it up to change the oil and filter. When I got the tractor, the oil would not run out of the check plug and I remember having to put at least a couple of quarts in it before it would run out. Maybe that was too much. The fellow I bought it off of never acted like this leak was a problem. Does this tractor use the same filter as a 60 or 620? The air cleaner and crankcase ventillator are both alright. I know when I go to start this tractor, it spits raw fuel out of the left side petcock in just a few spinovers with the choke fully on. The right side is not as bad about this. I see why electric start is so...nice now. Anyway, thanks for the reply, Jim

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Glen in TX

01-13-2007 08:03:40




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Jim Atwell, 01-13-2007 04:48:25  
Jim, The H oil filter is the same shorter one like for the 420 & 430. JD dealer should have filter or can order or a auto supply. It was AH1111T but I believe still now crosses to AH1082R filter element. If you have to get into the carb be sure and check the float too that it isn't leaking or weighted down with fuel or dragging someplace causing a problem. You can shake the float listening for fuel inside it or also immerse the float holding it with pliers into a pan of hot water but not boiling and if it has a pin hole leak you will see bubbles spewing from the float. New floats are available reasonably without having to repair the float but sometimes the hole can be soldered up if you don't weight it back down too much with solder. You probably done read about attaching a fitting with hose barb in the drain hole of carb and using a piece of plastic hose along side carb to measure fuel level at 3/4" from top side of bowl. All those JD manuals should have a specifications data sheets in first few pages or again later in another section list capacities like oil under lubrication section which is 4 1/2 quarts total for the H. The little 4 page flyer reprint many sell is not the operators manual and it's OMR2011. Make sure you have a good hot blue spark at the plugs also and the impulse on mag is tripping like it should when trying to start. Run metallic core wire with a magneto and not the carbon core stuff.

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Mike M

01-13-2007 11:49:05




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Glen in TX, 01-13-2007 08:03:40  
Glenn ; I think he has an A not an H and the A will use the same filter as the 60,620 and they will also hold more oil for some reason I think you may need 7-8 qts ?



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Glen in TX

01-13-2007 14:50:22




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Mike M, 01-13-2007 11:49:05  
Mike your right. I had H on my mind for some reason? Unstyled A would used the same paper filter element as other letter and number series like the 620. Element AA3680R that now subs to AR26350 from JD. Yes about 8 qts. I think too for his unstyled A and 9-11 qts. for later As.



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P Browning

01-13-2007 05:01:20




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Jim Atwell, 01-13-2007 04:48:25  
Jim -- You are asking questions as if you do not have any manuals for your tractor. I strongly suggest you acquire the following two:

DIR 103 (Operating Instructions) and PC674 (Parts Catalog).

You may get them by calling (800) 522-7448 with tractor model & serial number plus credit card handy. (PatB)



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Jim Atwell

01-13-2007 05:24:53




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to P Browning, 01-13-2007 05:01:20  
Pat,

Thanks, I do have a repro. copy of the owners manual, but I could not find where capacities were listed. Maybe I overlooked it somewhwere. I haven't had the tractor to long and I figured you guys would have those figures at the top of your head. Also, I appreciate expert advice from those of you who have worked with these old tractors for many years. Thanks again, I am going to re-check that oil level today with several of you all suggesting this may be the culprit.

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P Browning

01-12-2007 08:14:02




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Jim Atwell, 01-11-2007 19:04:29  
Jim -- No, for oil to pile out like that WAS NOT normal for the Unstyled A. This problem seems to crop up every now and then, and for some tractors, there are three possible reasons this happens.

One is too high of an oil level where oil from the operating sleeve (also a slinger) returns to. For tractors like the model H which lube the pulley bushing with differential oil, accumuilated water in the main case will aggravate this issue. For other models, check oil level.

A second is (of course) lack of a path for slinging oil return. I am not eminently familiar with the oil return on the earlier models, but I HAVE put in plenty of SEAT time and have only once experienced what you are going through. That tractor was not ours, and I didn't ever learn why it threw oil that bad!

And a third possible cause is a miss-alignment of the dust cover. There must be no rubbing or scraping between the belt pulley's parts and the dust shield as it is mounted. It needs to be centered about the crankshaft with care. Again, this delicate arrangement forms a part of the oil slinging and recollection system on JD tractors.

This is an off-the-cuff and not a first-hand or experienced response so far as the model A is conerned, but may help. Please post back when you learn what was the cause. (PatB)

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Jim Atwell

01-12-2007 05:28:29




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Jim Atwell, 01-11-2007 19:04:29  
I was wondering why a hole would really help. To me, it looks like it really didn't serve any purpose. The Sheperds up in Wisconsin told me that it was supposed to have one, so I drilled one out. The tractor leaks alot while it is just idling to though. this can't be right, can it? Our 60 and 620 don't. It really makes a mess and the belt pulley even throws it against the hood. I don't have an old mechanic that used to work on these tractors close by, so I am trying to decipher it myself. Also...what is a good starting technique for these tractors? I think I have fouled my plugs (Autolite 3077's) because it takes me forever to get it going now. It didn't use to. The mag seems to be hot.Thanks again....Jim

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Mike M

01-12-2007 04:36:59




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Jim Atwell, 01-11-2007 19:04:29  
I think some of those unstyleds like my B were made with the drain back hole to dump on the ground. So they will always leak some oil,usually right after being shut off.



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Rob Hartman

01-11-2007 19:15:49




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 Re: Unstyled A Clutch Dust Shield Oil Leak in reply to Jim Atwell, 01-11-2007 19:04:29  
the bolts that hold that on originally had lead washers to seal the bolt heads because those bolts go directally into the crankcase. I just used brass washers and silicone when I put mine back on, it worked. you can get the brass washers at Menards, If I remember right they are 5/16 bolts



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