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Discussion Forum

Case model SC

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07-23-2008 10:15:56

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Hello Everyone,

I purchased my fathers old case model SC serial #5516615SC 11 years ago. A long story short, I didn't run it for the past 5 years. this year I decided it was time to put the old tractor back to work. to my surprise after I added gas the tractor started, but it backfires now. While it was running (roughly) I pulled each sparkplug wire one at a time. cylinder 1 and 2 impacted the engine and stalled it (these two are working). cylinder 3 and 4 had no impact. I think the intake valves in 3 and 4 are stuck open. anyone have any ideas about how to fix it without pulling the head? If not, I think i'll do an engine job on it and replace the rings/sleeves, receat new valves. however when I tried to find a price on this idea I ended up giving up. I couldn't find the parts online.

before anyone askes I replace the plugs and wires. checked the magneto on all 4 plugs. electrical is not the problem.

thank you for your help

This post was edited by PMESECK at 10:18:31 07/23/08.

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07-24-2008 05:39:05

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 Re: Case model SC in reply to PMESECK, 07-23-2008 10:15:56  
Hi Old,
Last night I pulled the valve cover off. to see if the valves where sticking. on cylinder 3 and 4 both exhaust valves had stuck and bent the push rods. :x At first I thought about pulling the head and rebuilding it but my uncle (77 years old) had told me that this wasn't that big a deal and that Case tractors where known for having alot of play room in the head for the valve lifters. So I pushed the valves down with a hammer (everyone cringe) to there max depth. Moved the rocker arms and pulled the lifters. I then used a hammer and anvil to get them straight. While the lifters where out I had plenty of room to work the two valves free. using transmission fluid to work them loose. when they finally freed up so that pushing them down they wouldn't stick at all I put the lifters back in and set the gap to .015 on all the rockers. I then capped it, put the plugs back in and started it up. You should have seen the carbon shoot out the exhaust. lol. two minutes later it's purring like new. In second gear I can get the front end off the ground again.
My uncle told me that if I put half a quart of transmission fluid in the oil I would have the issue with the valves sticking ever again. Anyone else ever hear about this?

Also I'm converting my SC to a 12 volt system. I have an original generator 6v that came on the tractor. Does anyone know how much I can get for it? it's the original as stated that you have to oil the bushings when it start squeeking. It does still work i think because: I was running it and I touched the battery feed from the generator to the tractor and saw sparks, I do not have a battery on the tractor right now so It couldn't of been a backcharge.


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07-24-2008 08:58:04

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 Re: Case model SC in reply to PMESECK, 07-24-2008 05:39:05  
Glad to hear it runs well (and sounds like it bucks with enthusiasm as well).

I don't think you will probably get much for the generator. at least from what I have seen on ebay, they don't bring much (if they even sell). I would post it in the classified sections on this board and see if you get any bites.

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07-24-2008 07:50:05

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 Re: Case model SC in reply to PMESECK, 07-24-2008 05:39:05  
Yep ATF or MMO in the oil and also put 1qt. per 5 gal of gas and that helps keep things freed up. I use ATF because it cost about half of what MMO does and works as good. Plus if you have a local transmission place a lot of times they will give there used stuff for free. Then you just filter it and then burn it in the gas. I have a VAC abd a JD-D soaking right now because both are locked up and maybe one of these days they will pop free. I'm in no hurry since I have to many irons and not enough fire LOL

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07-23-2008 18:09:13

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 Re: Case model SC in reply to PMESECK, 07-23-2008 10:15:56  
Yeah, finding parts was difficult. There are a couple of places that have them (Don L, John S, otto engine works). I know they have valves, but sleeves are going to be tougher to find, and expensive when you do find them (new $111 each). I haven't tried to find rings, but hopefully those aren't as hard or as expensive.

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Alan Golden

07-23-2008 21:42:16

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 Re: Case model SC in reply to patsdeere, 07-23-2008 18:09:13  
There is a set of rings for sale currently on eBay.

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07-23-2008 14:03:10

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 Re: Case model SC in reply to PMESECK, 07-23-2008 10:15:56  
Theres a few things you can try that may work. Fill those 2 cylinders with tranny fluid and then turn the engine just enough to get some fluid out the intake. Stop let it sit a day or 2 then spin it over more. Be sure to keep the plugs in so it will force the fluid up and into the valves. You may still have to pull the valve cover so you can turn the valves some to free them up but you stand a good chance they will pop free. BTDT many times on a lot of tractor I get that are locked up and most have valve that stick. If at any point it hydro locks on you pull the plugs out and stand back because it could shower you with tranny fluid also BTDT and a tranny fluid shower is not fun

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