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Valve adjusting screws hitting valve cover???.

I

IAtractorKid

Member
Hey guys! So still slowly working on this IH 404 utility with a C-135 engine. Valve cover on the tractor was pretty beat and soldered in multiple locations. Tracked down a good used and installed it today after re-adjusting the valves again. Unfortunately the adjustment screws are hitting the valve cover....must have been what tore up the old one as well. Not all of them hit...all the screws look to be the same length. Any thoughts???? I am wondering if the valve seats are hammered into the head far enough, that the adjustment screws is set almost all the way out causing my issue. Is that even possible?

Need to check compression again and have not had any luck freeing the clutch. Split is in my near future!
 
I have seen where the rocker assy. had washer under it or shims to get the adjusters to work. sound like your seats have been cut many time if they are to deep into the head.
 
Aren't those adjuster screws on the pushrod end of the rockers? You can twirl them all day and make any change you want to the rockers and valves without moving the screws themselves. Weren't there 2 (or more) lengths of pushrods in the 113/123/135 family of engines? Maybe yours came from another engine and are too long.
 
I agree, the distance from cam lobe tip to the highest extent of the adjuster is fixed. Wrong Pushrods, wrong adjusters. Jim
 
Anybody know the correct overall length of
pushrod a C135 engine should have? Guess
I'll pull a few of mine out and measure
them since not all are hitting the valve
cover.
 
This is what this site sells.
Pushrod - Fits A, AV, B, BN, C, Super A, Super A-1, Super AV, Super AV-1, Super C, U2, U2A, 100, 130, 140, 200, 230, 240, 330, 340, 404, 424, 444, 504, 2404, 2424, 2444, 2504 (all with C113, C123, C135, C146, C153 gas/LP engines) 10.762 inch length, 0.250 inch tube diameter. Replaces: 360213R91, 357548R1, 47386D, 47385D
 
I found 3 of those 4 numbers in parts catalogs. Couldn't find 47385D. The others all are listed as interchangeable with each other. So I guess the lengths are all the same, or close enough. I'll take back any conclusion based on different lengths. But so far I'm sticking with the idea that the problem has to be on the pushrod side of things, not the valve side.

A point of clarification, the screws are hitting the top of the cover aren't they?
 
Hi Jim,

You're thinking of the valves themselves. There are two different lengths. The heads on the newer C123/135/153 engines have much shallower combustion chambers in the head so the stem length on the valves is a bit longer.
 
(quoted from post at 06:28:20 08/07/17) Hi Jim,

You're thinking of the valves themselves. There are two different lengths. The heads on the newer C123/135/153 engines have much shallower combustion chambers in the head so the stem length on the valves is a bit longer.
Click to expand...
Yes, I knew there were different valves, depending on chamber size. But I (incorrectly) had it in my head that there was a pushrod change around the time the C-135 came along. The thought probably did come from knowing of the valve difference. That is why I try to check with the books.

The only other possibility that has come to mind is that MAYBE somebody went crazy decking the block and resurfacing the head. You take enough off both those surfaces, you could cause a problem. I don't know how much/little free space was originally available above the adjustment screws.
 
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