Posted by Shramm Guy on August 17, 2015 at 21:32:36 from (108.248.16.237):
Hello tractor experts! I'll try to keep this as brief but there are a lot of moving parts...
My antique Shramm tractor (a Philadelphia-based compressor manufacturer that briefly branched out into the air compressor / backhoe business) has a huge straight-6 block engine / compressor built on an IH 504 frame. The front 3 cylinders provide power while the back 3 compress air (if wanted). The pistons are 4" diameter and the throw is very long.
One day, about 10 years ago while scooping muck out of a pond, I had to quickly shut if off when - as I eventually discovered - a keeper let go and it swallowed an exhaust valve.
Being stubborn (and not too bright) I've spent a lot of the last 10 years boring down thru the block, removing the bent valve, manufacturing a custom valve-carrying insert and threading it into the block (not the normal procedure I'm sure but the engine is HUGE, parts are impossible to get and I'm working outdoors.) If my repair turns out to be less than perfect I plan to use oil as a coolant to keep water from getting into cylinder #2 - but, as I haven't even added coolant yet, that's not my problem...
I've repaired the slightly bent push-rod and even gone so far as to remove the timing gear cover to make sure nothing has slipped, rebuilt the 24v starter, bought 2 new batteries, rebuilt the carb and even added a pre-oil pump to lube the bearings - and yet, it refuses to start.
The timing light says everything is kosher - I can see the valves opening and closing when they should (and no, it's not 180 off), the mag is providing plenty of spark and (when choked) the exhaust smells of gasoline and yet, it refuses to start.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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