ISU Antique Tractor Club Case DC Progress Update
Steiner Tractor Parts likes to help out some clubs along the way with parts for their projects. Here is an update from the Iowa State University Antique Tractor Club on the progress of their Case DC. They will auction it off at tractor shows over the summer with the proceeds going to benefit their club.
I thought that I’d let you know that the Case is coming together really well! I have attached some pictures of our progress along the way. So far the DC has come together pretty easily. We just started to prime the tractor last week and we’re going to continue with painting probably until spring break.
Thanks again!
Ben Link
Sophomore
Vice President of the ISU Antique Tractor Club
Agriculture Systems Technology
Iowa State University
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Dear Case DC Club. Please keep me informed of progress and please send pictures. Thanks, Bob Hawkes
I have a John Deere model D 1937 vintage . my question is there are two marks on flywheel . one lh exhaust open for cam timing and one impulse mark they are about 170 degrees apart . book states to align the impulse with the case mark . this clicks correctly at 0 degree and 180 degree on opposite each turn .. so the mag is correctly aligned .. my question is regarding the cam timing ( exhaust valve opening ) . If the cam is aligned so at bdc the exhaust valve just starts to open ( both marks align at the 0 degree. then the impulse will occur about 20 degrees after press stroke on the second cylinder ( #2 starts power cycle as #1 exhaust stroke starts) . this seems incorrect and the power spark should occur right when power cycle just starts … No the interesting part is that on my tractor , the exhaust valve on #1 cylinder on my tractor starts to open at about 20 degrees after the mark passes the case mark . this also makes the impulse occur at #2 at tdc . so where am I messing up? I have another model d and it is the same .. and it run s correctly..
Question #2 . I over ran the engine severely and it started to back fire .. so I removed the heads and resurfaced the valve seats. I now have reduced compression on the #2 cylinder .. So guess that means that the rings may be worn .. These 6 3/4 inch piston require a large ridge reamer .. cannot find .. so is there another way to remove pistons ? I can find a honing tool .. can I use it to remove the ridge? also if not too worn pistons / wall I’d like to just install new rings ..
anyway your thoughts please .. thank you … Robert Haug