12/31/2022 0 Comments Cav dpa timing marks off![]() It now runs like a champ! I am at the end of the adjustment range, but no matter - it runs great. I put that tractor back together and set the problem tractor the same - 5mm below the mark. The C or G mark (depending on whether you landed on number one or three at TDC - it doesn't matter as they are exactly 180 degrees apart) was 5 mm below the flat circlip at TDC. ![]() ![]() So I set the good running tractor to TDC using the pin in the flywheel and took a look at the pump timing marks. The small wrinkle is that I was not able to find the specification for timing advance, but I do happen to have a second identical tractor that runs very well. I followed these instructions (with one small wrinkle) and it now runs perfectly. Unfortunately there was no timing mark scribed on the engine, and it has never run really well since I changed the pump. The pump was swapped out for what I was told was the original, which I had overhauled. This post gave me what I needed to solve a timing problem on a David Brown 950 tractor with a CAV p[ump. ![]()
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