cockshutt 550

have cockshutt 550 gas go-198 herc. not the oliver built one issue is had the head completely rebuilt will hardly crank over after temps drop below 30 or so new battery swapped to 6cyl. diesel same temps cranks fine so not batt.swapped starters from other 550 no diff.always started very easy in cold before head was rebuilt wondering if shaved head raised compression too much run same oil always have mby too heavy now? i run shell rottella t15-40 sucks cuz this is the snow removal tractor suggestions would be greatly appreciated
 
machine shop did head id have to look at paper work as far as how much they shaved off cables are good and clean never messed with timing i left it where it was before head removal valves are correctly adjusted tried that several times just to make sure rake with it in the summer does good in warm weather
 
I have one in a 35 that I pull.It has had some modifications and it is a little tough to roll over unless you have a good hot battery. It has electronic ignition, and starts good if it spins over fast enough.Sorry I can't think of anything else right now. You may want to run a compression check just for fun.
 
Shaving (skimming) the head for flatness should not alter the compression significantly.

You more likely have an electrical problem or something binding in the ring gear.

If it has been tweaked to up the compression ratio, you should know that.

RAB
 
wouldnt the ring gear binding show up in warm weather too? thanks for the helpful comments everyone i have a new wiring harness mby i go that rout just a bit of a job this time of year
 
another bit of info one time tried to start cold woulnt needed it bad so pull started it ran for about 10 15 seconds stalled before i could get to choke tried to crank again and to my suprise cranked over great and started again this is puzzling?
 
My 2 cents worth, The valves sit on the deck of the head so milling it did not alter compression. I would get a voltmeter and see what kind of voltage you have at the starter when you crank it over. If less than 10.5 you have a problem with cables or connections. By the way how can I contact you? J.
 
I had a similar issue with my 1755. New batteries and starter didn't help. The advice I got on here was check the cables. They all looked good, but turns out the crimp on my ground cable where it attaches to the frame was bad.
Pete
 
If you have some decent jump leads, you can ascertain if it is the live side where the fault lies. Might need someone to set it cranking then see if cranking speed increases when jump lead added as an extra conductor. Or just try with jump leads if a bendix starter. Just be careful, so no sparks occur anywhere near a battery. For earth side check, just add a jump lead to earth side of battery (not to the connection to the battery) and tractor frame.

It should get warm or hot at any high resistance connection, if cranked a lot, but if there are two or more poor connections, they may not. My first job, if without a meter or jump leads, would be searching for a hot spot and next would be remaking the connections, ensuring bright and tight metal to metal contact.

It may be a poor solenoid if a bendix starter.

As you have checked out the battery, there is not that much left to check, really.
 
tramway guy idk but that sure is a great idea never thought of that cuz i alrdy have a ground strap from batt. box 2 frame i will check it out thanks a bunch
 

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