Posted by Dan Osborne on July 31, 2012 at 10:23:06 from (98.20.50.193):
Decided to mess with this again. Posted back in march and got varying answers. I bought this tractor from a gentleman that said he quit using it because it just became such a bear to get started even after he replaced the glow plugs. Found on a Red Power forum that engine won't run if return line is pluged. Remove line from pump, and sure enough, I could not blow through line. Thought I found the problem. So I put a hose barb on pump and ran a line into a bucket. Still won't run. I pulled all glow plugs and when cranking engine over, I get diesel vapor and air out of glow plug holes. However, when glow plugs are in, I do not get white smoke out of exhaust. I have a good running 560 diesel to compare it to, and when it cranks over before starting, I get white smoke out the exhaust. Where do I go from here? I can't pull start since it's a hydro. How do I check compression on this engine before I spend hundreds on a pump rebuild if that is what is needed? Tractor seems to be in awfully good shape considering tach shows over 8000 hours. However tach goes to 3000 rpm with a 2700 rpm pto, so I'm not sure the tach is origional. Wheels and tires and paint are not origional. I though the late 656 diesels were governed to 2300. Any advice would be greatly appreciated!
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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