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900 b engine miss

D

Derekburkhart

New User
Hi y"all,
This is my first diesel tractor, I had just bought the other day, brought it home and started up, right away I can tell that there is a miss on one cylinder. the guy I have bought it from said it ran fine which I"m not sure if that"s true now. I didn"t take it down the road a little ways and it was still missing. the only time that would hit on all 6 cylinders is when I would wrap it up. and no I have not done any filter changing just yet. where and how do I start to check into this miss!?

Thanks
 
Could be many reasons. Not being there & hearing the miss, the easiest place to start is to change the fuel filters, although the fuel pressure gauge, if working will give you the filter condition. Next up would be a check of valve adjustment. If going deeper is needed, pull the injectors, check compression & injectors. If all that checks out, need to look @ the pump. Roger Link has a NOS 6 CYL pump listed in the classified ads, for the earlier 900's.
 
While the engine is running, loosen the nut on the injector lines one at a time. When you get to the cylinder thats missing, the sound of the engine won't change as much.
 
I, too, would want to check valve adj. I bought 401 a while ago for parts because the owner couldn't shake a miss. After filters and putzing the cyinder was quickly located by loosening injector lines. It turned out to be the ex valve on #3. The adj nut had backed all the way out and the valve couldn't open. He'd run it that way so long it ruined the cylinder.
 
If the miss disappears after the engine runs awhile check the center head for a leaking head gasket. This is a common problem with the 900B especially if it had been run overheated a few times.
 
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