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Slim 
Orange Level
Joined: 16 Apr 2013
Location: Indiana
Points: 510
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 Topic: I'm Stumped...
Posted: 10 Nov 2016 at 11:09am |
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So I've been working on a Kubota B7100 tractor trying to get it running. Glow plugs are good, injectors tested good, pump is pumping fuel as it should, compression is good...but it simply will not start. What am I missing here?
-Slim
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AC 1971 170 WF Gas, AC 185 Diesel WF, AC WD NF, AC '54 WD45 NF, AC 7080, AC 7030, Wheel Horse D-180 Automatic
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Dmpaul89
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Joined: 06 Mar 2013
Location: Edwardsville,IL
Points: 1689
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Posted: 10 Nov 2016 at 11:13am |
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is it making any smoke out the muffler? if it is you may need to spin it faster or warm the block if its cold
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Slim
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Joined: 16 Apr 2013
Location: Indiana
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Posted: 10 Nov 2016 at 11:16am |
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Yes, when cranking it smokes out the exhaust.
-Slim
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AC 1971 170 WF Gas, AC 185 Diesel WF, AC WD NF, AC '54 WD45 NF, AC 7080, AC 7030, Wheel Horse D-180 Automatic
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Gary Burnett
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Joined: 11 Sep 2009
Location: Virginia
Points: 3024
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Posted: 10 Nov 2016 at 11:26am |
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Hook another tractor to it and pull it that'll start a hard starter lots of times.You just might not be spinning it fast enough or not building compression pulling it will help over come both plus you won't be burning up your starter.
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WD45Diesel57
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Joined: 20 Jul 2010
Location: Varna, Ont. Can
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Posted: 10 Nov 2016 at 11:32am |
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check the timing, if its a wee bit off will make them hard to start
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1-B's, 2-C, 2-CA's,2-WF, 1-WC,1-G, 3-WD's, 2-WD45, 1-RC, 1-D17 Diesel, 1-D14, 2-D15,1-D17 row crop,1-D19 gas and All Crop 40,60,66,72,90 and 100
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kev/ont
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Joined: 12 Sep 2009
Location: Castleton Ont
Points: 282
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Posted: 10 Nov 2016 at 11:59am |
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Did u test each glow plug seperately with the common exciter strip removed? If even one plug isnt working they will be a bear to start.
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LB0442
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Joined: 27 Dec 2014
Location: Boise ID
Points: 767
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Posted: 10 Nov 2016 at 1:52pm |
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I used to have one of those. I lent it to my dinkus neighbor and he ran it out of fuel. I went up with fuel, cracked injector lines, had all kinds of fuel out them, still wouldn't run. Ran the battery down couple of times trying. Well looked it over and there is a plug on the top of the injection pump (could be on the side near the top). It was a 3cyl diesel. Cracked that while cranking, fired right up?? I guess that is how they bleed out air. Just something I ran into.
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BrianC
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Joined: 16 Jun 2011
Location: New York
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Posted: 10 Nov 2016 at 6:08pm |
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Why do we keep loaning tractors and tools to neighbors? Will we never learn?
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
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Posted: 10 Nov 2016 at 6:12pm |
pull the glow plugs, and test compression, most don't start well if its under 250-300 PSI.
Timing not much of an issue, on Kubotas, cartridge style injector pump, gasket thickness is the way you time 'em...
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