B7800 stalls please help: Kubota Review  -- Kubota Tractors Discussion Forum and Review B7800 stalls please help: Kubota Review -- Kubota Tractors Discussion Forum

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 09-30-2006, 19:13 Post: 135586
dmnsmith5



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 B7800 stalls, please help

I have a B7800 FEL,MMM 85 hours. The engine is stalling when the tractor is moving either forward or backward. I can keep it from dying if I push the clutch in. It will idle at any RPM while sitting still and not die. It seems to stall quicker if I am going in reverse. I can travel forward a longer period before it stalls. Any ideas or help would be greatly appreciated. Thanks in advance!






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 09-30-2006, 19:17 Post: 135588
kwschumm



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 B7800 stalls, please help

Any smoke? Often these problems are filters, air or fuel, or bad/contaminated fuel. Look for water in the glass fuel bowl.






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 09-30-2006, 19:27 Post: 135589
dmnsmith5



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 B7800 stalls, please help

Yes, when I put the cutch in to prevent it from dying, there is a puff of black smoke.






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 09-30-2006, 19:28 Post: 135590
dmnsmith5



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 B7800 stalls, please help

Also, the fuel that is in the tank now is 4-6 weeks old and is on 3/4 tank.






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 09-30-2006, 20:54 Post: 135597
DRankin



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 B7800 stalls, please help

Help me out here. The B7800 I am acquainted with has a HST.

So what is the clutch for?






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 09-30-2006, 21:08 Post: 135600
dmnsmith5



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 B7800 stalls, please help

I guess its for starting purposes and swapping from L M or H speeds. Also used for engaging PTO and 4wd.






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 10-01-2006, 09:15 Post: 135604
DennisCTB

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 B7800 stalls, please help

Is the parking brake set ? Sounds like there might be some resistance somewhere if it is not casued by the other things already mentioned.






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 10-01-2006, 19:06 Post: 135611
dmnsmith5



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 B7800 stalls, please help

No, the parking brake is not set. I have driven in the past with it on, however it did not stall. This was only in low and medium speeds, never High.






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 10-01-2006, 19:15 Post: 135612
kwschumm



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 B7800 stalls, please help

Fuel can be stale right from the station. It really sounds like fuel or air starvation. Another possibility is loose material in the tank interfering with the fuel pickup. I add stabil to fuel cans before filling them up, then use a water filtering funnel when filling the tank, then add power service to the tank. Don't want any algae getting started.






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 10-01-2006, 19:34 Post: 135616
Peters

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 B7800 stalls, please help

As Ken says it definately could be dirt in the tank and filter. It would have to come from the station with the low house on the tractor.
The timing could be out also but this is not likely unless it has been bumped recently.
Both these would sound like missing engine.
It could also be something binding in the transmission or brakes not releasing. In this case you will hear the engine begin to labour.






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

Thread 135586 Filter by Poster:
Art White 2 | DennisCTB 1 | dmnsmith5 6 | DRankin 1 | kwschumm 3 | Murf 2 | Peters 3 |




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