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Case Tractors Discussion Forum
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DB 995 still not starting

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fordfisher

09-19-2006 14:08:08




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DB 995 just died while mowing. Took off injection pump and had it tested, it tested fine. Had injectors rebuilt. reinstalled everything today bled the fuel system and nothing. there is white smoke coming from the exhaust while turning the motor over. Could it be the lift pump? How would I know? How about the motor? What happens when rings go bad?
Thanx




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richard in nz

09-20-2006 01:44:40




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 Re: DB 995 still not starting in reply to fordfisher, 09-19-2006 14:08:08  
Check the length of the push rod that works the lift pump- they wear reducing the stroke of the pump but the fuel system will hand prime fine.



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fordfisher

09-20-2006 05:05:20




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 Re: DB 995 still not starting in reply to richard in nz, 09-20-2006 01:44:40  
thanx for the replies, would a worn pushrod cause the tractor to just stop immediately and not start again? It does hand prime well.



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richard in nz

09-20-2006 23:20:16




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 Re: DB 995 still not starting in reply to fordfisher, 09-20-2006 05:05:20  
You normally get fuel starvation problems first before the tractor stops, sometimes they will run on a full tank of Diesel then pack up at about 1/2 to 3/4 full. Check fuel flow and pressure from the lift pump using the starting motor. Bleed using the hand pimer as far as the 2 bleed nipples on the injector pump, then on the CAV type DPA rotary pump that the tractor has you must slacken the injector unions and crank the engine till you get fuel right up to the injectors, tighten them while you are still cranking and as long as the pump is working and timed assuming the engine is ok you should see smoke and then the engine should fire and run.

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JGarner

09-19-2006 14:14:22




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 Re: DB 995 still not starting in reply to fordfisher, 09-19-2006 14:08:08  
Are you sure the pump was installed in time? We had a Ford 861 diesel that we had to pull the injection pump on and this happened. It could be put on a 180 dgrees out of time so it wasn't injecting on the compression stroke.



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fordfisher

09-20-2006 06:22:13




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 Re: DB 995 still not starting in reply to JGarner, 09-19-2006 14:14:22  
I dont think the timing is off because there is only one way the pump can go on the gear and the gear had not been moved since I took the pump off.



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