Deere 7800 starts like CRAP!

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Deere 7800 starts like CRAP!

Postby Fnschlaud4620 » Sun Mar 30, 2008 7:47 pm

Just picked up a real nice 7800, Tractor is almost mint but it is by far the WORST starting tractor on our farm!

The other day it was around 50 deg and we had to move machinery to get out the planters & spring stuff, anyway the tractor caughs and spits and shakes for like 30-40 sec before it catches its breath and runs like it should. Is this normal?

I have seen the typical full fuel rare up at startup but this is STUPID. Once it has been running and warm it is a good start but I would have thought 50 deg was warm enough?

Is there any adjustments? dont want more power just a better start.

Thanks,
Fnschlaud4620
1998 GMC K3500 180,000 1st gen Cummins H1E/HT60 twins PPE 435 injectors 5" exhaust 4l80e
Truck Pics: http://www.cummins-conversion.com/photo ... ppuser=556

http://s283.photobucket.com/albums/kk300/Fnschlaud4620/
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Fnschlaud4620
fuel screw!!!!
 
Posts: 209
Joined: Sun Jan 14, 2007 1:29 pm
Location: North Branch, MI

Postby KTA » Sun Mar 30, 2008 9:06 pm

Check that the electric fuel pump is working, but most importantly inspect all the fuel hoses coming from the tank for any dirt or moisture on them. We have a lot of problems with that braided cloth hose seeping fuel/sucking air when it gets old. It sounds like you might have a fuel drain back issue.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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KTA
diesel guru/mod
 
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Postby Fnschlaud4620 » Wed Apr 02, 2008 9:41 pm

Thanks for the help KTA, I will check it out next time I am home.
1998 GMC K3500 180,000 1st gen Cummins H1E/HT60 twins PPE 435 injectors 5" exhaust 4l80e
Truck Pics: http://www.cummins-conversion.com/photo ... ppuser=556

http://s283.photobucket.com/albums/kk300/Fnschlaud4620/
User avatar
Fnschlaud4620
fuel screw!!!!
 
Posts: 209
Joined: Sun Jan 14, 2007 1:29 pm
Location: North Branch, MI
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