450G starting issue

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countrycrawler
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Joined: Sun Mar 08, 2009 11:41 am

450G starting issue

Post by countrycrawler » Sat Jul 14, 2018 9:51 pm

Hey guys,
Im looking for your ideas on a starting issue on a 1996 450G. Dozer starts easily when cold but after it's ran for about 30 minutes, and you shut off the engine, it will just sit and crank till you kill the battery, and never start back. You can hit it with a small shot of starting fluid, and it will fire up, and run fine till you turn it off again, Then same issue again. I've changed the lift pump thinking maybe it was causing the problem, but no such luck. What are your guys thoughts as to where to start looking for the problem. Thanks in advance for your help.

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DrLoch
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Location: Mebane NC

Re: 450G starting issue

Post by DrLoch » Sun Jul 15, 2018 7:17 am

Have you changed/checked the filter? Mine is between the lift pump and inlet of IP. Loosen and/or remove line feeding IP, press handle on lift pump to make sure you have a good flow of fluid.

Only other thing would be that the IP pump outlet pressure is low when it gets hot which would mean the head is worn.
450C Track Loader
291457T

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gregjo1948
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Re: 450G starting issue

Post by gregjo1948 » Sun Jul 15, 2018 8:43 am

May be low compression after it gets to operating temperature.
JD 350B diesel 6way blade, Case 580B Loader/backhoe, Farmall 504 high crop w/ flail boom mower, International 404 , International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller, Allis Chalmers D17, 1620 Ford

countrycrawler
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Joined: Sun Mar 08, 2009 11:41 am

Re: 450G starting issue

Post by countrycrawler » Sun Jul 15, 2018 12:49 pm

Thanks for the replies. I think I'll change the fuel filter tomorrow just to see if that makes any difference.
If it turns out to be the IP head being worn, is that something that can be rebuilt, or would the pump have to be completely replaced?

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77 Ford
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Re: 450G starting issue

Post by 77 Ford » Mon Jul 16, 2018 7:10 am

It's been posted 50 times and I don't know if it's ever fixed the issue but....have you checked the vent on the tank to make sure it's not creating a vacuum and making it harder than normal to start?
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countrycrawler
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Joined: Sun Mar 08, 2009 11:41 am

Re: 450G starting issue

Post by countrycrawler » Tue Jul 17, 2018 10:15 pm

77 Ford, I appreciate the reply. I spoke to a Mechanic at a local John Deere dealer today, and explained my situation to him. His suggestion was to check the fuel cap, to see if the vent was clogged. Haven't had a chance to check the cap yet, but have noticed pressure in the tank when I go to refuel.

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