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4020 engine surge


 
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Toby B
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Joined: 19 Jan 2013
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PostPosted: Sat Jan 19, 2013 9:02 pm    Post subject: 4020 engine surge Reply to specific post Reply with quote

Hello, I"m looking at a 4020 to buy and in speaking to the former owner he told me after it was warmed up and under load it would surge a little. The dealer changed the injector pump but no luck. Any ideas? I hate to buy into a big problem.
Thank you
 
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Too Far Gone
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Joined: 05 Mar 2009
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PostPosted: Sat Jan 19, 2013 9:35 pm    Post subject: Re: 4020 engine surge Reply to specific post Reply with quote

We had one years ago that got to doing weird stuff like that and its cam gear was so worn you could move the flywheel like 18 degrees before the timing marks in the injection pump would move.I think its supposed to be like no more than 3 degrees.This tractor also heated after an hour of pulling.New cam gear fixed it all.
 
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David G
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PostPosted: Sun Jan 20, 2013 5:10 am    Post subject: Re: 4020 engine surge Reply to specific post Reply with quote

It could be the injector pump, or an air leak in the diesel lines going to the pump.
 
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Jethro Lilley
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PostPosted: Sun Jan 20, 2013 5:43 am    Post subject: Re: 4020 engine surge Reply to specific post Reply with quote

try something simple first... change the fuel filters.
 
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Toby B
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PostPosted: Sun Jan 20, 2013 6:56 am    Post subject: Re: 4020 engine surge Reply to specific post Reply with quote

Ok, thank you for your help.
 
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PostPosted: Sun Jan 20, 2013 10:13 am    Post subject: Re: 4020 engine surge Reply to specific post Reply with quote

Was there noise coming from the front of the engine? I think this might be an issue with my 4320.
 
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Too Far Gone
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PostPosted: Sun Jan 20, 2013 11:52 am    Post subject: Re: 4020 engine surge Reply to specific post Reply with quote

No noise at all,pulled OK,just surged and heated
 
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