4020 engine surge

Toby B · New User Joined: 19 Jan 2013 Posts: 2 Report to Moderator

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

Too Far Gone · Posted: Sat Jan 19, 2013 9:35 pm Post subject: Re: 4020 engine surge

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.

David G · Posted: Sun Jan 20, 2013 5:10 am Post subject: Re: 4020 engine surge

It could be the injector pump, or an air leak in the diesel lines going to the pump.

Jethro Lilley · Posted: Sun Jan 20, 2013 5:43 am Post subject: Re: 4020 engine surge

try something simple first... change the fuel filters.

Toby B · New User Joined: 19 Jan 2013 Posts: 2 Report to Moderator

Ok, thank you for your help.

430 · Guest Report to Moderator

Was there noise coming from the front of the engine? I think this might be an issue with my 4320.

Too Far Gone · Posted: Sun Jan 20, 2013 11:52 am Post subject: Re: 4020 engine surge

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

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