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What's the difference between a (6466) and (6076) engine?


 
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4020guru
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PostPosted: Wed Feb 06, 2013 4:16 pm    Post subject: What's the difference between a (6466) and (6076) engine? Reply to specific post Reply with quote

What's the difference between a (6466) and (6076) engine? I understand they are both 466 blocks and the 6076 came out in the 55 series. Was just curious what the differences are.
 
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Tx Jim
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PostPosted: Wed Feb 06, 2013 4:19 pm    Post subject: Re: What's the difference between a (6466) and (6076) engine Reply to specific post Reply with quote

early 466 has belt driven water pump
late 466(50 series) & 6076 had a gear driven water pump(RE55985)

I think a 6076 has a better air flowing cyl head(part # RE58516)than a 466
 


Last edited by Tx Jim on Wed Feb 06, 2013 4:32 pm; edited 2 times in total
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4020guru
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PostPosted: Wed Feb 06, 2013 5:22 pm    Post subject: Re: What's the difference between a (6466) and (6076) engine Reply to specific post Reply with quote

TX JIM , I have a few qeustions for you , and seem like the guy that would know . I have compared a 4450 to a 4455 and I noticed that the 4450 has an aneroid and the 4455 doesnt. The 55 has a sensor going to the intake manifold . Is the 6076 electronic injection ? Which water pump drive do you think was better ? What kind of water pump drive is in the 8.1L that replaced the 466 ?
 
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skip33652
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PostPosted: Wed Feb 06, 2013 6:35 pm    Post subject: Re: What's the difference between a (6466) and (6076) engine Reply to specific post Reply with quote

the 6076 had better fuel economy( look it up in the nebraska tests) revised head, pistons, pumps and injectors. I think bigger wrist pins as well. The gear drive waterpump is better and more durable but can get water into the oil. both are rock solid engines.Paul
 
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Eric Hartman
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PostPosted: Wed Feb 06, 2013 8:35 pm    Post subject: Re: What's the difference between a (6466) and (6076) engine Reply to specific post Reply with quote

The information that I am citing comes straight from the 60 series tractor brochure. The 6076 engine had a 33 percent torque rise, a higher top ring placement on the pistons, dome shaped combustion chamber in the cylinder head, 7 hole injection nozzles, whereas I think the 466 had 6 holes in the nozzles. There are also noticeable differences in the casting of the engine block, too. I believe the injection pump has an electronically controlled governor on the 6076 and the lack of the aneroid valve. The 6076 does not seem to be nearly as difficult to start in colder weather conditions, and the sound of the engine is quite different, as the engine has a more noticeable and sharper firing/ignition, which I think comes from a little higher compression ratio and the fuel injection system. The 466 in the 50 series, when running sounds like the 466 from the 40 series, whereas the 6076 sounds like the 6081, and I do hesitate to say this, but it does also sound more like the 8.3 liter cummins when running, as compared to the sound generated by the prior Deere models.
 
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Tx Jim
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PostPosted: Thu Feb 07, 2013 4:46 am    Post subject: Re: What's the difference between a (6466) and (6076) engine Reply to specific post Reply with quote

4020guru wrote:
(quoted from post at 20:22:08 02/06/13) TX JIM , I have a few qeustions for you , and seem like the guy that would know . I


Easy on the questions. I'm an old timer and they're some "young guns" on this forum that are more up to date than I am. I can tell you for sure my 4255 isn't electronically fuel controlled but it is very good on fuel usage. It has 10,500+ hrs on it without an OH and will rd bale hay using a little over 3 GPH of fuel. My 4255 will crank in freezing weather without the aid of ether or coolant heater(no electricity in the tractor shed). I've owned the 4255 for 20 yrs. I just put the second waterpump on my 4255 @ 10,125 hrs

I know the 55 series with the 6076 engines are some of the best tractors to have the JD logo put on them!!!!!!!
 
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