Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile    Log inLog in 

Difference between a JD6600 and a 6620


 
Post new topic    
View previous topic :: View next topic  
Author Message
ratskinner
Regular


Joined: 15 Oct 1999
Posts: 136


Report to Moderator

PostPosted: Tue Dec 19, 2017 4:17 pm    Post subject: Difference between a JD6600 and a 6620 Reply to specific post Reply with quote

I have been farming for 20 yrs with 6600 I have come across a 6620 with low hrs.Curious what the difference is between them is,I would like to keep one of my 6600 for parts .I know the 6620 has a swing out auger and a different cab are the internals the same?
 
Back to top
View user's profile
GreenEnvy
Long Time User


Joined: 08 Oct 2012
Posts: 1332


Report to Moderator

PostPosted: Tue Dec 19, 2017 4:45 pm    Post subject: Re: Difference between a JD6600 and a 6620 Reply to specific post Reply with quote

The straw walkers are longer. The 20 series did away with the bicycle chain cylinder adjustment. I think a lot of the separator is the same other then the walkers if you are comparing it to a yellow cab Titan 6620. I know my neighbor robbed a few parts off our 7700 to get his 6620 going. After he was done he brought them back.
 
Back to top
View user's profile
2002sliverado
Long Time User


Joined: 06 Nov 2014
Posts: 627


Report to Moderator

PostPosted: Wed Dec 20, 2017 6:27 am    Post subject: Re: Difference between a JD6600 and a 6620 Reply to specific post Reply with quote

The largest differences between the 6600 and 6620 Titan (early with yellow cab tops) was the cab improvements, larger grain tank, the added 2 foot step on the walkers, the turret style discharge auger, a modest bump in horsepower, a step up to the 466 diesel engine, and the cylinder drive and feeder house drive were changed to the "posi-torque" drive set up. I suspect the straw chopper may have been beefed up, too. The internals of the machine were not significantly changed, as the cylinder and concave were all the same size as the 6600, as was the cleaning shoe. Unless one was operating in conditions where some added horsepower was needed, I have never thought one would see any significant gain in capacity between a 6600 and a 6620. It was with the Titan II series, with the green cab top, where the cleaning shoe was lengthened, as well as sped up, where a measurable gain in capacity could be expected. We had a 7700, but never upgraded to a Titan or Titan II to compare. Again, as I recall from my reading up on the machines when they were new, there really wasn't anything changed internally to bring an increase in capacity. I remember going to a farmer meeting in preparation for the upcoming fall in the early 1980's, and being told of all the changes of the machine itself, between the older 6600/7700 and the 6602/7720 Titans. I approached the "block man" from Deere who had presented and asked him if any of these changes could truly result in an increase in overall capacity. His response was a "corporate response" and I continued to press the issue. He finally admitted the only substantial changes "internally" in the machine was the added 2 foot step to the straw walkers, and it would likely only be in conditions where power was truly needed, a modest increase in capacity may be experienced.
 
Back to top
View user's profile
GreenEnvy
Long Time User


Joined: 08 Oct 2012
Posts: 1332


Report to Moderator

PostPosted: Wed Dec 20, 2017 12:02 pm    Post subject: Re: Difference between a JD6600 and a 6620 Reply to specific post Reply with quote

I think the capacity differences might have been more noticeable in small grains. The extra length on the walkers did help in those crops. There is a reason why Massey kept lengthening the walkers on their combines after JD introduced the 00 series and again when JD introduced the 20 series. And JD did make the concave slightly bigger in the 20 series by adding one more bar and they advertised the beater grate area had been increased 51% over the old 00 series grate. The bigger shoe on the T2 I thought was more for the corn belt because we didn't see any difference between our Titan 8820 and T2 8820. The grain would almost start going out the walkers before the shoe. Corn might be different though. All it did for us was the shoe flew apart on the 8820 T2. After we go it back together we put the regular Titan sprocket on it to slow the shoe down and never had problems after that.
 
Back to top
View user's profile
ratskinner
Regular


Joined: 15 Oct 1999
Posts: 136


Report to Moderator

PostPosted: Thu Dec 21, 2017 4:46 pm    Post subject: Re: Difference between a JD6600 and a 6620 Reply to specific post Reply with quote

So the straw walkers from the 6600 will not go into a 6620?
 
Back to top
View user's profile
ajl
Regular


Joined: 05 Jan 2013
Posts: 186


Report to Moderator

PostPosted: Tue Dec 26, 2017 7:39 am    Post subject: Re: Difference between a JD6600 and a 6620 Reply to specific post Reply with quote

Longer walkers are significant in small grains where walker loss is an issue. Would definitely prefer a 20 around here for that reason.
 
Back to top
View user's profile
fdt860
Long Time User


Joined: 03 Jun 2008
Posts: 839
Location: Kansas

Report to Moderator

PostPosted: Fri Jan 05, 2018 1:48 am    Post subject: Re: Difference between a JD6600 and a 6620 Reply to specific post Reply with quote

CVPost-greenenvy wrote:
(quoted from post at 13:02:26 12/20/17) I think the capacity differences might have been more noticeable in small grains. The extra length on the walkers did help in those crops. There is a reason why Massey kept lengthening the walkers on their combines after JD introduced the 00 series and again when JD introduced the 20 series. And JD did make the concave slightly bigger in the 20 series by adding one more bar and they advertised the beater grate area had been increased 51% over the old 00 series grate. The bigger shoe on the T2 I thought was more for the corn belt because we didn't see any difference between our Titan 8820 and T2 8820. The grain would almost start going out the walkers before the shoe. Corn might be different though. All it did for us was the shoe flew apart on the 8820 T2. After we go it back together we put the regular Titan sprocket on it to slow the shoe down and never had problems after that.


The longer straw walkers were introduced for European market on black interior 700 series for 1976.
As usual, JD did copy MF as far as treshing systems goes. Still, the Deere 20 series carries the MF510 drives layout that is overly complicated versus the simple layout of the MF760-860.
Only thing Deere did better than MF on 20 series is the rubber mounted cab, and the trumpet style final drives on 8820 so you can dual them up.
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> Combines and Harvesters All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  

TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

YT Home  |  Forums

Modern View Forum powered by phpBB © 2001, 2005 phpBB Group

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters