(800) 853-2651
SHOP NOW

Tim S and others. Combine Power steering

R

Richard in Bee

Member
It's time to start thinking about getting the old 6620 out and tuning her up for harvest. I've never noticed any problems lifting the head or winging the auger out, but when coming to the end of a field it's really slow to turn. I asked about this last fall and I believe you said to start by checking the oil pressure at the steering cylinder.
Am I remembering this correctly? If so what should the pressure be?
 
I don't have a manual in front of me so I don't have a spec on the pressure....I do know that those are a tandem pump with one half looking after the main system hydraulics and the other looking after steering.
 
I don't remember the pressure ether, but I do have a book here, I will look it up after bit,and yes it is a tandem pump like Tech 7 said..and it's under the seat running off the end of the power shaft, and they can be tough to get off some times, they are threaded into the shaft with a right hand thread, some times you can drive 2 5/8" wrenches onto it and hit them with a hammer, I use to make a special wrench for them back in the old days, may have one around here yet..
 
That has got to be one of the worst jobs to do on those combines. Take the seat out and lay it on the roof, then still not enough room to work .I'm sorry but I really despise working on the 00 and 20 series combines.
 
I made most of my living working on those back in the 90's, back then I worked off a service truck, and there were a lot of them around here,, I got really good at changing belts and bearings, I had a couple of "Lewis Bearing pullers" they were great for them..I have had "every" part off of them over the years,, changing a grain bin was the worst I think, of course beater shafts were always fun too...I don't work on combines now, and don't miss them ether...
 
The steering pressure is 1750PSI.. you can check it at the cylinder in the rear..tee a gauge into the line and let it go to the stop..
 
I forgot about the beater shaft and bearings! Holy Moses when its 105 and humid its nice and toasty in the rear hood. Ugly, ugly job. I will take a rotor machine any day. . .
 
And Richard, don't get me wrong I'm not
putting your combine down . They are good
machines and I put alot of hours in both
operating and working on them. The only
thing I don't like about operating those is
the sitting off to the side business. And
that only came to be after running newer
combines that have the cab centered.
 

This is my combine but my son uses it. We did a bunch of work on it last year and I told him we now gotta get five more years out of it. I'm looking forward to the day we get a 9500 or maybe even a newer series.
After I get a few fittings rounded up I'll check the pressure and report back.
 
We bought a 6620 Side hill new in 1980, we ran it hard all through the 80's crop prices were so low then that we couldn't afford a new one,we had 8800 hours on it when we traded,and it was worn out a couple times,,but it sure earned it's keep...
 
Make sure you steer cylinder don't have a bad or loose center piston, I have seen the nut come loose and give your kind of problem,, pull it apart inspect it and re-seal it... if that is all good swap the steer valve out..
 
If the cylinder checks out good just swap the valve out with a salvage yard valve,they don't go bad that often,, and you need to be "sure" that you get one to match the # of cylinders you are using, a heavy duty or 4 wheel drive has 2 cylinders and requires a valve to match the 2, a regular axle will have 1 cylinder and needs a valve to run just 1 cylinder,, the result of not being match will cause you to turn the wheel twice as match or half as match as needed...
 
You must log in or register to reply here.

Similar threads

B
3020 steering valve Tim s?
Replies
2
Views
316
Bg in mo
B
J
3010 lost power steering
Replies
0
Views
271
Jamnjar
J
N
Question on 4630 power steering
Replies
5
Views
446
Cliff Nelson
C
C
4630 Power steering... Tim S and other experts
Replies
4
Views
503
coonie minnie
C
B
806 MCV Pressures and steering
Replies
6
Views
302
Bluegill2
B
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

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
Website Accessibility Policy

Back
Top