Allis 7000 pto
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=181562
Printed Date: 08 Sep 2025 at 5:22am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis 7000 pto
Posted By: Tim NH
Subject: Allis 7000 pto
Date Posted: 04 Jul 2021 at 11:37am
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Most of the time I engage the pto on my marron belly 7000 it slams in. Even pushing handle slowly to engage. What is causing this. Thanks Tim ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Replies:
Posted By: DrAllis
Date Posted: 04 Jul 2021 at 7:07pm
| Maybe it's normal. What kind of implement ?? Do you have the engine idled down fully ?? I'd be more concerned if it was slipping under load than what you are complaining about. |
Posted By: Tim NH
Date Posted: 05 Jul 2021 at 5:30am
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PTO engagement rpms are probably around 800. I can hear a loud racket from the oil flow when I push the handle ahead. When it does that I can here the slip clutch on the rotary hay rake. Other times pushing handle ahead to turn pto on its nice and quiet, and no noise from slip clutch. I want to use it with Kuhn disc mower. PTO engagement will be around 1500. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: DrAllis
Date Posted: 05 Jul 2021 at 6:37am
| Not saying there isn't something going on, but why 1500 RPM engagement speed on the Kuhn mower?? Why not 800 ?? |
Posted By: Tim NH
Date Posted: 05 Jul 2021 at 7:50am
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That rpm is what I use on my Zetor to mow with, and the mower on start up will pull the engine down. If I used 800 rpm on my Allis it would probably stall it. But the problem is the loud noise of the oil flowing when it slams the pto on. I was wondering the pto spool needed to be looked at. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: DrAllis
Date Posted: 05 Jul 2021 at 8:05am
| But, you haven't acoually tried it on the Kuhn mower, correct ?? The rake is a low HP/torque implement and the PTO clutch might be a little aggressive on it, but on the mower it may be fine. Try it before tearing the tractor apart and try it at 800 rpm. |
Posted By: Stan R
Date Posted: 05 Jul 2021 at 8:12am
| Our hay tedder's clutch had broken springs in it and rattled upon start up. Maybe yours does too? Clutch is at the end of the PTO shaft. |
Posted By: Alvin M
Date Posted: 05 Jul 2021 at 8:40am
| Make sure the cable goes smooth at lower end my be tight |
Posted By: DougG
Date Posted: 05 Jul 2021 at 8:41am
| Id say theres clutch disc issues - really not familar with these but One Hundred series can act like that |
Posted By: Tim NH
Date Posted: 05 Jul 2021 at 12:33pm
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No I have not tried it on the Kuhn mower yet. But I will today. The slip clutch on the rake never makes noise when I use the Zetor. First Alvin I'll check the cable end. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: Tim NH
Date Posted: 05 Jul 2021 at 7:44pm
I took the clevis off, and found the lever moves fine, no binding. The cotter pin holding the clevis pin on has been changed, and was mangled. So I tried adjusting the cable some. Nothing changed. Still sounds like buzz saw cutting steel about 3/4 of the way, but quiet at the end. I hitched the 7000 to the mower, and found I would need shorten the drive shaft about 6". Then hitched the Zetor to the mower and found it comes 8" from the pto. I have not cut it yet. I need to do some measuring to make sure it will work on both tractors. In the picture by the little yellow mark. The plunger is supposed to have up to .020 clearance, not about 1/8". But it made no difference tightening up the clearance. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: DrAllis
Date Posted: 06 Jul 2021 at 12:30pm
| The 7000 has two drawbar length holes in the front. Difference between them is probably 3 inches center-to-center. Short for 540 machines and long for 1000 RPM machines. I have no idea why that implement won't connect to either tractor...strange. |
Posted By: Tim NH
Date Posted: 06 Jul 2021 at 3:06pm
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The mower is a 2 point hitch up. On the Allis pto, from detent to detent its 33.5". The Zetor is 43.5" I can't compress it without cutting it to get it on the Allis. Right now I have 12" of overlap on the shafts when its on the Zetor. I'm not going to cut it and have 5 or 6" of overlap, should I need to put it back on the Zetor. I've just ordered a shaft to fit the Allis. There's a guy two miles away that has the same tractor and mower. I'm going to pay him a visit. Thank you for your help Dr. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: Tim NH
Date Posted: 14 Jul 2021 at 5:36pm
Finally I got a chance to look at the 7000 that's nearby. But first I want to start with a couple days ago. My son is in the cab, and I watch him slowly bring pto in all the way. The pto turns slow, then almost stops, then spinning. But then I'm hearing bad bearing sound coming from the pto shaft at the back of the tractor. So I walk around and tell him I'm going to the valve body for the pto. He tells me he can here that racket upon engagement, then quiet. So he engages the the pto, and I can hear that hydraulic squealing sound coming from the pto valve body. So instantly I'm thinking there's something gone bad in there. But then in the next second I'm hearing a bearing that is chucking bad, and does not sound good at all. So the sound is just traveling down the shaft. I'm thinking the squealing sound is the hydraulic oil going by the spool valve, has it tries to turn the shaft. The bearing is that bad. The other tractor makes absolutely no noise with pto engaged. In the picture the bad bearing sound is coming from the area where the neg battery bolts on. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: DrAllis
Date Posted: 14 Jul 2021 at 5:57pm
| All model 7000's make and have a rattling noise when the PTO is running when the engine is below say about 15 to 1600 RPM. This is common and NORMAL. The warmer the hydraulic oil, the more noise you will hear. The reason for the noise is a metal (tin) oil baffle that surrounds the lower PTO output gear. It just hangs in there and this is the way they all are with the maroon chassis. Pretty sure black chassis does it as well. |
Posted By: Tim NH
Date Posted: 14 Jul 2021 at 6:28pm
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Interesting, because the other tractor is quiet. So that blows my theory. So is removal of pto valve body the next step. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: DrAllis
Date Posted: 14 Jul 2021 at 6:32pm
| The "other" tractor is an AC 7000 ??? To xplain a little better, my noise goes away above the 15 to 1600 RPM speeds and you don't hear it in the cab if the cab has floor mats and good cab isolators. |
Posted By: Tim NH
Date Posted: 14 Jul 2021 at 7:31pm
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Yes the other tractor is a late 1978 maroon 7000. Mine is a 1976 model. I never knew it made the chucking noise till I was in front of it. But the squealing noise is not heard in the other tractor, nor the chucking noise. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: Tim NH
Date Posted: 15 Jul 2021 at 6:40pm
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You were right Dr about the noise going away at higher rpm. I brought mine up to 1100 rpm. That's what rpm his was doing when I got in the cab to try the pto handle. There's absolutely no chucking bad bearing sound at all. So I just have the squealing sound from the pto valve body. Can things go bad real quick when that is pulled off the tractor. Thank you for all your help Dr. Tim ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: DrAllis
Date Posted: 15 Jul 2021 at 6:49pm
| You think you have a problem with "harsh" PTO clutch engagement. Quit worrying about whatever hydraulic squeal/noise you are hearing. You have two nearly identical tractors. Hook each one up to the implement you think you have a problem with and compare them for clutch engagement. I'm not there standing next to your tractor but I'm not yet convinced you have anything to worry about. |
Posted By: Tim NH
Date Posted: 15 Jul 2021 at 7:21pm
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All right I'll get over it, lol. Thank you again. Tim ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: tbran
Date Posted: 18 Jul 2021 at 9:12pm
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we have several 7000 's with high hours. We are finding the aluminum valve body is being deformed where the steel spools slide all the time. You may or may not have an issue as tractors are like motherinlaws no two are exactly alike. I would pull the modulator valve out and check to see if the bore is perfect and not sticking the valve. If it has a ridge on it polish it out... That is the valve removed below the inching valve. ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: Tim NH
Date Posted: 19 Jul 2021 at 10:23am
Thanks Tim for your reply. I do want to take the outer part of the valve body off. After looking in my manuals. Only a bunch of oil should come out, not other parts.  ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: MACK
Date Posted: 19 Jul 2021 at 9:23pm
| #29 and 33 will fall out. Make sure they go back in right places. They do crazy things if lost or in wrong places. MACK |
Posted By: Tim NH
Date Posted: 20 Jul 2021 at 3:54pm
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Thanks Mack, I'll be watching for them. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: Tim NH
Date Posted: 29 Jul 2021 at 11:19am
I got the new pto shaft installed, and mowed with it today. It does start the mower slowly, then comes right in. I'll run it like this till fall. Also the valve bank leaked so bad I had to change rags under it every time I used it for raking. I fixed that over the winter. When I was done mowing I felt around the valve bank, and it was dry as a cork leg, lol. It was such a joy to mow with a two wheel drive tractor again. And then not have to unhitch from it.   ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: Gregor
Date Posted: 29 Jul 2021 at 1:18pm
| Looks like the day she rolled out of the factory. Very nice. I spent many hours planting with a 7000 and a 8 row 30 in 5100 white planter. |
Posted By: Rltool
Date Posted: 29 Jul 2021 at 8:42pm
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That looks like a picture post card. Beautiful set up. Good work Tim! Staying with it & figuring out a problem payed off. Ray W. |
Posted By: Red Bank
Date Posted: 29 Jul 2021 at 8:58pm
| Beautiful picture. I have the same mower |
Posted By: Tim NH
Date Posted: 30 Jul 2021 at 6:19am
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Thanks for the compliments guys. Fixing problems in a 45 year old tractor, are like little victories. Tim ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: btred1466
Date Posted: 30 Jul 2021 at 12:15pm
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That is a nice 7000. What is the Year and Serial Number? My Grandpa had a 7000 Serial Number 2922 on his Dairy farm with a 7030 also. They were gone by the late 1990's Uncle got rid of them and bought 2 John Deere's, a 4440 and a 7800.
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Posted By: Red Bank
Date Posted: 30 Jul 2021 at 9:33pm
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Tim NH wrote:Posted By: Tim NH
Date Posted: 31 Jul 2021 at 11:04am
My serial # is 4967, 1976. The steps and hand rail came from Heitman's tractor salvage. My buddy Ted Johnston on here, picked them up for me. Its so much nicer getting in, and out. ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |