8070 won't move.
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=204730
Printed Date: 06 Jan 2025 at 2:28pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 8070 won't move.
Posted By: lentsch
Subject: 8070 won't move.
Date Posted: 27 Dec 2024 at 7:21pm
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8070 with power director suddenly stopped moving. Power steering, hydraulics, and PTO still work. Trans light goes out like normal. I haven't checked the pressure with a guage yet. Before this happened it felt like it wanted to start out in high range, then when clutch pedal was nearly released it would downshift. I'm thinking it's gonna need a split, just wondering what the problem may be. Need a little help with diagnosis before I make myself a lot of unnecessary work. TIA. ------------- WD,D15,190XT,7000,8010x2,7060,8070 |
Replies:
Posted By: Lynn Marshall
Date Posted: 27 Dec 2024 at 8:33pm
| Sometimes, the tie strap that holds the range cable in its notch under the floor board breaks. If that happens, you won't be able to put it in high or low range. Also, with the engine running and the clutch pedal up,can you put it any gear without grinding? |
Posted By: AC720Man
Date Posted: 27 Dec 2024 at 10:55pm
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Good call Lynn, I fixed my neighbors 8070. Criss crossed tie wraps broke after 40 years. 2 new ones resolved the issue. Pull the seat, access panel and there is the location of the culprit. At least on my neighbors tractor. ------------- 1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD |
Posted By: lentsch
Date Posted: 27 Dec 2024 at 11:20pm
------------- WD,D15,190XT,7000,8010x2,7060,8070 |
Lynn Marshall wrote:Posted By: DrAllis
Date Posted: 28 Dec 2024 at 6:25am
| If the range shift /park lever cable or cable clamp is the problem, the Park lever will feel terribly funny with little drag on it when shifting.. |
Posted By: tbran
Date Posted: 28 Dec 2024 at 8:53am
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Question, when you have the unit running, can you shift gears w/o grinding ? IF so - the issues are hyd or mechanical in the power director mechanical rotating unit.
------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: Lynn Marshall
Date Posted: 28 Dec 2024 at 10:24am
| With the engine running, clutch pedal up,do you get the grinding noise when shifting the range lever into either low or high? |
Posted By: lentsch
Date Posted: 28 Dec 2024 at 6:51pm
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i'll check the range lever tomorrow and report back. Worked on the grand sons snowmobile most of the day today, now the snow is mostly gone, oh well... ------------- WD,D15,190XT,7000,8010x2,7060,8070 |
Posted By: Unit3
Date Posted: 28 Dec 2024 at 10:21pm
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I drove an 8070 home in 6th gear low range once because the tie strap on the top end of the cable just under the side console broke. ------------- 2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C |
Posted By: lentsch
Date Posted: 29 Dec 2024 at 8:53pm
------------- WD,D15,190XT,7000,8010x2,7060,8070 |
Posted By: Lynn Marshall
Date Posted: 29 Dec 2024 at 9:47pm
| I don't think that it's getting into either high or low range. Therefore it won't move. With a little help,you may be able to watch from outside while someone else shifts the range lever in the cab. The outer shell of the cable needs to stay still and not move while shifting. Only the inner part of the cable moves. The problem is probably under the cab,but it's easier to look at the upper part in the cab first. |
Posted By: DrAllis
Date Posted: 29 Dec 2024 at 10:35pm
| Let's try a new shifting test. Have the engine running at 1000 RPM and your foot OFF the clutch pedal. Jam the 5-speed transmission into 1st gear. Then, jam the range transmission into HIGH range. Then, shift the range lever into neutral and wait 5 seconds and jam it into LOW range. Do all this shifting with your foot off the clutch pedal!! If you feel the tractor trying to move the least little bit, then lets flip the Power Director lever/switch into HIGH range and see what happens while everything is still in gear. If the tractor still doesn't move but feels like it is trying to move, the splines inside the Power Director clutch housing are gone. |
Posted By: lentsch
Date Posted: 29 Dec 2024 at 10:46pm
------------- WD,D15,190XT,7000,8010x2,7060,8070 |
Posted By: Lynn Marshall
Date Posted: 30 Dec 2024 at 12:57pm
| I worked on a 7060 once that had sheared the splines in the large coupler that connects the transmission to the rear end. Very odd failure. However, it made a very obvious, ratcheting noise, when in gear and not moving. I replaced the coupler and the input shaft to the rear end on that one. When the splines strip in the power director housing, you won't hear it. Also, not a common failure, but I've seen it a few times. |
Posted By: lentsch
Date Posted: 31 Dec 2024 at 9:03pm
------------- WD,D15,190XT,7000,8010x2,7060,8070 |
Posted By: DrAllis
Date Posted: 31 Dec 2024 at 9:13pm
| If it is that way in both low and high on the Power Director switch on the steering column, I would say yes. You could try running 5th gear using the clutch to nicely get it in gear and then grind in the range trans into LOW and see if it makes sense. |
Posted By: lentsch
Date Posted: 31 Dec 2024 at 10:09pm
------------- WD,D15,190XT,7000,8010x2,7060,8070 |
Posted By: DrAllis
Date Posted: 31 Dec 2024 at 10:23pm
| If you can "hear" the Power Director clutches shifting and the red light blinks at you, I think your pressures are fine. |
Posted By: SteveM C/IL
Date Posted: 01 Jan 2025 at 12:46am
| As the first step in splitting,drain trans and pull off the bottom plate where the screen is.....see how much metal is laying there. That would help confirm a teardown. |
Posted By: DrAllis
Date Posted: 01 Jan 2025 at 6:47am
| Actually, if you dropped the sump directly under the Power Director clutch, and reached up inside with a bar, you should not be able to rotate the P.D. clutch if the splines are good. Good splines would rotate the engine. Bad splines will spin the clutch assembly pretty easily. |
Posted By: Lynn Marshall
Date Posted: 01 Jan 2025 at 11:57am
| I worked on an 8030 once that wouldn't move. It had a differential problem and would only move with the diff lock applied. I think that it dropped the spiders pin. I wouldn't suspect any problem there on an 8070. I believe that the power director splines are gone on yours. |
Posted By: lentsch
Date Posted: 01 Jan 2025 at 2:27pm
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I appreciate all the help from everyone and I'll let you know what I find when I tear into it. Happy New Year! ------------- WD,D15,190XT,7000,8010x2,7060,8070 |