New 7040 has clutch issues.
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=202989
Printed Date: 18 Sep 2024 at 10:12am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: New 7040 has clutch issues.
Posted By: Mattman
Subject: New 7040 has clutch issues.
Date Posted: 01 Sep 2024 at 9:28pm
 Added another 7040 to the Allis collection this week. I picked it up from an auction in Iowa. I did a lot of work already. I fixed a cracked dash. I replaced range cable. I brazed hole in radiator. Its in nice shape but clutch has little to no resistance. I can push it to the floor with 2 fingers. It doesn't seem to be slipping. Trans brake works well. Its just too soft. Linkage all looks ok too. Not sure if I have a hydraulic problem or a worn out clutch. Any ideas?
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Replies:
Posted By: DougG
Date Posted: 01 Sep 2024 at 10:40pm
| Run it- does it slip then ? Open it up,, you will find the problem |
Posted By: JPG AUSTRALIA
Date Posted: 02 Sep 2024 at 6:07am
| Broken return spring on pedal |
Posted By: DrAllis
Date Posted: 02 Sep 2024 at 7:06am
| You didn't say, but it is a Power Shift transmission and the clutch pedal return spring is broken inside the instrument panel area. |
Posted By: Lynn Marshall
Date Posted: 02 Sep 2024 at 7:40am
 I don't see a gear shift lever or a transmission filter in the picture, so I'm going to assume that it's a power shift also. Usually, if the spring breaks, the pedal won't return upwards. I wonder if someone with a weak leg has replaced the original spring with a lot lighter one.
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Posted By: Mattman
Date Posted: 02 Sep 2024 at 7:54am
| The pedal returns as it should and the spring is not broke. This is a power shift transmission. |
Posted By: DrAllis
Date Posted: 02 Sep 2024 at 8:09am
| So, if the inching pedal returns 100% fully, there is no problem. Power Shift transmission inching pedals push easy compared to a Power Director. I'll bet it had a broken spring at one time and what was used to replace it is probably a little weaker than OEM. Again, if the pedal comes 100% fully UP, there is not a problem. Carry on. |
Posted By: DougG
Date Posted: 02 Sep 2024 at 8:21am
| I like that chick on the right of that pic Lynn,, |
Posted By: Lynn Marshall
Date Posted: 02 Sep 2024 at 8:26am
| The power shift tractors don't use a clutch cable like the power director tractors. The cables can get stiff and stretch over time on those models. It is just a rod and mechanical linkage to move a spool in and out of a valve body, on a power shift. Neither model uses a dry clutch with a pressure plate, release fingers, or throw out bearing. |
Posted By: Mattman
Date Posted: 09 Sep 2024 at 7:20pm
| So I figured out my light clutch issue. Previous owner had a power Director spring instead of heavier spring and link installed. I have all the correct stuff on it now and the clutch feels good. I found the pin on the floor for the power shift linkage. I am assuming it was a mixup at the service counter years ago. Thanks again. |