Farm Equipment - 7040 power directory

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7040 power directory

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=142098
Printed Date: 04 Apr 2026 at 8:31am
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Topic: 7040 power directory

Posted By: nickia
Subject: 7040 power directory
Date Posted: 03 Sep 2017 at 2:44pm

i have a marron belly 7040 with 10,000+hrs on it. going down the road i'll pull up to stop, push in the clutch and let out no movement? i have steering i have brakes. if i hit the high side button on the floor it will jump and start moving normal. im assuming my low side of my power directory needs resealed? if thats the case is it a hard job and can a shade tree mechanic myself do this? and if so how many hrs? thanks Nick

Replies:

Posted By: Orange Blood
Date Posted: 03 Sep 2017 at 9:15pm

Have you checked pressures at the PD valve yet?

To your question...

Not terribly hard to do, IF you have the proper splitting stands, and I would highly recommend the Power Director lifting tool with hoist, or make something. Even two strong guys, it would be a bear, and you won't enjoy aligning the splines to put it back together.

As for special tools, mostly just a large press, but if you are careful you can drive out the front hub, and drive it back in, but a press makes it so much easier, and makes sure you don't damage something.

You really should have the factory service manual.

All the parts you will need are still available from AGCO

Take a long hard look at your torque limiter, now would be the time to replace.

If you do both the Power Director, and the Torque limiter, AND you have the proper tools and facilities, it can be done in two days, but that is optimal, and you have all the new parts all ready to go.

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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
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Posted By: nickia
Date Posted: 03 Sep 2017 at 9:59pm

ok thanks i was also looking at the valve that is ran by the foot buttons is there any thing that could of went wrong in the control valve? the reason i ask is that i can by playing with the tractor get it into the low side and i can stand on the brake or put a load on it and it holds it dont slip or any thing. didnt know if part of my problem could lie with the hydrolic foot valve?

Posted By: Orange Blood
Date Posted: 03 Sep 2017 at 10:08pm

That is why I asked if you have verified any pressures. It is entirely possible the problem lies in the valve.

That being said, with those kind of hours, and the age of the tractor, the PD seals are likely hard as a rock, and could use replacing, but as the old saying goes, if it aint broke???

Posted By: nickia
Date Posted: 03 Sep 2017 at 10:12pm

thank you very much

Posted By: nickia
Date Posted: 04 Sep 2017 at 4:56pm

orange blood i found a salvage yard open today i went down to purchase the power director valve ($150) i came home and started to take mine off and take a $150 dollar chance as i had both of them upside down i noticed thru the oil passage holes all the valves looked good but one, so i took my 1 1/4 wrench took off the end plug and found a spring broken in 3 places and the bottom of the poppet valve chewed up. im hoping this is my problem and debris didnt make it down to the directory. thanks for all the help. Nick