Allis d15 power director repair/adjustments
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=205784
Printed Date: 12 Mar 2025 at 7:52am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis d15 power director repair/adjustments
Posted By: 1950AllisWD
Subject: Allis d15 power director repair/adjustments
Date Posted: 09 Mar 2025 at 4:56pm
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I'm getting into the power director on my d15. Figured while it was split I would go through it and verify it's adjusted correctly. I haven't had a ton of issues with the PD popping out of gear. It has popped out of the high side on occasion but only when it's really cold and the PD compartment was way over full with oil caused by bad clutch shaft seals. Going off the measurements called out in the service manual I would guess the clutch packs don't have a ton of life left in them? The manual states the shim stack should start with a .085" stack on the low side, .085" stack on the high side and a .035" stack in the middle, equaling out to .205" total. The current stack is .058" on the low side, .062" on the high and .067" in the middle, equaling .187". .018" shy of the required .205". The difference between the engaged and disengage measurements between the preload and pressure plates is .022" on the low side and .033" on the high side. Manual calls for .042"-.046". Do I pull shims from the outsides and install shims in the middle to bring those number up to where they need to be? Or am I looking at replacing the clutch disc's? The high side discs have also worn into the rear clutch hub splines pretty bad. There is also some wear on the detents in the preload plates. Could this be the reason for the smaller overall shim stack thickness? Just looking for some advice on what direction to go with this.     
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Replies:
Posted By: DrAllis
Date Posted: 09 Mar 2025 at 5:12pm
| Some ignorant individual has been working on it !! The grand total of .205" MUST BE MAINTAINED !!! This insures full stroke on the hand lever and 100% release and 100% full engagement of both clutches. LONG shims only must be used in the center. SHORT shims only must be used in the other two locations. Your two ramp plates where the rollers operate are SHOT and this causes jump out. The two drive hubs where notches are carved into the hub teeth are junk. The driving discs teeth are badly worn. Personally, I have never seen a Power Director clutch in as terrible of shape as this one is. I wouldn't fix it. Find a good USED one and get on with life. |
Posted By: 1950AllisWD
Date Posted: 09 Mar 2025 at 5:15pm
| Thanks for the reply. I was kind of afraid of that. Looks like the last guy in there was just doing whatever it took to limp it along. |
Posted By: Lynn Marshall
Date Posted: 09 Mar 2025 at 9:54pm
| I would agree with the overall condition of that clutch assembly. I would certainly hope that there are better ones available in salvage yards, or forum members. |
Posted By: 1950AllisWD
Date Posted: 09 Mar 2025 at 11:44pm
| It looks like a d17 powerdirector shares some of the same components with a d15. Looks like the clutch disc's are the same along with the preload plates. Would the shims and drive hubs interchange as well? |
Posted By: 1950AllisWD
Date Posted: 09 Mar 2025 at 11:50pm
A screenshot of an older post on a d17 power director repair.
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Posted By: IBWD MIke
Date Posted: 10 Mar 2025 at 6:22am
| There were 3 D-15 power directors on a hayrack at the auction I went to Saturday. Bad timing I guess. Didn't even watch them sell. |
Posted By: DrAllis
Date Posted: 10 Mar 2025 at 6:26am
| Any D-17 PD clutch is 4 discs in low range (front) and 3 discs in high range (rear). So a good many of the parts are the same except when it comes to anything related to the front clutch section. So, the hub is wrong and any of the long linkage parts and small return springs and maybe the front housing itself. Discs and plates and shims all interchange. The ramp plates are normally the only parts that get replaced for jump out issues. Maybe the rollers too. D-14 and D-15 clutches are identical. |
Posted By: 1950AllisWD
Date Posted: 10 Mar 2025 at 9:53am
| Are both ramp plates on the d17 clutch the same? |
Posted By: DrAllis
Date Posted: 10 Mar 2025 at 9:55am
| Yes. What I call the ramp plate is the plate that the roller levers roll thru the pockets to engage the clutch. |
Posted By: 1950AllisWD
Date Posted: 10 Mar 2025 at 4:14pm
| So a d17 PD would also be a viable option for ramp plates and a rear drive hub. I'll have to see what I can round up. |
Posted By: Mikez
Date Posted: 10 Mar 2025 at 7:55pm
| Get yourself parts books and compare part numbers |
Posted By: 1950AllisWD
Date Posted: 11 Mar 2025 at 11:26am
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Looks like the part number for the two ramp plates on the d15 clutch is 0230015. The rear clutch hub is 022807. Does anyone have a d17 parts Manual handy they could share a picture of? The reason I'm so interested in the d17 clutch is there is one on ebay for $100. The guy is going to send me some pictures of the rear drive hub and any wear present on the ramp plates tonight. ASAP tractor parts has ramp plates listed on there website as fitting the d14, d15, and d17. So if both ramp plates are the same in the 17 clutch then this clutch may be a good parts candidate. |
Posted By: Mikez
Date Posted: 11 Mar 2025 at 12:38pm
| Agco parts website you can view them |