[AT] D17 Power Director Drops out of High Range

[carl gogol]

Will-
I don't think that what gear you are in is effecting how often the power 
director pops out of high range.  Having said that, I do think that the 
speed of the tractor and bumps might  make a difference. The Power Director 
relies on an "over center" mechanism to lock things in either high or low 
range.  If your clutch packs are significantly worn, the tension in the 
mechanism from going "over center" is not very high - you probably can 
notice a significant difference from a new or properly adjusted one compared 
to yours.  I would estimate that it takes about 40 pounds of force to lock 
"the big stick" in either range when properly adjusted.  If this locking 
force is not very high, a good jar over a bump can produce enough force to 
disengage the clutch pack.  On my first D-14 the wear was mostly on the low 
range pack, your habits or the habits of the previous owner may have led to 
more wear on the high range pack.
It is not too hard to make the adjustments to the clutch packs if wear is 
the problem.  The shims and gasket are still available, there are special 
shims that are used and you have to remove one type and replace them with 
the other type to keep the overall thickness of the shims the same.  It is 
also a good time to replace the o-rings on the big stick's shaft and clean 
up one source of oil leaks on the tractor at the same time.  It takes a 
little patience to measure the clutch wear and a small internal micrometer. 
If you need the procedure I can send it to you and tell you the required 
range of micrometer to do the job.  It is quite small if I remember 
correctly.
Carl Gogol
Manlius, NY
(2) AC D-14, AC 914H
Simplicity 3112 & 7116
Kubota F-2400
----- Original Message ----- 
From: "Will Powell" <william.neff.powell at comcast.net>
To: "'Antique tractor email discussion group'" 
<at at lists.antique-tractor.com>
Sent: Sunday, May 01, 2005 10:43 AM
Subject: [AT] D17 Power Director Drops out of High Range


> Hello;
>
>
> I have two D17's in my family that have the same problem. One is an early
> D17, Serial in the 3000's. The other D17 is a Series IV.
>
> The power director lever will drop out of high, especially in high gear.
>
> Any suggestions on how to fix this problem?
>
>
>
> Regards;
>
> Will Powell
> Pottstown, PA
>
>
>
>
>
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