I hope you don't mind I chose to answer this on the reflector Jeff.
The web page showing my work was updated around 7:00 PM tonight.
This covers the disassembly of the output gear case on the old style PST-61.
I have not gotten to the reassembly or the protection of the top seal yet.
> I just came across your thread on the problem you are having with your
> PST61. I have a PST-61D which I plan on putting up soon, and I
I believe this is the newer model with the DC motor? Mine is the older,
green model with the AC motor.
> wonder if there is a prevention fix for the problem you have encountered?
> I bought my rotor new from Jay, and before I put it up, I'd like to do
> whatever it takes to keep the water out.
Look at the top of the rotator where the shaft comes out. Is there a recess
where water will collect against the top seal? If so I'd just use some
rubber or plastic afixed to the output shaft that will shield the top of the
rotator so water can't get in there.
> The one thing I noticed, when I took the end off the motor section, (where
> the cable connections are located) there was lots of air space, and no
> drain holes on the bottom of the can to allow the condensation to get out.
> I would think that there would be a build-up of moisture
In mine the motor is well ventilated so it's unlikely water would collect in
there. I also had to mount the AC motor horizontally to get the rotator to
fit inside the ROHN 45G.
> inside the motor can. I am thinking of drilling a couple of small holes
> on the bottom, like you would see on the bottom of a tribander antenna's
> traps. Any comments?
If the motor is vented I'd not think this would be necessary. In any case
I'd not drill any holes or do any modifications without first running them
> How about putting together a webpage showing the whole PST-61 problem,
Over all I don't think there is much of a problem with the exception of the
top seal on the "old" rotators. I've not heard of any on the newer ones. I
am writting up what I have done to aid others in working on the rotators.
> and then the appropriate fix. I am sure there are others that would like
> to see the whole story.
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com (Use return address from here)
> Thanks for any help you can give me.
> Jeff, K3DUA
> On Jul 25, 2006, at 9:37 PM, K8RI on TowerTalk wrote:
>>> The distributor (Jay) has been very helpful in getting this thing apart.
>>> I've now reached the point where it's time for a hydraulic press to get
>>> shaft out of the gear and the top bearing off. IF I don't brake
>>> the only parts needed will be the two bearings and oil seals.
>>> That big bronze gear appears to have been cast onto the steel inner
>>> As the bronze gear is thicker than the support it means supporting the
>>> flange rather than the brass when pressing out the shaft. The whole
>>> has been soaking in PB blaster for the last two days.
>> We split a bearing race and used it to support the steel inner part of
>> worm gear wheel. The shaft pressed out easily. It did take a bit more
>> to get the inner race for the top bearing off, but it still was no big
>> OTOH The sealing surface for the upper oil seal is pretty well shot. The
>> surface for the bottom seal is a bit rough but I think that could be
>> salvaged. Still I have to be able to use both ends of the gear.
>>> If any one is interested AND has a high speed internet connection there
>>> three LARGE high resolution photos of the insides at
>> There are now five and I have reduced the size to 100K per file, give or
>> take a tad. I added two that show the upper and lower sealing surfaces.
>> There's a bit more information at the bottom of my tower project page
>> Roger Halstead (K8RI and ARRL 40 year Life Member)
>> N833R - World's oldest Debonair CD-2
>> www.rogerhalstead.com (Use return address from here)
>>> BTW my address has changed and the only accepted sender to this one is
>>> reflector. Direct replies/e-mails should go to an address on my home
>>> Sorry about the round about method, but the old address here was getting
>>> more spam every day.
>>> Roger Halstead (K8RI and ARRL 40 year Life Member)
>>> N833R - World's oldest Debonair CD-2
>>> TowerTalk mailing list
>> TowerTalk mailing list
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