开云体育

From: "Ed Breya via Groups.Io" <edbreya@...>
Sent: Aug 26, 2018 8:30 PM
To: [email protected]
Subject: Re: [TekScopes] Way OT: need to ID OEM hydraulic motor

I did consider replacing the seals, but Aquamatic doesn't offer any repair/rebuild kits. Until I can ID the motor, that's not an option. I have seen lots of seal kits on line for other motors, so it is likely possible on this one too. BTW I mis-wrote some of the motor info earlier, from memory. The Aquamatic part numbers are 404H for their "#8" motor, which is what I need, and 405H for their larger "#10" one. It turns out that many of the drive part numbers are of the form 4XXH, so there's probably no special significance relating to the motor ID. Maybe the #8 and #10 are important - like if they represent approximate displacement in cubic inches, they'd be in the right ballpark.

Ed

I did consider replacing the seals, but Aquamatic doesn't offer any repair/rebuild kits. Until I can ID the motor, that's not an option. I have seen lots of seal kits on line for other motors, so it is likely possible on this one too. BTW I mis-wrote some of the motor info earlier, from memory. The Aquamatic part numbers are 404H for their "#8" motor, which is what I need, and 405H for their larger "#10" one. It turns out that many of the drive part numbers are of the form 4XXH, so there's probably no special significance relating to the motor ID. Maybe the #8 and #10 are important - like if they represent approximate displacement in cubic inches, they'd be in the right ballpark.

Ed

Thought I'd mix it up a little with this project. Today I will likely be working again on our hydraulically operated pool cover system. It has two identical motors - one runs the large roller that the cover winds up on, and the other runs the track rope pulley and pulling system. The main cover one has blown its shaft seal, so oil just gushes out when pressurized. It does still operate, but loses a lot of oil on each cycle in either direction. It has been leaking for some time, but I only recently discovered where from, since this all is normally out of sight in the covered pit.

The cover system is an Aquamatic brand Hydramatic model in-ground type. I found in my records the info on the unit, and that it has a twenty year warranty on the drive mechanism - it will be twenty years in September! I called them to see about warranty and parts, but they are booked up into October, and I'd have to pay for a service call for them to "determine" what caused the failure, then decide if they will honor the warranty.

In the meantime, my wife wants to use the pool, and we have relatives visiting next week. So, I've been weighing my options on getting this thing going again. It's easiest to work on with the cover closed, so very little weight on the roller that would have to be unhooked from the motor. In this case the pool can't be used unless I can quickly get it back in service - even putting the old motor back temporarily. Leaving the pool open allows use, but then the entire weight on the roller will make it trickier to support and align afterward.

Fortunately, the company is actually nearby, and has any part necessary in stock, so I can get the new motor in a day, but the price is rather high, at $675, for what's probably a common OEM $200 part. If I go this route, I may just buy it and try to get them to reimburse it under the warranty, and have it working fairly soon.

The other option is to find a readily available equivalent one, but the trick is to ID it. Tomorrow I'll see if they can tell me what the generic OEM number is. Their part number is simply "H4" for this size, and "H5" for the bigger one in larger cover units - that's all they need. The H4 designation actually seems to be recognizable on line for certain series of motors, but not specific enough to narrow down to one, regardless of the brand.

Presuming I can get it out today, I'd like to ID it if possible. I'll be able to make some measurements and take pictures. I'm hoping to find a label, but nothing is visible or can be felt on either motor while in place. Even if there were any labels, they could have disintegrated long ago in the rough conditions in the pit. From the measurements I can narrow it down to the right standardized frame size, shaft, and fittings, but the displacement is unknown, without fancier experiments. The two motors have to match because they are hydraulically linked to synchronize the cover and ropes. It may be easier and cheaper to just get two of the same OEMs and replace both. The hydraulic demand is modest, running only a few hundred PSI tops.

So anyway, does anyone happen to be familiar with these covers, and know what OEM/generic type numbers the motors may be? The ideal answer is of course, something like "no problem Ed, it's blah blah blah made by so and so, and here's where you can get it for $150 with free overnight shipping:..." But, I'd appreciate any info that can help solve this puzzle. Please contact me off-list at the usual edbreya aaatt yahoo ddott com.

Ed

-----Original Message-----
From: Jerry Ingordo
Sent: Sunday, August 26, 2018 10:59 AM
Subject: [TekScopes] Tektronix 575 175 Curve Tracer Manual updated.

I have uploaded to ebaman.com a revised scan of the Tektronix 575 & 175
Transistor Curve Tracer. The scan is based on my old BAMA file but has
updated changes section and hi resolution color schematics. As time
permits I'm going to revisit my old BAMA scans and update the schematics
to hi resolution color. As usual you have to login to download. Login is
simple create a name and password and your in. There may be a waiting
period to download. Here is a link.


Equipment/Tektronix/Scopes/5XX-Series/Tek-575--and--175-Revised.pdf/

For what its worth some of the BAMA scans are twenty years old now and
back then file size was an issue which meant color and higher resolution
was not allowed. .

Enjoy.
Jerry
W2JI

-----Original Message-----
From: n4buq
Sent: Sunday, August 26, 2018 11:08 AM
Subject: [TekScopes] Obligatory member email

Long time member of Tekscopes but, for some reason, my account did not
migrate to groups.io so I need to post a message to get out of the
moderated box. So here I am, posting a message. Sorry for the bandwidth
but I don't have anything to ask for or contribute to at this time.

Thanks,
Barry - N4BUQ

Hi Jim,

I scrapped a couple of 7603s a while ago and still have the rear
interface panels (with connectors), which you’re welcome to. I’m in
Scotland, where are you?

Cheers,
Mel

--
you can never have enough oscilloscopes, DMMs, valve testers or
soldering irons . . .

I have uploaded to ebaman.com a revised scan of the Tektronix 575 & 175 Transistor Curve Tracer. The scan is based on my old BAMA file but has updated changes section and hi resolution color schematics.
Enjoy.
Jerry
W2JI

On Aug 26, 2018, at 7:33 AM, Vintage Test via Groups.Io <mel.purcell@...> wrote:


I scrapped a couple of 7603s a while ago and think I probably have the HT modules in my spares bin. Let me confirm this and I’ll contact you tomorrow.

Cheers,
Mel
--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .

My apologies, Chuck. Consider the behavior corrected.

-Stefan

My 310A has serial number 015467 and was made for or customized for IBM (I think this mostly meant that some special accessories were made available; mine came with a leather carrying case and a probe selector).

What does the zero in the S/N mean as far as here it was built? I might assume that "0" indicates Beaverton.

Also, where do y'all get the information about serial number dating? From the service manual?

Thanks

DaveD


On 8/26/2018 5:31 AM, David C. Partridge wrote:

Yes, Guernsey plant serial numbers start with a 1

Dave

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Vincent Trouilliez
Sent: 26 August 2018 03:52
To: [email protected]
Subject: [TekScopes] 310A scope : serial number oddity ? Ideas ?

Hi Gents,

So is the leading " 1 " a valid plant number ?

Yes, Guernsey plant serial numbers start with a 1

Dave

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Vincent Trouilliez
Sent: 26 August 2018 03:52
To: [email protected]
Subject: [TekScopes] 310A scope : serial number oddity ? Ideas ?

Hi Gents,

So is the leading " 1 " a valid plant number ?