| [GMCnet] Polypropylene holding tanks [message #252981] |
Sun, 22 June 2014 22:31  |
emerystora
Messages: 4442
Registered: January 2004
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In the Maintenance Manual X7425 on page 24L3 it says that the holding tank is made of polypropylene and it gives instructions for mending it.
In Maintenance Manual X7525 it says the same on page 24J7.
It is difficult to tell the difference between polyethylene and polypropylene with a flame test. The flame colors are similar.
If you scratch the surface, polyethylene is softer and will scratch easily. Polypropylene is harder and does not scratch as easily.
Any holding tanks that I have looked at over the years have all been polypropylene.
Emery Stora
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| Re: [GMCnet] Polypropylene holding tanks [message #252982 is a reply to message #252981] |
Sun, 22 June 2014 23:01  |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
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emerystora wrote on Sun, 22 June 2014 20:31In the Maintenance Manual X7425 on page 24L3 it says that the holding tank is made of polypropylene and it gives instructions for mending it.
In Maintenance Manual X7525 it says the same on page 24J7.
It is difficult to tell the difference between polyethylene and polypropylene with a flame test. The flame colors are similar.
If you scratch the surface, polyethylene is softer and will scratch easily. Polypropylene is harder and does not scratch as easily.
Any holding tanks that I have looked at over the years have all been polypropylene.
Emery Stora
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Maintenance Manual X7525 on page 24J7 refers to the water tank, not the holding tank
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: [GMCnet] Polypropylene holding tanks [message #253005 is a reply to message #252995] |
Mon, 23 June 2014 10:08 |
Dennis S
Messages: 3046
Registered: November 2005
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USAussie wrote on Mon, 23 June 2014 08:37Emery,
I am in Houston and don't have the manuals readily available; are both the black tank and water tank Polypropylene?
If yes could you send in an email with the Subject Black Tank and Water Tank material with the appropriate references for each?
Doing so will make it easy to find in the future.
Regards,
Rob M.
Adding my reply to several threads on black tank material ...
I have mentioned this before -- when I took my original black tank (1973) to the plastic tank shop I told them it was polypropylene per the manual. But they determined it was polyethylene when they welded new bungs on the top.
Dennis
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Polypropylene holding tanks [message #253047 is a reply to message #253034] |
Mon, 23 June 2014 16:48 |
James Hupy
Messages: 6806
Registered: May 2010
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Rob, how long until you start? We are in Santa Fe NM tonight, Albuquerque,
NM tomorrow night, further West along old route 66, day by day, to santa
monica, Ca. Can we hook up somewhere along the route?
Jim Hupy & the route 66 traveling circus.
On Jun 23, 2014 2:29 PM, "Rob Mueller" wrote:
> JR,
>
> Yep, I'm in Houston (Humble to be more accurate) and my flight home is
> October 14. We're planning on heading west across northern NM
> - AZ - Grand Canyon - Vegas - LA - San Diego - across southern AZ - NM -
> Humble.
>
> Not sure when as management has not advised flight dates.
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> USAussie - Downunder
> USA '75 Avion - Double Trouble TZE365V100426
> AUS '75 Avion - The Blue Streak TZE365V100428
>
> -----Original Message-----
> From: John Wright
>
> Rob,
> Are you already back in the US again in damp Houston? How long are you
> staying this time?
> JR
>
>
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| Re: [GMCnet] Polypropylene holding tanks [message #253051 is a reply to message #253034] |
Mon, 23 June 2014 18:08 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Rob,
Sorry I missed your call today. We'll talk soon.
When you go to the Grand Canyon, consider avoiding the South Rim with its
hordes of tourists. Instead, go to PIpe Spring National Monument <
http://www.nps.gov/pisp/index.htm> on the North Rim. Across the road is
what was once the "Mad Rabbit Campground", now something else (or perhaps
closed). It's an interesting historical site. When we were there in '96
we were greeted and guided by the wife of the then-assigned Ranger, who had
been born there in 1937, son to the very first NPS Ranger assigned there.
From PSNM, head south to Toroweap Overlook. It's a 53 mile (IIRC) gravel
road trip, and you may meet no one going or coming, but the road is not
nearly as bad as they make it sound here (at least not during our visit in
1996 or in 2013): We
did NOT take the GMC to the rim -- but could have. There is plenty of room
there to park, and, apparently on restrictions on doing so.
I have no desire to ever visit the South Rim again after having seen
Toroweap. Last summer, Dennis and I hit both sights in one day, but we're
"fast see-ers". :-) It's a pretty easy drive on to Zion.
Ken H.
On Mon, Jun 23, 2014 at 4:29 PM, Rob Mueller
wrote:
> JR,
>
> Yep, I'm in Houston (Humble to be more accurate) and my flight home is
> October 14. We're planning on heading west across northern NM
> - AZ - Grand Canyon - Vegas - LA - San Diego - across southern AZ - NM -
> Humble.
>
> Not sure when as management has not advised flight dates.
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Polypropylene holding tanks [message #253077 is a reply to message #253047] |
Mon, 23 June 2014 22:20 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Jim,
Unfortunately ya'll will be back home by the time Helen gets here and we leave.
I would have loved to "roll up, roll up for the Magical Route 66 Mystery Tour!"
Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
USA '75 Avion - Double Trouble TZE365V100426
AUS '75 Avion - The Blue Streak TZE365V100428
-----Original Message-----
From: James Hupy
Rob, how long until you start? We are in Santa Fe NM tonight, Albuquerque,
NM tomorrow night, further West along old route 66, day by day, to santa
monica, Ca. Can we hook up somewhere along the route?
Jim Hupy & the route 66 traveling circus.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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