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Type of fitting / threads for power level control valve [message #351219]

Sat, 04 January 2020 11:43

uprooted

Messages: 72
Registered: December 2019
Location: Hilliard, OH

Karma: 0

Member

I am rebuilding one of the power level control valves. Turns out nothing was wrong with it, it had just been hooked up wrong (lines on the wrong ports). One of the previous owners had replaced the 3 small fitting on the back of that valve with plastic ones that are now stripped. I am trying to re-create the fitting using fitting found at the hardware store. I am close but can't figure out exactly what kind of threads are in the 3 holes in the back of the control valve. 1/8" MIP is VERY close but only goes in about 1.5 full turns by hand. Seems like pushing it further would be a bad idea

Thanks in advance

Corey P / Hilliard, OH / 1974 Glacier 26' / 3.70 FD / ION Wheels

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Re: Type of fitting / threads for power level control valve [message #351224 is a reply to message #351219]

Sat, 04 January 2020 13:08

jhbridges

Messages: 8412
Registered: May 2011
Location: Braselton ga

Karma: -74

Senior Member

Get a set of J.R. Slaten's Power Level II valves, and replace the OEM, and have no further problems with valves.

--johnny

Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell

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Re: [GMCnet] Type of fitting / threads for power level control valve [message #351226 is a reply to message #351224]

Sat, 04 January 2020 13:28

James Hupy

Messages: 6806
Registered: May 2010

Karma: -62

Senior Member

The original power valves with the dash mounted round knobs are similar in
function to the original clearance lights on the front and rear of the
coach. That is to say that they both are a poor design, and a leak looking
for a place to happen
. J.R. Slaten valves are a big improvement over those round knob wonders.
(you wonder when they are going to leak some more) If I were in your shoes,
I would swap them out and forget about the valves leaking. All those hoses
should be enough to keep you busy chasing leaks.
Jim Hupy
Salem, Oregon

On Sat, Jan 4, 2020, 11:09 AM Johnny Bridges via Gmclist <
gmclist@list.gmcnet.org> wrote:

> Get a set of J.R. Slaten's Power Level II valves, and replace the OEM, and
> have no further problems with valves.
>
> --johnny
> --
> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> I forgive them all, save those who hurt the dogs. They must answer to me
> in hell
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Re: Type of fitting / threads for power level control valve [message #351228 is a reply to message #351219]

Sat, 04 January 2020 18:12

uprooted

Messages: 72
Registered: December 2019
Location: Hilliard, OH

Karma: 0

Member

Yes I likely will replace the valves at some point and I'm aware there are replacements out there. For the time being I cannot put the valve back on due to the plastic ones being stripped. Does anyone know what type of threads are in the back of the valves? I believe I have an opportunity to spend only $10-$20 just to get the thing functioning properly so I can move the coach and see how the rest of the system is functioning

Corey P / Hilliard, OH / 1974 Glacier 26' / 3.70 FD / ION Wheels

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Re: [GMCnet] Type of fitting / threads for power level control valve [message #351229 is a reply to message #351228]

Sat, 04 January 2020 18:24

James Hupy

Messages: 6806
Registered: May 2010

Karma: -62

Senior Member

If that is all you are interested in doing, just go to your local Ace
Hardware and buy 2 Schrader valves. They are cheap. Screw them into your
air bags and inflate them to 90 psi or so. Measure your ride height. Either
inflate or deflate to get the ride height correct, put the valve caps on
and leave that other stuff alone until you are prepared to go end to end
with your system.
Jim Hupy
Salem, Oregon

On Sat, Jan 4, 2020, 4:13 PM Corey via Gmclist
wrote:

> Yes I likely will replace the valves at some point and I'm aware there are
> replacements out there. For the time being I cannot put the valve back on
> due to the plastic ones being stripped. Does anyone know what type of
> threads are in the back of the valves? I believe I have an opportunity to
> spend
> only $10-$20 just to get the thing functioning properly so I can move the
> coach and see how the rest of the system is functioning
> --
> Corey P /
>
> Hilliard, OH /
>
> 1974 Glacier 26'
>
> ION Wheels
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Re: [GMCnet] Type of fitting / threads for power level control valve [message #351230 is a reply to message #351229]

Sat, 04 January 2020 19:27

Hal StClair

Messages: 971
Registered: March 2013
Location: Rio Rancho NM

Karma: -12

Senior Member

Are you certain they aren't 1/8 pipe? The ones I have here are. Maybe the PO buggered the threads up a bit? Try running a 1/8 27 NPT tap through it. Good luck, Hal

"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane." 1977 Royale 101348, 1977 Royale 101586, Diesel powered, 1974 Eagle Bus 45',w/slideout, Rio Rancho, NM

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Re: [GMCnet] Type of fitting / threads for power level control valve [message #351232 is a reply to message #351230]

Sat, 04 January 2020 21:48

Jp Benson

Messages: 649
Registered: October 2011
Location: Fla

Karma: 2

Senior Member

OE Power Level uses 1/8" NPT. Use a brass compression fitting on the 1/4" plastic tube.

JP

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Re: [GMCnet] Type of fitting / threads for power level control valve [message #351233 is a reply to message #351230]

Sat, 04 January 2020 22:53

jimk

Messages: 6734
Registered: July 2006
Location: Belmont, CA

Karma: 9

Senior Member

Hal is right, I checked it out with our inventory.

On Sat, Jan 4, 2020 at 5:28 PM Hal StClair via Gmclist <
gmclist@list.gmcnet.org> wrote:

> Are you certain they aren't 1/8 pipe? The ones I have here are. Maybe the
> PO buggered the threads up a bit? Try running a 1/8 27 NPT tap through it.
> Good luck, Hal
> --
> 1977 Royale 101348,
>
> 1977 Royale 101586, Diesel powered,
>
> 1975 Eleganza II, 101230,
>
> 1974 Eagle Bus 45',w/slideout,
>
> Rio Rancho, NM
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502

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Re: Type of fitting / threads for power level control valve [message #351237 is a reply to message #351219]

Sun, 05 January 2020 07:45

C Boyd

Messages: 2629
Registered: April 2006

Karma: 18

Senior Member

Sir, just a personal note.. lately I have had an issue with quality control on a lot of stuff and brass fittings is on the list. About 90% or more I have bought at box store have leaked. When replacing airline fittings I would recommend getting DOT certified fittings. They do cost more but usually don't leak. I also Advise to use thread sealer on the tapered pipe threads and do not gorilla tighten as the brass can and will crack aluminum or pot metal housings. When using tapered threads especially with sealant on threads from supplier a turn and a half by hand is probably about normal.

uprooted wrote on Sat, 04 January 2020 12:43

I am rebuilding one of the power level control valves. Turns out nothing was wrong with it, it had just been hooked up wrong (lines on the wrong ports). One of the previous owners had replaced the 3 small fitting on the back of that valve with plastic ones that are now stripped. I am trying to re-create the fitting using fitting found at the hardware store. I am close but can't figure out exactly what kind of threads are in the 3 holes in the back of the control valve. 1/8" MIP is VERY close but only goes in about 1.5 full turns by hand. Seems like pushing it further would be a bad idea

Thanks in advance

C. Boyd
76 Crestmont
East Tennessee

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Re: Type of fitting / threads for power level control valve [message #351238 is a reply to message #351219]

Sun, 05 January 2020 08:57

uprooted

Messages: 72
Registered: December 2019
Location: Hilliard, OH

Karma: 0

Member

Thanks all for the replies. I will see if I can find DOT fittings that are intended for this use. Otherwise may replace the valves altogether.

Corey P / Hilliard, OH / 1974 Glacier 26' / 3.70 FD / ION Wheels

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Re: Type of fitting / threads for power level control valve [message #351242 is a reply to message #351238]

Sun, 05 January 2020 11:34

Melbo

Messages: 144
Registered: August 2018
Location: Albuquerque NM

Karma: 0

Senior Member

DOT fitting are readily available at any trucking company that supplies parts for air brakes. The supply houses are thick as flies near any interstate that runs through a city. They are not expensive and are easy to work with. I try to avoid the push in connectors but even some of those are DOT rated.

HTH

Melbo

Albuquerque NM Bus Conversion 1978 MCI 1973 GMC

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Re: [GMCnet] Type of fitting / threads for power level control valve [message #351245 is a reply to message #351238]

Sun, 05 January 2020 13:59

sgltrac

Messages: 2797
Registered: April 2011

Karma: 1

Senior Member

Sixrobblees is your friend here. Google them.
Sully
Bellevue wa.

On Sun, Jan 5, 2020 at 6:58 AM Corey via Gmclist
wrote:

> Thanks all for the replies. I will see if I can find DOT fittings that are
> intended for this use. Otherwise may replace the valves altogether.
> --
> Corey P /
>
> Hilliard, OH /
>
> 1974 Glacier 26'
>
> ION Wheels
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully 77 Royale basket case. Future motorhome land speed record holder(bucket list) Seattle, Wa.

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Re: Type of fitting / threads for power level control valve [message #351251 is a reply to message #351238]

Sun, 05 January 2020 18:33

GMC Cruse

Messages: 606
Registered: June 2009
Location: SE Michigan

Karma: 3

Senior Member

uprooted wrote on Sun, 05 January 2020 09:57

Thanks all for the replies. I will see if I can find DOT fittings that are intended for this use. Otherwise may replace the valves altogether.

Try Heath Packing and Rubber near you, they are a "Parker Store"

Mike K. '75 PB Southeast Michigan

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