Power Level Valve Rebuild - Revision history

Bob Crisler: Bob Crisler moved page DIY Gaskets for Leak-Free Power Level Valves to Power Level Valve Rebuild: More meaningful/shorter article title

2024-01-08T05:39:29Z

Bob Crisler moved page DIY Gaskets for Leak-Free Power Level Valves to Power Level Valve Rebuild: More meaningful/shorter article title

← Older revision	Revision as of 22:39, 7 January 2024
(No difference)

40.131.134.238 at 22:48, 8 September 2022

2022-09-08T22:48:21Z

← Older revision		Revision as of 15:48, 8 September 2022
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	So I decided to take things on, starting at known failure points, focusing on the compressor -- the Dana was shot -- and replacing it with a Viair 480c (that's a different story and a different post), and the Power Level valves. I used Applied GMC's rebuild kit for those valves first, and had partial success. The new O-rings did their job of sealing, as did the valve gaskets, but the Viair is a beast, and after a few days the cork-composite valve body gaskets blew out. IMO that material is just not tough enough, resilient enough, for 120 PSI.		So I decided to take things on, starting at known failure points, focusing on the compressor -- the Dana was shot -- and replacing it with a Viair 480c (that's a different story and a different post), and the Power Level valves. I used Applied GMC's rebuild kit for those valves first, and had partial success. The new O-rings did their job of sealing, as did the valve gaskets, but the Viair is a beast, and after a few days the cork-composite valve body gaskets blew out. IMO that material is just not tough enough, resilient enough, for 120 PSI.

	I looked at JR Slaten's Power Level II valves, but before spending $500 I thought I'd take another shot at those Power Level valves, as I could easily make my own valve gaskets out of some 1/8" sheet EPDM rubber I had left over from a roofing project.		I looked at JR Slaten's Power Level II valves, based on high-quality Swagelok parts, but before spending $500 I thought I'd take another shot at those Power Level valves, as I could easily make my own valve gaskets out of some 1/8" sheet EPDM rubber I had left over from a roofing project.

	The system has now held with no discernible leakdown for ~~weeks; the compressor rarely runs~~.		After weeks now of holding air with nary a peep out of the compressor, I can report that the EPDM gaskets have successfully fixed the original valves. The system has now held with no discernible leakdown for long enough that I can say that it ''does not leak''.

	To create the valve gaskets, download the [[:File:DIY Power Level Valve Gasket.pdf\|DIY Power Level Gasket PDF]] to use as a guide.		To create the valve gaskets, download the [[:File:DIY Power Level Valve Gasket.pdf\|DIY Power Level Gasket PDF]] to use as a guide.
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	Tooling marks are considerable in these valves. You want to leave some "tooth" in the surface to assist in keeping the gasket in place. But mine were excessively scored. Light sanding may be advisable. Optionally, lightly grease both sealing surfaces with Permatex 51813 Anaerobic Gasket Maker.		Tooling marks are considerable in these valves. You want to leave some "tooth" in the surface to assist in keeping the gasket in place. But mine were excessively scored. Light sanding may be advisable. Optionally, lightly grease both sealing surfaces with Permatex 51813 Anaerobic Gasket Maker.

	Torque Torx-head bolts joining the two sides of the valve snug but don't go nuts (remember, you're holding 120 PSI).		Torque Torx-head bolts joining the two sides of the valve snug but don't go nuts (remember, you're holding 120 PSI, so "snug" means that the rubber is compressed adequately to seal against those imperfect surfaces).

	Note: Several openings in the downloadable gasket template are intentionally undersized to help the gasket retain shape and remain in place over the sealing surfaces; these openings are still larger than inside diameter of airlines, and therefore do not add any restriction.		Note: Several openings in the downloadable gasket template are intentionally undersized to help the gasket retain shape and remain in place over the sealing surfaces; these openings are still larger than inside diameter of airlines, and therefore do not add any restriction.

Bob Crisler at 23:21, 7 September 2022

2022-09-07T23:21:47Z

← Older revision		Revision as of 16:21, 7 September 2022
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	Tooling marks are considerable in these valves. You want to leave some "tooth" in the surface to assist in keeping the gasket in place. But mine were excessively scored. Light sanding may be advisable. Optionally, lightly grease both sealing surfaces with Permatex 51813 Anaerobic Gasket Maker.		Tooling marks are considerable in these valves. You want to leave some "tooth" in the surface to assist in keeping the gasket in place. But mine were excessively scored. Light sanding may be advisable. Optionally, lightly grease both sealing surfaces with Permatex 51813 Anaerobic Gasket Maker.

	Torque Torx-head bolts joining the two sides of the valve snug but don't go nuts (remember, you're holding up 120 PSI).		Torque Torx-head bolts joining the two sides of the valve snug but don't go nuts (remember, you're holding 120 PSI).

	Several openings in the downloadable gasket template are intentionally undersized to help the gasket retain shape and remain in place over the sealing surfaces; these openings are still larger than inside diameter of airlines, and therefore do not add any restriction.		Note: Several openings in the downloadable gasket template are intentionally undersized to help the gasket retain shape and remain in place over the sealing surfaces; these openings are still larger than inside diameter of airlines, and therefore do not add any restriction.

Bob Crisler at 23:20, 7 September 2022

2022-09-07T23:20:42Z

← Older revision		Revision as of 16:20, 7 September 2022
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	The system has now held with no discernible leakdown for weeks; the compressor rarely runs.		The system has now held with no discernible leakdown for weeks; the compressor rarely runs.

	To create the valve gaskets, download the [[~~Index.php?title=~~File:DIY Power Level Gasket ~~PDF~~\|DIY Power Level Gasket PDF]] to use as a guide.		To create the valve gaskets, download the [[:File:DIY Power Level Valve Gasket.pdf\|DIY Power Level Gasket PDF]] to use as a guide.

	Leather punches from [https://www.harborfreight.com/9-piece-hollow-punch-set-3838.html?utm_source=google&utm_medium=cpc&utm_campaign=17890471891&campaignid=17890471891&utm_content=146321458304&adsetid=146321458304&product=3838&store=&gclid=Cj0KCQjwguGYBhDRARIsAHgRm4-5ja62tu1i3AGsLQwuAAdnTG744KC87LEqjvk9vtIM5DdpJnlIlc4aAtaKEALw_wcB Harbor Freight] provided clean results in the process of creating the holes in the gasket. The perimeter cut can be completed after installation, with a razor blade.		Leather punches from [https://www.harborfreight.com/9-piece-hollow-punch-set-3838.html?utm_source=google&utm_medium=cpc&utm_campaign=17890471891&campaignid=17890471891&utm_content=146321458304&adsetid=146321458304&product=3838&store=&gclid=Cj0KCQjwguGYBhDRARIsAHgRm4-5ja62tu1i3AGsLQwuAAdnTG744KC87LEqjvk9vtIM5DdpJnlIlc4aAtaKEALw_wcB Harbor Freight] provided clean results in the process of creating the holes in the gasket. The perimeter cut can be completed after installation, with a razor blade.

Bob Crisler at 23:19, 7 September 2022

2022-09-07T23:19:23Z

← Older revision		Revision as of 16:19, 7 September 2022
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	The system has now held with no discernible leakdown for weeks; the compressor rarely runs.		The system has now held with no discernible leakdown for weeks; the compressor rarely runs.

	To create the valve gaskets, download the [[DIY Power Level Gasket PDF]] to use as a guide.		To create the valve gaskets, download the [[Index.php?title=File:DIY Power Level Gasket PDF\|DIY Power Level Gasket PDF]] to use as a guide.

	Leather punches from [https://www.harborfreight.com/9-piece-hollow-punch-set-3838.html?utm_source=google&utm_medium=cpc&utm_campaign=17890471891&campaignid=17890471891&utm_content=146321458304&adsetid=146321458304&product=3838&store=&gclid=Cj0KCQjwguGYBhDRARIsAHgRm4-5ja62tu1i3AGsLQwuAAdnTG744KC87LEqjvk9vtIM5DdpJnlIlc4aAtaKEALw_wcB Harbor Freight] provided clean results in the process of creating the holes in the gasket. The perimeter cut can be completed after installation, with a razor blade.		Leather punches from [https://www.harborfreight.com/9-piece-hollow-punch-set-3838.html?utm_source=google&utm_medium=cpc&utm_campaign=17890471891&campaignid=17890471891&utm_content=146321458304&adsetid=146321458304&product=3838&store=&gclid=Cj0KCQjwguGYBhDRARIsAHgRm4-5ja62tu1i3AGsLQwuAAdnTG744KC87LEqjvk9vtIM5DdpJnlIlc4aAtaKEALw_wcB Harbor Freight] provided clean results in the process of creating the holes in the gasket. The perimeter cut can be completed after installation, with a razor blade.

Bob Crisler: Added a link to the PDF

2022-09-07T23:18:21Z

Added a link to the PDF

← Older revision		Revision as of 16:18, 7 September 2022
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	The system has now held with no discernible leakdown for weeks; the compressor rarely runs.		The system has now held with no discernible leakdown for weeks; the compressor rarely runs.

	To create the valve gaskets, download the DIY Power Level Gasket PDF to use as a guide.		To create the valve gaskets, download the [[DIY Power Level Gasket PDF]] to use as a guide.

	Leather punches from [https://www.harborfreight.com/9-piece-hollow-punch-set-3838.html?utm_source=google&utm_medium=cpc&utm_campaign=17890471891&campaignid=17890471891&utm_content=146321458304&adsetid=146321458304&product=3838&store=&gclid=Cj0KCQjwguGYBhDRARIsAHgRm4-5ja62tu1i3AGsLQwuAAdnTG744KC87LEqjvk9vtIM5DdpJnlIlc4aAtaKEALw_wcB Harbor Freight] provided clean results in the process of creating the holes in the gasket. The perimeter cut can be completed after installation, with a razor blade.		Leather punches from [https://www.harborfreight.com/9-piece-hollow-punch-set-3838.html?utm_source=google&utm_medium=cpc&utm_campaign=17890471891&campaignid=17890471891&utm_content=146321458304&adsetid=146321458304&product=3838&store=&gclid=Cj0KCQjwguGYBhDRARIsAHgRm4-5ja62tu1i3AGsLQwuAAdnTG744KC87LEqjvk9vtIM5DdpJnlIlc4aAtaKEALw_wcB Harbor Freight] provided clean results in the process of creating the holes in the gasket. The perimeter cut can be completed after installation, with a razor blade.

Bob Crisler at 23:17, 7 September 2022

2022-09-07T23:17:18Z

← Older revision		Revision as of 16:17, 7 September 2022
Line 4:		Line 4:
	So I decided to take things on, starting at known failure points, focusing on the compressor -- the Dana was shot -- and replacing it with a Viair 480c (that's a different story and a different post), and the Power Level valves. I used Applied GMC's rebuild kit for those valves first, and had partial success. The new O-rings did their job of sealing, as did the valve gaskets, but the Viair is a beast, and after a few days the cork-composite valve body gaskets blew out. IMO that material is just not tough enough, resilient enough, for 120 PSI.		So I decided to take things on, starting at known failure points, focusing on the compressor -- the Dana was shot -- and replacing it with a Viair 480c (that's a different story and a different post), and the Power Level valves. I used Applied GMC's rebuild kit for those valves first, and had partial success. The new O-rings did their job of sealing, as did the valve gaskets, but the Viair is a beast, and after a few days the cork-composite valve body gaskets blew out. IMO that material is just not tough enough, resilient enough, for 120 PSI.

	I looked at JR Slaten's Power Level II valves, but before spending $500 I thought I'd take another shot at those Power Level valves, as I could make my own valve gaskets out of some 1/8" sheet EPDM rubber I had left over from a roofing project.		I looked at JR Slaten's Power Level II valves, but before spending $500 I thought I'd take another shot at those Power Level valves, as I could easily make my own valve gaskets out of some 1/8" sheet EPDM rubber I had left over from a roofing project.

	The system has now held with no discernible leakdown for weeks; the compressor rarely runs.		The system has now held with no discernible leakdown for weeks; the compressor rarely runs.

Bob Crisler: Added PDF and some inks

2022-09-07T23:16:12Z

Added PDF and some inks

← Older revision		Revision as of 16:16, 7 September 2022
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			[[File:DIY Power Level Valve Gasket.pdf\|thumb\|Printable template to aid in cutting new valve gaskets]]
	When I bought my GMC, a 1975 Palm Beach, the Power Level system was not working. The PO had installed cutoff ball valves at each rear wheel set, and leveling was achieved with an air compressor through Schrader valves located at each airbag. It was adequate for a temporary solution, but hardly ideal.		When I bought my GMC, a 1975 Palm Beach, the Power Level system was not working. The PO had installed cutoff ball valves at each rear wheel set, and leveling was achieved with an air compressor through Schrader valves located at each airbag. It was adequate for a temporary solution, but hardly ideal.

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	Additionally ...		'''Additionally ...'''
	I replaced the lines between the Power Level valves and the butt connectors in the engine compartment, cutting an additional two inches or so -- carefully, with a tool specially made for cutting airlines -- from ~~those~~ to create a new sealing surface. New Parker Prestolok butt connectors (32PLP-4) along with a Y-connector (362PLP-4) for the main air supply located immediately behind the valves were purchased, along with new color-coded 1120-series airline tubing from the valves to the butt connectors. PartsGopher.com was the best vendor I was able to find for this tubing in short lengths. I went with 4 feet per line, but 3 would be fine. I also changed the tubing connectors on the valve bodies themselves to Parker Prestolok, purchased at my local Parker Store; I'll edit this to include the model number.
			I replaced the lines between the Power Level valves and the butt connectors in the engine compartment, cutting an additional two inches or so -- carefully, with a tool specially made for cutting airlines -- from the old lines to create a new sealing surface for the O-rings in the Prestoloks. New Parker Prestolok butt connectors (32PLP-4) along with a Y-connector (362PLP-4) for the main air supply located immediately behind the valves were purchased, along with new color-coded 1120-series airline tubing from the valves to the butt connectors. [https://www.partsgopher.com/products?Filter=3312.1120-series-tubing/department.hose-fittings/product-type.tubing/outer-diameter.1-4-inch PartsGopher.com] was the best vendor I was able to find for this tubing in short lengths. I went with 4 feet per line, but 3 would be fine. I also changed the tubing connectors on the valve bodies themselves to Parker Prestolok, purchased at my local Parker Store; I'll edit this to include the model number.

Bob Crisler at 23:11, 7 September 2022

2022-09-07T23:11:15Z

← Older revision		Revision as of 16:11, 7 September 2022
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	I looked at JR Slaten's Power Level II valves, but before spending $500 I thought I'd take another shot at those Power Level valves, as I could make my own valve gaskets out of some 1/8" sheet EPDM rubber I had left over from a roofing project.		I looked at JR Slaten's Power Level II valves, but before spending $500 I thought I'd take another shot at those Power Level valves, as I could make my own valve gaskets out of some 1/8" sheet EPDM rubber I had left over from a roofing project.

	~~These have~~ now held, with no discernible leakdown, for ~~more than a week~~.		The system has now held with no discernible leakdown for weeks; the compressor rarely runs.

	To create the valve gaskets, download the DIY Power Level Gasket PDF to use as a guide.		To create the valve gaskets, download the DIY Power Level Gasket PDF to use as a guide.

Bob Crisler: Initial editing

2022-09-07T22:58:55Z

Initial editing

← Older revision		Revision as of 15:58, 7 September 2022
Line 9:		Line 9:
	To create the valve gaskets, download the DIY Power Level Gasket PDF to use as a guide.		To create the valve gaskets, download the DIY Power Level Gasket PDF to use as a guide.

	Leather punches from ~~<a href="~~https://www.harborfreight.com/9-piece-hollow-punch-set-3838.html?utm_source=google&utm_medium=cpc&utm_campaign=17890471891&campaignid=17890471891&utm_content=146321458304&adsetid=146321458304&product=3838&store=&gclid=Cj0KCQjwguGYBhDRARIsAHgRm4-5ja62tu1i3AGsLQwuAAdnTG744KC87LEqjvk9vtIM5DdpJnlIlc4aAtaKEALw_wcB">Harbor Freight~~</a>~~ provided clean results in the process of creating the holes in the gasket. The perimeter cut can be completed after		Leather punches from [https://www.harborfreight.com/9-piece-hollow-punch-set-3838.html?utm_source=google&utm_medium=cpc&utm_campaign=17890471891&campaignid=17890471891&utm_content=146321458304&adsetid=146321458304&product=3838&store=&gclid=Cj0KCQjwguGYBhDRARIsAHgRm4-5ja62tu1i3AGsLQwuAAdnTG744KC87LEqjvk9vtIM5DdpJnlIlc4aAtaKEALw_wcB Harbor Freight] provided clean results in the process of creating the holes in the gasket. The perimeter cut can be completed after installation, with a razor blade.
	installation, with a razor blade.

	Tooling marks are considerable in these valves. You want to leave some "tooth" in the surface to assist in keeping the gasket in place. But mine were excessively scored. Light sanding may be advisable. Optionally, lightly grease both sealing surfaces with Permatex 51813 Anaerobic Gasket Maker.		Tooling marks are considerable in these valves. You want to leave some "tooth" in the surface to assist in keeping the gasket in place. But mine were excessively scored. Light sanding may be advisable. Optionally, lightly grease both sealing surfaces with Permatex 51813 Anaerobic Gasket Maker.

	Torque Torx-head bolts joining the two sides snug but don't go nuts (~~this is~~ holding ~~back~~ up 120 PSI).		Torque Torx-head bolts joining the two sides of the valve snug but don't go nuts (remember, you're holding up 120 PSI).

	Several openings in the gasket template are intentionally undersized to help the gasket retain shape and remain in place over the sealing surfaces; these openings are still larger than inside diameter of airlines, and therefore do not add any restriction.		Several openings in the downloadable gasket template are intentionally undersized to help the gasket retain shape and remain in place over the sealing surfaces; these openings are still larger than inside diameter of airlines, and therefore do not add any restriction.