Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 30-06-2014, 17:58   #1
Registered User

Join Date: Dec 2009
Location: aboard Akka, currently in San Francisco Bay
Boat: Stevens Custom 50
Posts: 70
Shrader Valves in Refrigeration System

My system was originally built for R12 refrigerant and still has the original fittings for attaching hoses, though I long ago converted to R134a. My problem is that I've got a malfunctioning Shrader valve and can't unscrew it to replace it. I recovered the gas, so I only need to unscrew the valve core. I own 5 separate tools intended for this purpose, but three of them are plastic and won't take the torque I need to unscrew the core, while two of them are the same size as the outside threads on the Shrader fittings so they don't fit inside the threads in the port. The best thing, I think, would be a tool with a screwdriver handle and a split end, wide enough to bridge the Shrader core but narrow enough to fit inside the port. Also, strong enough to remove the stuck fitting. Is there such a tool? If so, how do I specify the size I need, and where can I get it?
__________________

__________________
Akka is offline   Reply With Quote
Old 30-06-2014, 18:05   #2
Guy
Registered User

Join Date: Feb 2013
Location: So. Oregon, USA
Boat: Seafarer36c
Posts: 4,308
Re: Shrader valves in refrigeration system

Truflate Plews makes that exact tool.
__________________

__________________
Guy is offline   Reply With Quote
Old 30-06-2014, 20:37   #3
Senior Cruiser
 
bstreep's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: San Antonio, TX/Port Aransas, TX
Boat: 1990 Macintosh 47, "Merlin"
Posts: 2,274
Re: Shrader valves in refrigeration system

Tire professionals have these.
__________________
Bill Streep
San Antonio/Port Aransas, TX
bstreep is offline   Reply With Quote
Old 30-06-2014, 20:47   #4
Marine Service Provider
 
Scott Berg's Avatar

Join Date: Jul 2011
Location: Aboard
Boat: Seaton 60' Ketch
Posts: 959
Re: Shrader valves in refrigeration system

HVAC shops sell 'lock' style tools that permit removal and replacement of shrader valves without evacuating the systems as well as the more common tools; either should do this for you; make sure that you get a good vacuum with 134a before recharging...
__________________
Scott Berg
WAĜLSS
SV CHARDONNAY
Scott Berg is offline   Reply With Quote
Old 30-06-2014, 20:54   #5
Registered User

Join Date: May 2008
Location: daytona beach florida
Boat: csy 37
Posts: 2,844
Images: 1
Re: Shrader valves in refrigeration system

Go to any auto parts store, tire repair section. Cost just a couple of dollars. Might even find one in a bicycle shop...

Sent from my GT-P3113 using Cruisers Sailing Forum mobile app
__________________
Take two at low eight
onestepcsy37 is offline   Reply With Quote
Old 30-06-2014, 20:54   #6
Senior Cruiser
 
bstreep's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: San Antonio, TX/Port Aransas, TX
Boat: 1990 Macintosh 47, "Merlin"
Posts: 2,274
Re: Shrader valves in refrigeration system

Scott makes a good point. You can also look on youtube for videos about replacing them without losing refrigerant.

Also, if you are interested, you can take the online course and test, and get EPA certified to do your own work on your boat (or for hire, 5 pounds of refrigerant or less), for $25. I did.
__________________
Bill Streep
San Antonio/Port Aransas, TX
bstreep is offline   Reply With Quote
Old 23-07-2014, 08:58   #7
Registered User

Join Date: Oct 2009
Location: Redondo Beach, CA
Boat: 1990 Oyster 55
Posts: 287
Quote:
Originally Posted by bstreep View Post
Scott makes a good point. You can also look on youtube for videos about replacing them without losing refrigerant.

Also, if you are interested, you can take the online course and test, and get EPA certified to do your own work on your boat (or for hire, 5 pounds of refrigerant or less), for $25. I did.
Which license did you get? Which service did you go with?
__________________
botanybay is offline   Reply With Quote
Old 23-07-2014, 09:16   #8
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,057
Re: Shrader valves in refrigeration system

I'm licensed for HVAC, I think License says high pressure or something, don't remember any refrigerant weight limit. Only time I have ever had to show it was to buy refrigerant, but 134a you can buy over the counter, why would you need a license?
__________________
a64pilot is offline   Reply With Quote
Old 26-07-2014, 11:10   #9
Registered User

Join Date: Oct 2009
Location: Redondo Beach, CA
Boat: 1990 Oyster 55
Posts: 287
Re: Shrader valves in refrigeration system

Quote:
Originally Posted by bstreep View Post
Scott makes a good point. You can also look on youtube for videos about replacing them without losing refrigerant.

Also, if you are interested, you can take the online course and test, and get EPA certified to do your own work on your boat (or for hire, 5 pounds of refrigerant or less), for $25. I did.
I have the 608 Type 1 license for small equipment. What I am trying to determine if is there is an advantage in also having the 609 (Motor Vehicle servicing license) in addition.

It appears you can work on cars (so long as you are working on your own car or working on someone else's without any form of compensation) without a license.

I am curious if there is some benefit to having both licenses or the 608 Type 2 , Type 3, or universal. Being that I just want to work on the systems on my own boat I can't see any reason I would need anything else.

Am I missing something.
__________________
botanybay is offline   Reply With Quote
Old 26-07-2014, 11:14   #10
Registered User

Join Date: Oct 2009
Location: Redondo Beach, CA
Boat: 1990 Oyster 55
Posts: 287
Re: Shrader Valves in Refrigeration System

Quote:
Originally Posted by Akka View Post
My system was originally built for R12 refrigerant and still has the original fittings for attaching hoses, though I long ago converted to R134a. My problem is that I've got a malfunctioning Shrader valve and can't unscrew it to replace it. I recovered the gas, so I only need to unscrew the valve core. I own 5 separate tools intended for this purpose, but three of them are plastic and won't take the torque I need to unscrew the core, while two of them are the same size as the outside threads on the Shrader fittings so they don't fit inside the threads in the port. The best thing, I think, would be a tool with a screwdriver handle and a split end, wide enough to bridge the Shrader core but narrow enough to fit inside the port. Also, strong enough to remove the stuck fitting. Is there such a tool? If so, how do I specify the size I need, and where can I get it?
What kind of system is it? A rotary compressor or a hermetic compressor. If a large hermetic compressor (say 1/2 hp) I would be curious about if you have had long term success.
__________________

__________________
botanybay is offline   Reply With Quote
Reply

Tags
refrigeration

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Check Valves in Fresh Water System geoffr Plumbing Systems and Fixtures 2 04-04-2011 10:29
Stainless steel valves or Marelon valves? David M Construction, Maintenance & Refit 11 10-12-2008 02:28



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:08.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.