Results 1 to 24 of 24
Thread: Schrader valve renewal
-
15-01-2006, 08:08 PM #1
Schrader valve renewal
Hi.
Basically I have a discovered a leak after removing the schrader valve cap on the suction side of an old Toshiba R22 split.
I have a core removal tool and spare cores, just wondering what is the best way to go about repairing the valve, i.e will I have to recover before taking the core out or is there a way around it?
Thanks in advance.
-
15-01-2006, 08:22 PM #2
Re: Schrader valve renewal
You can change the valve with this tool when the system is charged. http://www.hawco.co.uk/refrig/Sectio...Section6_1.htm
Last item on the page
-
15-01-2006, 08:22 PM #3
Re: Schrader valve renewal
pump it down..
cheers
richard
-
15-01-2006, 08:46 PM #4
Re: Schrader valve renewal
Originally Posted by frank
-
15-01-2006, 08:49 PM #5
Re: Schrader valve renewal
Frank,
That looks like a very useful tool. I have not seen one of these, but then I have not had to work on any schrader valves for a long, long time.
It does seem to take all of the fun out of doing a hot change-over on a liquid line though.
Thanks for the info and heads-up on this tool.
-
15-01-2006, 08:52 PM #6
Re: Schrader valve renewal
Originally Posted by rbartlett
Apologies if there are a lot of questions, as you can prob tell I'm mainly installation!
-
15-01-2006, 09:14 PM #7
Re: Schrader valve renewal
Hi
This is a excellent tool and I use it often,its ideal when charging a pack as the shreader valve restricts the flow.You attach the tool on to the shreader threads then send the extraction rod in and remove the valve this is a sealed chamber,pull the rod back and close the shut off valve on the tool and unscrew rod and valve.
Hope that makes sense
Regards Bernard
-
15-01-2006, 09:16 PM #8
Re: Schrader valve renewal
If you are going to pump it down then just hook up the gauges, close the liquid line valve, stick the screwdriver on the contactor and then close the suction valve when the gauge reads 0psig 'nuf said
-
15-01-2006, 11:20 PM #9
Re: Schrader valve renewal
Originally Posted by Slim R410a
You should also have in your PPE kit some heat (cold) resistant gloves shouldn't you ? Ideal for occasions like this.Brian - Newton Abbot, Devon, UK
Retired March 2015
-
16-01-2006, 08:19 AM #10
Re: Schrader valve renewal
If you do not want to drop the charge
Imperial make a tool (PINCH OFF TOOL 105-FF)
here is the link
http://www.stridetool.com/tools/hose...etools_01.html
this tool pinches off your pipe cutting supply of refrigerant to the fan cycle , so you can replace
without interference to the charge , when replaced it has rerounders of different diameters so you can reround your pipe and let refrigerant flow to the control.
MANITOWOC recommend using this tool on their
ice machines as to not interfere with the factory
charge when changing their fan cycles.The primary function of the design engineer is to make things difficult for the fabricator and impossible for the serviceman.
-
16-01-2006, 10:41 AM #11
Re: Schrader valve renewal
HI Just get yourself one of the schrader extractor tools I've had one for years and its paid for itself many times over.
T
-
16-01-2006, 11:41 AM #12
Re: Schrader valve renewal
I see on that link frank you pay 14 pound for a quik connector and 28 for the schrader tool. bargin. In Australia your up for $70.00 and $80-$90 respectivly.
I've got one of each. Need 2. It was suggested in our training that these items should be compulsory in everyones tool bag to be accredited. Best practice for minimal refrigerant loss.
-
16-01-2006, 12:44 PM #13
Re: Schrader valve renewal
At todays exchange rate the core extract tool £28 would cost $aus 65.58 so a fair saving. Now, taking into account the postage and my handling fee it may not be such a saving for you
-
16-01-2006, 05:39 PM #14
Re: Schrader valve renewal
Thanks for all the help.
I will pump it down using forced cooling mode, if that fails will push in the contactor like said...
I do have all the ppe etc
Cheers,Last edited by Slim R410a; 16-11-2007 at 06:39 PM.
-
16-01-2006, 09:04 PM #15
Re: Schrader valve renewal
Some condensing units do not bring the fan on when you push in the contactor hence the warning sticker on them
It's best to have the fan running when pumping down to ensure fluid phase change
-
16-01-2006, 10:01 PM #16
Re: Schrader valve renewal
Don't hold contactor in as this is incorrect procedure. I reckon Frank was only joking with you and as you said, you are more used to installation than service you will end up doing more damage to yourself than the air-con unit!
Be safe at all times
Jase
-
18-01-2006, 07:01 PM #17
Re: Schrader valve renewal
Pumped it down using the forced cooling mode today with no problem at all. (Cheers Brian)
-
18-01-2006, 07:05 PM #18
Re: Schrader valve renewal
Originally Posted by frank
I learn something new everyday
-
18-01-2006, 11:09 PM #19
Re: Schrader valve renewal
Originally Posted by Slim R410a
BTW if you want forced heating on a heat pump then select HEAT and press/hold the button again and an H will show this time. You don't get and fancy defrosting in this mode it will blow cold air inside!!Brian - Newton Abbot, Devon, UK
Retired March 2015
-
19-01-2006, 08:50 AM #20
Re: Schrader valve renewal
Originally Posted by frank
Gee Thanks Frank
-
19-01-2006, 10:19 AM #21
Re: Schrader valve renewal
Originally Posted by Brian_UK
-
20-01-2006, 12:06 PM #22
Re: Schrader valve renewal
mmmm, yes Brian. Is it possible to purchace stem removers and quik couplers for R410A systems?
-
31-03-2006, 03:41 PM #23
Re: Schrader valve renewal
Originally Posted by Marc O'Brien
Found a R410a quik couler manufactured by REFCO. Part number V-3541015. I was told they don't exist. And I have seen both schader core remover and coupler. I'll get back with a part number on the former
-
31-03-2006, 06:44 PM #24
Re: Schrader valve renewal
Ive had R410a quick couplers for ages, SRW do a set with a straight one and a 90 deg. one! Never had a cold burn since
Similar Threads
-
Fitting an expansion valve question
By Larry2 in forum Air ConditioningReplies: 20Last Post: 08-04-2008, 04:17 PM -
Scotsman commercial H2O inlet valve
By fullcourt in forum Trouble ShootingReplies: 9Last Post: 25-04-2006, 11:41 PM -
Need a correctly sized valve
By Abe in forum CommercialReplies: 2Last Post: 26-10-2005, 08:42 PM -
TEV with MOP: how to keep valve body temp above bulb temp?
By DaBit in forum FundamentalsReplies: 5Last Post: 16-10-2002, 12:38 AM -
Valve "Hunting"
By Abe in forum Trouble ShootingReplies: 20Last Post: 21-01-2002, 12:29 AM