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Can't charge my system!

tsaign on Thu August 04, 2005 7:41 PM User is offline

Year: 1988
Make: Jeep
Model: Grand Wagoneer
Engine Size: 5.9L
Refrigerant Type: R-12

Replaced condenser,drier,all hoses, expansion valve, charged system compressor wasn't working and service valves leaking.

Now I'm trying to charge my system after replacing compressor and service valves.

The mastercool hoses aren't depressing the schrader valve enough for me to recharge.

What can I do??

Chick on Thu August 04, 2005 7:47 PM User is offlineView users profile

Your service valves don't have shrader valves? If not, use retrofit fittings.. If you have shrader valves, back them out a bit so the coupler depresses them..If you're not retrofitting, then you don't back the service valves all the way out, just crack them open or you'll close the system...Hope this helps.

Oh, and be sure you're pulling a proper vacuum, as air in the system may prevent the refrigerant from going in..A Vacuum must be pulled and recharged into the vacuum...

Email: Chick


Freedoms just another word for nothing left to lose

Edited: Thu August 04, 2005 at 7:52 PM by Chick

tsaign on Thu August 04, 2005 8:16 PM User is offline

The stock service valves w/o schrader(s) weren't available.

They were replaced with aftermarket valves that have schrader valves.

I'll try to back them out, but the hose coupler(s) are pretty deep, not sure if that will be enough??

I had the truck @ an A/C shop yesterday, and their system had no problems pulling a vacuum and charging the system.

Pretty lame that the new mastercool hoses I bought may be useless to me....

Chick on Thu August 04, 2005 8:31 PM User is offlineView users profile

If the service valves have shraders, then remove them since you have the isolation valves, or make sure you have the hoses are on right with the shrader depressor on the right end. (thats if R12 hoses) Hope this helps.

Email: Chick


Freedoms just another word for nothing left to lose

tsaign on Thu August 04, 2005 8:51 PM User is offline

Can't remove them.....Maybe I should have been clearer?

Old service valves could not be used (leaking badly!!)

Replacements are not available from anyone.
Believe me I tried...

The aftermarket "connectors" I got, work to connect my hoses to the compressor, but aren't service valves.
They are simply adapters w/ schrader(s).

The shop I had my truck @ yesterday didn't have any problems evac/charge/test/evac my system, so I know it's my hoses that are the problem.
They are installed correctly, schrader depression ends to ports/can tap, standard ends to gauge manifold, and R-12 is being used.

I'm so annoyed that these hoses don't work!
Looks like I'm screwed, and will have to take the truck back to the shop and spend more $$$$!

Anyone want to buy a brand new manifold w/ new hoses? Useless to me....

RxSteven on Thu August 04, 2005 9:04 PM User is offline

On the set of hoses I have (interdynamics), the shrader depressor can be adjusted in and out by turning it.
I had it out too far to begin with, it only needs to slightly depress it, otherwise you will lose some refrigerant while trying to unscrew it.

DNT on Thu August 04, 2005 9:14 PM User is offlineView users profile

Take a closer look at the hose ends, if they are built like yellow jacket hoses the depressor is adjustable you simply screw it out a bit with a pair of needlenose pliers and it will depress the schrader, you can get a extra 1/8 to 3/16 on the yellow jacket hoses. If that does not work a 90 degree shutoff valve always reachs as deep as needed it has a pin with a thumb wheel that you screw in to depress the schrader residential AC guys always have them handy since some AC units use the deep schraders and sometimes even the adjustment to the hose end depressor does not work. Another real neat tool for R12R22 is the schrader removal tool where you can actually remove the schrader without loosing the charge makes charging evacuating real fast as it eliminates the small opening at the schrader lots of adaptors at your local HVAC supply house and I bet your friendly site sponsor has them also (plug)

Anyone who gives up freedom for the sake of safety, deserves neither freedom nor safety!

esquire on Thu August 04, 2005 9:19 PM User is offline

I might be interested in them. What are you asking for them?

tsaign on Thu August 04, 2005 10:07 PM User is offline

Hoses don't adjust....turning them results in same result....*slight* piddle of pressure from valve.

I'm going to try and get a schrader tool, and see if I can get the schrader(s) out farther??

Everything on this AC system has been such a pain in the a**, I'm ready to push the truck off a cliff!
Between getting the hoses redone twice, wrong parts, parts that don't fit, and now this!!

Normally I wouldn't get this frustrated, but a weekend thing has turned into a 3 week project from hell.
I'm leaving on a long trip w/ baby tomorrow, and AC has to work!

Chick on Thu August 04, 2005 10:15 PM User is offlineView users profile

If there is a shrader valve, it has to screw out. a tire valve stem remover should also work..Just back it out a bit, and then tighten after charged..Stay calm..You'll have cold air soon..Hope this helps.

Email: Chick


Freedoms just another word for nothing left to lose

tsaign on Fri August 05, 2005 1:44 AM User is offline

Well that didn't work either....I can only get about 1/4 turn out of them before they start leaking.
Not enough for my hoses to open them for vac/charge...(grrr)

Oh well, looks like it's another trip to the shop and piss away another $65.

What a f*in' joke, never had a problem like this before.

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