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sdw
04-02-2012, 05:56 PM
My ARC brake pressure switch is weeping. Since i haven't had ARC's for years i would like to put a plug in there and stop this nonsense once and for all.

Does anyone know the thread size?

This is for a '91

Regards

Sean

Mike8675309
04-02-2012, 08:26 PM
3/8" SAE Fine Thread bolts will thread in. But it's an o-ring seal, not tapered threads like pipe thread. You need something like a Hydraulic plug, I was never able to track one down that would fit at a local place. If you have a local shop that stocks Aeroquip or parker hydraulic fittings you may have luck. Though they typically just stock big stuff.

the-big-e
04-02-2012, 09:28 PM
Find a Crown Vic and check just below the steering shaft....

They have the same type of sensor, but with a different electrical connector....

91 XR7
04-02-2012, 10:26 PM
there is a supply shop (Greenline) near Sean that should have the plugs that work.

PN: 1100-03 (O-RING BOSS ORB HEX PLUG)
PN: 1100H-03 (O-RING BOSS ORB HOLLOW HEX PLUG)


And they may have other options

sdw
04-02-2012, 11:02 PM
there is a supply shop (Greenline) near Sean that should of plugs that work.

PN: 1100-03 (O-RING BOSS ORB HEX PLUG)
PN: 1100H-03 (O-RING BOSS ORB HOLLOW HEX PLUG)


And they may have other options

Thanks Kevin!

regards

Sean

Mike8675309
04-03-2012, 12:03 PM
If you can get the specs for those, please post them. That will help others source similar parts in their area.

91 XR7
04-03-2012, 10:56 PM
For some reason i'm having issues with the PDF files on their website, but i have their Catalogs at work, so if it remember (big if there) I can see about what i can find out..

but they are Both 3/8-24 plugs, The top # is a HEX headed plug, the Lower # uses a Allen Head for tightening

I'm not certain what kind of O-ring comes with them, but both fittings are for Hydraulic use so. One can always swap up Crush washers for the O-ring setup.

TbSCbos13
04-25-2012, 09:18 PM
Is the junction block the switch threads into just a bulky T-fitting or is there a proportioning valve in it. If it's just a T then couldn't you just use a couple of line unions and an extra piece of brake line?

RalphP
04-25-2012, 10:59 PM
There's a proportioning valve in it, but you COULD use an after market one instead.

I just put the brake light switch in there, and disconnected the ARC myself.

RwP

hsommer
05-13-2015, 07:33 PM
Will this plug work?

http://www.mcmaster.com/#50925k337/=x62y2n

Thread Size 3/8"-24
Maximum psi @ 72 F 7,500
Additional Specifications UN/UNF Hex-Head Plugs
Use with air, water, hydraulic oil
RoHS Not Compliant
Heavy duty forged or bar stock construction gives these little fittings a lot of might. Made of zinc-plated steel for corrosion resistance. Meet ASTM A108 or A576.

Connections: NPTF (Dryseal), which are compatible with NPT threads, or UN/UNF straight threads.

Plugs are hollow and have a Buna-N O-ring for a tight seal.

Kurt K
05-13-2015, 07:48 PM
Will this plug work?

http://www.mcmaster.com/#50925k337/=x62y2n

Thread Size 3/8"-24
Maximum psi @ 72 F 7,500
Additional Specifications UN/UNF Hex-Head Plugs
Use with air, water, hydraulic oil
RoHS Not Compliant
Heavy duty forged or bar stock construction gives these little fittings a lot of might. Made of zinc-plated steel for corrosion resistance. Meet ASTM A108 or A576.

Connections: NPTF (Dryseal), which are compatible with NPT threads, or UN/UNF straight threads.

Plugs are hollow and have a Buna-N O-ring for a tight seal.

That looks like it would work to me.

Nanana12
11-11-2015, 05:42 AM
good good good

Mike Puckett
11-11-2015, 11:03 AM
Take the sensor out and solder the hole shut and put it back in. Did that to mine several years ago. No more leaky.

hsommer
11-12-2015, 09:38 AM
It worked.