A/C psi range for Gen III

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A/C psi range for Gen III #1003716 07/20/10 04:49 PM

Joined: Apr 2010

Posts: 99

California

Inyo_man

Getting the Wheeling Fever

Is the psi range for the "low", suction tube 17-20?
My Gen III needs a recharge.
Is it a must to check the "high" psi? The charge kit only comes with a gauge for the suction tube.

'02 Montero: OME suspension, ARB front bumper, homemade skid plates & spare tire Blitz can mount, extended diff. breather, K&N air filter, Optima Yellow Top, BajaRack, IPF lights, Goodyear Duratrac 265/75/16's, RUD 4x4 Grip chains

Re: A/C psi range for Gen III [Re: Inyo_man] #1003717 07/20/10 05:36 PM

Joined: Jan 2001

Posts: 13,649

Helen , GA

fasteddy

Web Wheeler

The gauges I am familiar with are grauated in temp degrees, and you charge it to close to freezing. You don't need to test high side pressures unless something is broken, and they are high enough to be dangerous and hard for a cheap gauge to deal with...

Not responsible for advice not taken...

Re: A/C psi range for Gen III [Re: fasteddy] #1003718 07/20/10 06:45 PM

Joined: Apr 2006

Posts: 1,193

Bouse az

mxmikie

Body Damage is Cool

low side should be 32-35

it dosent have to be surrounded by water to be an island

Re: A/C psi range for Gen III [Re: Inyo_man] #1003719 07/20/10 07:34 PM

Joined: Mar 2005

Posts: 1,006

South East U.S.A.

pcc

Body Damage is Cool

Pressure is dependent on ambient temperature. The re-charge can should have a temp/pressure chart to go by, but 35-40 low side (as stated) is good rule of thumb. I would also recommend using a thermometer on the upper air vent which will also help to know when to stop adding R134. Open front doors and use recirc so that engine heat won't give false ambient temp. Fan speed should be about half speed. But be patient and fill slowly a bit at a time and let the system settle before determining if you need more refirgerant.

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles

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