First step with those pressures is to look at the drive end of the compressor and make sure the hub in the center is spinning, not just the belt pulley

Come back with that information and we can go from there.

.

Most of us drain the high side hose back to the system when we are done. So for fun I just charged my 6 foot high side hose on the gauge set with liquid. 36.5 grams according to my charging scale. One some of the newer, smaller systems 36 grams can make a difference. So I guess I should qualify my s...

Better leave yourself plenty of room to swing TWO wrenches wherever you leave a flare joint. Be prepared to apply 45 to 80 ft/lbs of torque to the fittings to meet spec. Once you have 2 or more bends in a hard line it becomes really difficult to "thread" anywhere. The minimum bend radius f...

Before you rip in to the control panel, spend the 20 bucks on a Mitchell DIY 1 subscription. A one month subscription will give you access to the FSM. The wiring diagrams are all there. How to get the dash apart, little things like that. May be some self test routines available too. You get a month ...

Copper is used in stationary units. Rarely flared, usually brazed. 50 foot coils of copper refrigeration tubing are expensive. And copper lines can be prone to cracking from vibration. Flared fittings are the devil. I have installed and serviced hundreds of high quality aircraft flare fittings. They...

Interesting.

How does the rear evaporator perform? Vent temps?

300 psi on the high side is common here on a 10 year old vehicle at 108 - 110 f.

We call 108f "9am in Havasu". Our goal is to keep the high side under 400 psi in Death Valley.

.

Search for

Short drop 90 beadlock

That will bring up fittings

Tangential block is the one with threads sticking straight "up" in your location

The FSM will have a chart with some wide ranges based on ambient temperature and humidity. Probably why the dealer says it is good enough. It does sound like the system is short on capacity. Does it do any better from the dash vents with the rear system shut down? I am puzzled by the relatively low ...

So use the tangential exit block, and a couple of short drop 90 degree fittings. Move the service ports off of the compressor - they don't need to be there.

Or use a 90 on one port and a 45 or 135 on the other. Lots of plumbing choices.

TBH I have never needed to re-clock an FS 10. There are passages inside to transfer intake and exhaust gasses from the pulley end to the rear - remember there are double ended pistons in that compressor. Both ends are a cylinder head. It is unlikely that Ford left room for a (useless to them) clocki...