‘93 W900L A/C issues

Looking at his bracket, he could adapt it, by drilling 4 holes closer together, or get a whole new piece of channel, and easily make a new bracket to fit a pad mount Sanden. All the conversion kits I’ve seen use an ear mount compressor. I’ve got one of those adapter brackets, I’ll never use. The new SDH7 compressors w/ fused clutches, that still spin, if compressor locks up, only come in pad mount, not ear mount. That’s why I never used it.

 

I converted mine to Sanden with an actual Paccar bracket/plumbing conversion kit I bought new off Ebay 4 or 5 yrs ago. Worked slick. Got to the point that all I could seem to find in York were reman. Red Dot or CCI and they were always bad out of balance to start with and never got over 2yrs 250k without a lock up or hammering episode. Bought the Sanden new at Fleetpride for under 300 bucks. Higher BTU and smoother. Not saying the York is bad. Just decided to try new genuine Sanden. There are alot of knock offs out there of both. Just bought a new replacement for 379 from Peterbilt and it was cheap but it is no real Sanden. Holes for pad didn't even line up right....

 

I think they’re just shut off valves. No need to touch them at all.

 

I would think if you screw them in, it closes the Compressor and the line off. Screw them out to open them. Normal operation should be out all the way. Nice if changing the compressor, without losing all the Freon. Ideally shut offs at every component would be nice. But more chances for leaks.

 

Look at the old switch. See if you can still read it. Should be NC, or NO, stamped on it. Or maybe the RD#, for reference. Otherwise, a Kenworth Dealer can run your vin #, and get you the right one, or at least tell you, the part#, if they’re out of stock.

 

Almost positive that screwed all the way out is normal operation. Mid ways is for charging and all the way in shuts line off .

Also, I know what your saying about f arm tractors and Yorks. Neighbor has a 7700 Ford that was OE York. Was real bad since new about chucking the belt off. Had to have a particular Gates belt that was pricey to keep it on at all. I replaced the tired York with a new one like it and same problem , but worse. I added an idler to the long run of the belt and helped it alot, but after one hay season I made brackets and switched to Sanden. Been 6 yrs ago and still going.