Search found 69 matches

by ice-n-tropics
Sat Jul 21, 2018 7:35 am
Forum: Automotive Air Conditioning Forum
Topic: Challenger Tractor A/C Problems...
Replies: 11
Views: 158

Re: Challenger Tractor A/C Problems...

No more validation testing focus or that type of problem solving, but AG dry lock is a really big deal. Deere has several OEM counter measure designs.
hotrodac
by ice-n-tropics
Fri Jul 20, 2018 6:56 am
Forum: Automotive Air Conditioning Forum
Topic: Challenger Tractor A/C Problems...
Replies: 11
Views: 158

Re: Challenger Tractor A/C Problems...

Just a theory: after daily crankwashout of PAG from thermal migration of R-134a w/o daily operation, the bearing surfaces are squeeky clean. Mineral oil is not solubable with R-134a so some should remain on bearings to survive 2500 crpm startup. One of the lube enhancers may work better than 5GS as ...
by ice-n-tropics
Thu Jul 19, 2018 3:05 pm
Forum: Automotive Air Conditioning Forum
Topic: Challenger Tractor A/C Problems...
Replies: 11
Views: 158

Re: Challenger Tractor A/C Problems...

Ag applications can cause liquid slugging and oil wash out of the compressor. Additional R134a without appropriate oil charge increase would magnify "Dry Lock" of compressor. Cool mornings (and cold compressor) with sun on the cab and warn evaporator will cause liquid migration to suction....
by ice-n-tropics
Thu Jul 19, 2018 2:40 pm
Forum: Automotive Air Conditioning Forum
Topic: Ford Bronco 2 AC questions
Replies: 8
Views: 121

Re: Ford Bronco 2 AC questions

Encyclopedia 2x0! Heck, I knew that.
hotrodac
by ice-n-tropics
Fri Jul 13, 2018 12:34 pm
Forum: Automotive Air Conditioning Forum
Topic: Challenger Tractor A/C Problems...
Replies: 11
Views: 158

Re: Challenger Tractor A/C Problems...

Don't think AGCO made any changes in CAT design spec's. Maybe thermostat is not operating and clutch cycles on low ambient 6 psi switch, causing evaporator icing. System is unique in that accumulator is a counter measure against liquid slugging on a thermostat clutch cycling system. Saw a yellow AGC...
by ice-n-tropics
Fri Jun 29, 2018 2:41 pm
Forum: Automotive Air Conditioning Forum
Topic: Working on fire engine AC (again)
Replies: 24
Views: 502

Re: Working on fire engine AC (again)

Preferred fire engine condenser is a Red Dot roof mount. Hot air recirculation back into the front of the vehicle during long idle (especially with tail wind) causes high side spike and raises vent temp. Feathers, especially Morning Dove, are better dealt with on the tailgate but skin on the breast ...
by ice-n-tropics
Tue Jun 26, 2018 3:54 pm
Forum: Automotive Air Conditioning Forum
Topic: Full size Ford custom A/C project
Replies: 4
Views: 160

Re: Full size Ford custom A/C project

Probably disappointing to use a 5.5 " high evaporator hung over the hump. I installed a Mark IV slim line under dash evap similar to the one shown on this web site in my 65 Ford convertible and drove all over USA with great cooling. By utilizing the passenger foot real estate and recirculation ...
by ice-n-tropics
Sun Jun 17, 2018 5:18 pm
Forum: Automotive Air Conditioning Forum
Topic: No low pressure
Replies: 17
Views: 717

Re: No low pressure

I would remove 6 bolts on the rear of the compressor and the rear head and inspect for a loosened bolt for the retainer of the discharge valves.
hotrodac
by ice-n-tropics
Wed Jun 06, 2018 3:27 pm
Forum: Automotive Air Conditioning Forum
Topic: Oil amount determination with different style replacement compressor?
Replies: 3
Views: 267

Re: Oil amount determination with different style replacement compressor?

If it was genuine Sanden the correct oil amount in already included inside the new Sanden replacement compressor which has generally been 8 oz for a CCOT system.
hotrodac
by ice-n-tropics
Mon Jun 04, 2018 2:39 pm
Forum: Automotive Air Conditioning Forum
Topic: New compressor. Not cooling well.
Replies: 21
Views: 772

Re: New compressor. Not cooling well.

Failed compressor valves allow rapid high to low side equalization reverse gas flow carrying contamination through the compressor itself into the suction line, rather than through the normal forward expansion device flow. Compressor exchange without suction side flushing can result in multiple compr...

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