Search found 73 matches

by ice-n-tropics
Wed Aug 15, 2018 1:17 pm
Forum: Automotive Air Conditioning Forum
Topic: Toyota pickup AC questions
Replies: 19
Views: 454

Re: Toyota pickup AC questions

Opportunity for improvement/learning curve for next AC service:
Evidence of a good compressor is to pump up to the PRV (pressure relief valve) pop off pressure about 420 psi (the first time) and blow out oil with leak dye and R-134a.
hotrodac
by ice-n-tropics
Tue Aug 14, 2018 7:10 pm
Forum: Automotive Air Conditioning Forum
Topic: Need advice selecting a compressor
Replies: 7
Views: 161

Re: Need advice selecting a compressor

Sanden's Singapore factory makes a SD5H14 (134a version of SD508) with CCW specs. SD7V16 CCW spec is used on VW diesel CCW engines but has some past problems with frisbee clutch armature plates when the CW shaft nut unscrews due to bad torque, surface finish or shaft spline loosness. Standard SD508 ...
by ice-n-tropics
Tue Jul 24, 2018 3:44 pm
Forum: Automotive Air Conditioning Forum
Topic: strange cooling
Replies: 43
Views: 1268

Re: strange cooling

I documented and installed a modified Vintage Air HVAC in a 1961 Pontiac Bubble Top 389 with a Sanden SD5H14 compressor which is covered in Chapter 10 of "How to Air Condition Your Hot Rod" (book available from Vintage Air). I was able to install a adequate modern parallel flow condenser w...
by ice-n-tropics
Mon Jul 23, 2018 7:27 am
Forum: Automotive Air Conditioning Forum
Topic: 1996 geo metro ac oil?
Replies: 3
Views: 115

Re: 1996 geo metro ac oil?

Compressor built by Sanden in JAPAN with Sanden SP-10 double end capped PAG same as ND pag and similar to PAG 46 viscosity. Other applications of the SD7-B10 use only 3 oz. because the body ported compressor utilizes all suction flow through the crankcase to supply cool oil continuously directly to ...
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: 343

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: 343

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: 343

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: 13
Views: 384

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: 343

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: 37
Views: 1067

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 ...

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