Maybe the diode in the clutch harness on the compressor or the TPS (thermal protection switch) mounted at the rear side if the compressor housing has failed open due to reverse polarity or a negative voltage disengagement spike or back EMF from fan problems.
The TPS is intended to disengage the ...
Search found 163 matches
- Mon Aug 27, 2018 1:36 pm
- Forum: Automotive Air Conditioning Forum
- Topic: 2006 Civic DX AC not working
- Replies: 10
- Views: 15569
- Wed Aug 15, 2018 1:17 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Toyota pickup AC questions
- Replies: 31
- Views: 66307
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
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
- Tue Aug 14, 2018 7:10 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Need advice selecting a compressor
- Replies: 8
- Views: 17180
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 ...
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 ...
- Tue Jul 24, 2018 3:44 pm
- Forum: Automotive Air Conditioning Forum
- Topic: strange cooling
- Replies: 56
- Views: 139029
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 with heat ...
- Mon Jul 23, 2018 7:27 am
- Forum: Automotive Air Conditioning Forum
- Topic: 1996 geo metro ac oil?
- Replies: 3
- Views: 6749
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 ...
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 ...
- Sat Jul 21, 2018 7:35 am
- Forum: Automotive Air Conditioning Forum
- Topic: Challenger Tractor A/C Problems...
- Replies: 11
- Views: 23182
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
hotrodac
- Fri Jul 20, 2018 6:56 am
- Forum: Automotive Air Conditioning Forum
- Topic: Challenger Tractor A/C Problems...
- Replies: 11
- Views: 23182
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 ...
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 ...
- Thu Jul 19, 2018 3:05 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Challenger Tractor A/C Problems...
- Replies: 11
- Views: 23182
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.
Some ...
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.
Some ...
- Thu Jul 19, 2018 2:40 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Ford Bronco 2 AC questions
- Replies: 13
- Views: 22203
- Fri Jul 13, 2018 12:34 pm
- Forum: Automotive Air Conditioning Forum
- Topic: Challenger Tractor A/C Problems...
- Replies: 11
- Views: 23182
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 ...
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 ...