Europian countries still seem to need A/C during summer...
My A80Q B4 Limo with 2.8 AAH engine V6 has suffered non working manually driven A/C (NO A/C automatics exist) for a long time.
The car had original R12 compressor system and luckily all stickers on top of compressor existed.
Compressor has enable A/C plug and the 2 pole RPM sender plug and driven with long V6 2260mm nicely routed (check etka when refitting...) multi groove belt
Audi: 4A0260805D ( and another code 506031-02447)
Zexel type: DCW-17B
Zexel part: 506231-0252
Serial: like Japanese quality products do have... 261J807825
Oil (original for R12) D-90PX 300cc
R12 Leak test high side 30kg/cm2, low side 15kg/cm2, high pressure exp valve 37kg/cm2
Zexel part number is important (and also the coding .... 805D) when searching for new replacement compressor
My old .... 805D AC compressor has INCH threaded connectors at the back of the compressor
- those threads look close to metric but below the car when fitting compressor pipes you get crazy with the non matching threads.
http://www.alanko1.de//dateien/Kompr...log_Online.pdf
- with audi codes, zexel codes and compatibility
- that has 4A0260805D (550 130 vs. later 550 030); see also compatibility chart
( what was the factory reasoning to change from inch based threads to metric threads ?)
https://www.ebay.de/sch/i.html?_from...0805D&_sacat=0
Learning point is that ask before the deal about RPM sensor and pipe connection thread type.
The compressor what I ordered had the RPM sensor but metric threads at the back of the compressor.
Some butchering was done and rear plate from old compressor was moved to new compressor
( warranty expires) but pipe threads are then matching.
Back end bolts were tightened to equal torque and bolts were oiled.
The new compressor had "installation oil" only
=> the new compressor was "cleaned" with with Hella BEHR PAO68
(use color version or regular oil) that is recommended in Hella pdf for R12 retrofits.
Interesting A/C product finding was an errecom small leaks fix fluid that is promised to
fix smaller than 0,3mm "problems". I don have experience if that fix is good or not.
https://www.ebay.de/sch/i.html?_from...treme&_sacat=0
See the tube videos of errecom
https://www.youtube.com/watch?v=0m-v4OpC4X0
https://www.youtube.com/channel/UCZ-...b0RN8Uv3mAra1Q
http://www.eurorefrigerant.com/r134a...-cylinder.html
Next step will be the system vacum test and nitrogen presure test before filling with r134a.
All O-rings have been changed, new drier changed in the whole system for pipes and sensors.
O-ring sizes from ETKA and rigs from local O-ring shop. Old system may still have many points of leak failure, but lets see.
If pressure test is successful the drier is changed and system vacuumed again and then r134a filled.
Remember that total oil quantity in system must be 300cc.
System has still deposits of old R12 oil residues unless all parts washed with AC wash system.
Old compressor did not have any metal flakes inside.
Possibilities for bad A/C experience exist, but lets see if lucky or not or do I need another new compressor.
better clean results with pro machine - that takes several hours at proshop.
https://www.hella.com/techworld/uk/T...C-system-1891/
My A80Q B4 Limo with 2.8 AAH engine V6 has suffered non working manually driven A/C (NO A/C automatics exist) for a long time.
The car had original R12 compressor system and luckily all stickers on top of compressor existed.
Compressor has enable A/C plug and the 2 pole RPM sender plug and driven with long V6 2260mm nicely routed (check etka when refitting...) multi groove belt
Audi: 4A0260805D ( and another code 506031-02447)
Zexel type: DCW-17B
Zexel part: 506231-0252
Serial: like Japanese quality products do have... 261J807825
Oil (original for R12) D-90PX 300cc
R12 Leak test high side 30kg/cm2, low side 15kg/cm2, high pressure exp valve 37kg/cm2
Zexel part number is important (and also the coding .... 805D) when searching for new replacement compressor
My old .... 805D AC compressor has INCH threaded connectors at the back of the compressor
- those threads look close to metric but below the car when fitting compressor pipes you get crazy with the non matching threads.
http://www.alanko1.de//dateien/Kompr...log_Online.pdf
- with audi codes, zexel codes and compatibility
- that has 4A0260805D (550 130 vs. later 550 030); see also compatibility chart
( what was the factory reasoning to change from inch based threads to metric threads ?)
https://www.ebay.de/sch/i.html?_from...0805D&_sacat=0
Learning point is that ask before the deal about RPM sensor and pipe connection thread type.
The compressor what I ordered had the RPM sensor but metric threads at the back of the compressor.
Some butchering was done and rear plate from old compressor was moved to new compressor
( warranty expires) but pipe threads are then matching.
Back end bolts were tightened to equal torque and bolts were oiled.
The new compressor had "installation oil" only
=> the new compressor was "cleaned" with with Hella BEHR PAO68
(use color version or regular oil) that is recommended in Hella pdf for R12 retrofits.
Interesting A/C product finding was an errecom small leaks fix fluid that is promised to
fix smaller than 0,3mm "problems". I don have experience if that fix is good or not.
https://www.ebay.de/sch/i.html?_from...treme&_sacat=0
See the tube videos of errecom
https://www.youtube.com/watch?v=0m-v4OpC4X0
https://www.youtube.com/channel/UCZ-...b0RN8Uv3mAra1Q
http://www.eurorefrigerant.com/r134a...-cylinder.html
Next step will be the system vacum test and nitrogen presure test before filling with r134a.
All O-rings have been changed, new drier changed in the whole system for pipes and sensors.
O-ring sizes from ETKA and rigs from local O-ring shop. Old system may still have many points of leak failure, but lets see.
If pressure test is successful the drier is changed and system vacuumed again and then r134a filled.
Remember that total oil quantity in system must be 300cc.
System has still deposits of old R12 oil residues unless all parts washed with AC wash system.
Old compressor did not have any metal flakes inside.
Possibilities for bad A/C experience exist, but lets see if lucky or not or do I need another new compressor.
better clean results with pro machine - that takes several hours at proshop.
https://www.hella.com/techworld/uk/T...C-system-1891/
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