Year: 81
Make: VW
Model: Rabbit PU
Engine Size: 1.6L
Refrigerant Type: 134a
I have a Sanden SD508 9288 AC compressor that is NEW and so one might call it New old stock but new. From what I can tell it was made in January 1987 in Singapore and I assume the 7 in the serial number means 1987. My question is; is there and chance that this compressor has the HNBR seals, o-rings or anything take would make it compatible for the 134a freon because that is what it going to have in it plus the PAG 100 oil. I did see on another forum that the guy said the new Sanden pumps made in Singapore had the new type seals etc in them but I don't know just what he meant by new. And if this does not have the updated seals etc what do I need and where is a good place to buy it? thanks for taking a look Skip R
DO a search here for "Sanden 508 R&R" and you'll see the shaft seal and procedure on that compressor. I believe that body seals and such are neoprene and should be fine with R-134a. Make sure you drain the oil thoroughly.
Sanden never used Neoprene (as was common in GM/HRD).
I remember that it was after 1987 when Singapore switched from NBR to HNBR
I've had good success retrofitting NBR equipped compressors w/ POE lube
SD508 HNBR swash plate comp is more durable w/ PAG SP20 (not PAG 100) w/ R-134a
hotrodac
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Isentropic Efficiency=Ratio of Theoretical Compression Energy/Actual Energy.
AMAZON.com: How To Air Condition Your Hot Rod
Edited: Mon August 20, 2012 at 5:58 PM by ice-n-tropics
Aftermarket orings for that compressor are going to be compatible, they're listed on ackits.com
Edited: Tue August 21, 2012 at 5:15 AM by AutoCool
SP20 is Sandens "part number", it's Sanden brand oil and it's a PAG 100 oil. I think he meant to use POE (Ester oil) instead of SP20/PAG100. Slip of the keyboard.
Sanden used SP20 (SEC PAG from DOW) in Singapore comps at least till 2010 and USA comps till 2003 or 4. Viscosity is a lot thicker than PAG 100
SEC PAG is not the best for retrofit if there is any residual R-12 absorbed in the residual mineral oil due to copper plating and sludge. I have used POE (Union Carbide) in 20 Sanden retrofits in cars and HD trucks where there is residual mineral oil without CU plate or sludge plus the sight glass does not turn milky as with PAG at high ambient.
Sanden SP10 is DEC PAG and OK for retrofit and same viscosity as PAG 100.
hotrodac
-------------------------
Isentropic Efficiency=Ratio of Theoretical Compression Energy/Actual Energy.
AMAZON.com: How To Air Condition Your Hot Rod
Edited: Thu August 23, 2012 at 4:08 PM by ice-n-tropics
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