Description Mack/Volvo Sanden Compressor Replaces OEM: 82768130 Manufacturer Number: 4751 Application: Mack/Volvo Description: Sanden SHD Comp 8 gr 123mm Volts: 12V Clutch Diameter: 123mm Number of Grooves: 8 groove Belt Type: Serpentine Number of Cylinders: 7 cyl. Factory Oil Charge: 300cc Oil Fitting Port Position: Rear Fitting Style: Pad Manifold A-B Distance: 36.6 Head Type: 4670 Wire Type: 2 Wire Metripack with Diode Replacement Clutch Assy: NSS Replacement Head Assy: NSS Model: SD7H15-Super HD Oil Type: PAG100-300cc Refrigerant Type: R134a Rotation: CW Shaft Type: Keyed Shaft Diode Protection: Yes DO NOT POWER PROBE THE COMPRESSOR CLUTCH. YOU WILL BLOW OUT THE DIODE AND THEN THE CLUTCH WON’T WORK AND THE WARRANTY WILL BE VOID A/C COMPRESSOR.