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Auxiliary Unit Transmission

Fig 1: Auxiliary Unit Drive
GLL156957Courtesy of VOLVO CARS CORPORATION
Number  Designation  Number  Designation 
1 Servo pump 4 Intermediate shaft
2 Guide pulley 5 Belt tensioner
3 Air conditioning (A/C) compressor 6 Coolant pump

The auxiliary units are located at the upper edge of the cylinder block, above the transmission. They are driven by two systems, a Poly-V-belt driven system and a clutch system. These two systems are driven by the intermediate shaft transmission.

The belt system consists of a 6-ribbed Poly-V belt, an automatic belt tensioner and a guide pulley. This system drives the servo pump and AC compressor. The coolant pump is driven by the servo pump via the clutch system.