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Home >> Audi >> 2019 >> A3 Premium >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> Air Conditioning (HVAC) [Convertible] (1 Of 2) >> 87 Air Conditioning >> A/C Compressor >> Overview - Belt Pulley, Mechanically Driven A/C Compressor >> Overview - Belt Pulley, SANDEN A/C Compressor, Version 2

Overview - Belt Pulley, SANDEN A/C Compressor, Version 2

NOTE:

Installed on vehicles with 5-Cylinder engine (Audi RS3) with ribbed belts on the A/C compressor.

For vehicles with a 5-cylinder engine (Audi RS3), depending on the engine one or two ribbed belts are attached to the A/C compressor. Therefore a belt pulley with a single or double belt guide is on the A/C compressor. Refer to RIBBED BELT, REMOVING AND INSTALLING .

If the belt pulley overload protection is triggered, check the A/C compressor for ease of movement before replacing the belt pulley. If the A/C compressor creates friction, replace it completely.

The A/C compressor can be removed and installed at the bracket on engine without opening the refrigerant lines.

The A/C compressor can be removed and installed at the bracket on engine without opening the refrigerant lines.

Fig 1: Belt Pulley, Sanden A/C Compressor Exploded View
GWWA87-10604Courtesy of AUDI OF AMERICA, LLC
  1. Hex Nut
    NOTE:

    The A/C compressor shaft may be covered with a plastic cap to protect the threads on it (the plastic cap is not illustrated).

    • To loosen and tighten hex nut, hold belt pulley firmly in place using a standard band wrench (with webbing).
    • Clean threads of hex nut and threads of A/C compressor shaft of old thread locking compound before screwing on.
    • Install the hex nut with thread locking compound (for example, with D 000 600 A2). Refer to the Parts Information.
    • Nut tightening specification: 25 Nm
  2. Screw
    • To loosen and tighten bolts, hold belt pulley firmly in place using a standard band wrench (with webbing).
    • Tightening specification 12 Nm
    • Clean old bolt locking compound from thread of bolts and threads of belt pulley before screwing on.
    • Install the bolts with thread locking compound (for example, D 000 600 A2). Refer to the Parts Information.
  3. Drive Plate
    • With overload protection (securing spring elements), it is activated when the torque is too great (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor.
    • The drive plate spring elements dampen vibrations and noise.
  4. Spacer
  5. Circlip
    • Replace
    • Install on proper side, beveled insertion edge -A- faces away from A/C compressor (install flat side facing the A/C compressor)
    • When installing the circlip, note that it cannot be bent open more than is necessary for installation.
  6. Belt Pulley with Double Belt Guide
    • Clean A/C compressor flange before sliding on pulley.
    • With rubber elements -B- and threaded plates -C- for decoupling belt pulley from A/C compressor input shaft (rubber elements damp vibrations and noise).
      NOTE:

      The threaded plates -C- can also be connected to each other by a ring, depending on the version.

      For vehicles with a 5-cylinder engine (Audi RS3), two belts are guided over the belt pulley.

  7. A/C Compressor
    • There are different versions depending on engine installed and the vehicle market. Refer to the Parts Information.
    • Clean A/C compressor flange before sliding on pulley.
      NOTE:

      There are different versions depending on the refrigerant (R134a or R1234yf). Refer to Parts Information.

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