Audi Q3: Overview - Belt Pulley, Valeo A/C Compressor

1 - Bolt

• 17 Nm
• Replacing

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

- Clean the thread of the bolts, which are screwed in with locking compound, with a wire brush. Then insert the bolts with locking compound. For the locking compound, refer to the Parts Catalog.

2 - Bolt

• 7 Nm

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

- Clean the thread of the bolts, which are screwed in with locking compound, with a wire brush. Then insert the bolts with locking compound. For the locking compound, refer to the Parts Catalog.

3 - Drive Plate

• Removing and installing. Refer to → Chapter "Belt Pulley, Removing and Installing, Valeo A/C Compressor".
• The overload protection takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor
• With rubber element for decoupling belt pulley from A/C compressor driveshaft, dampens vibrations and noise

4 - Circlip

• Replacing
• Install on proper side, beveled insertion edge -A- faces away from A/C compressor - install flat side faces the A/C compressor

5 - Belt Pulley

• Removing and installing. Refer to → Chapter "Belt Pulley, Removing and Installing, Valeo A/C Compressor".

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

6 - Air Conditioning (A/C) Compressor

• Clean the A/C compressor driveshaft before setting the belt pulley on it

Overview - Belt Pulley, Sanden A/C Compressor, Version 1

  Note

• Installed on vehicles with a 4-cylinder engine
• If the belt pulley overload protection is triggered, check the Air Conditioning (A/C) compressor for ease of movement before replacing the belt pulley. If the A/C compressor creates friction, replace it completely.
• The function of overload protection for pulley is described in, for example, the Self Study Program 240 Audi A2 Technical Information.
• The A/C compressor can be removed and installed at the bracket on engine without opening the refrigerant lines.

1 - Nut

• 25 Nm

- To loosen and tighten hex nut, hold the belt pulley firmly in place using a commercially available strap wrench (with cloth tape).

- The thread of the nut, which was installed with locking compound, must be cleaned (for example, using a thread tap). Otherwise, there is a danger that the input shaft breaks off during assembly.

- Clean the thread of the A/C compressor input shaft with a wire brush.

- Insert the nut with locking compound. For the locking compound, refer to the Parts Catalog.

2 - Bolt

• 4.5 Nm

- Hold the belt pulley securely with a commercially available strap wrench (with cloth tape) to loosen and tighten the bolts.

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

- Clean the thread of the bolts, which are screwed in with locking compound, with a wire brush. Then insert the bolts with locking compound. For the locking compound, refer to the Parts Catalog.

3 - Drive Plate

• The overload protection takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor
• With rubber element for decoupling belt pulley from A/C compressor driveshaft, dampens vibrations and noise

4 - Washer

5 - Circlip

• Replacing
• Install on proper side, beveled insertion edge -A- faces away from A/C compressor - install flat side faces the A/C compressor

6 - Belt Pulley

7 - Air Conditioning (A/C) Compressor

• Clean the A/C compressor driveshaft before setting the belt pulley on it

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

  Note

• Installed on vehicles with a 4-cylinder engine
• If the belt pulley overload protection is triggered, check the Air Conditioning (A/C) compressor for ease of movement before replacing the belt pulley. If the A/C compressor creates friction, replace it completely.
• The function of overload protection for pulley is described in, for example, the Self Study Program 240 Audi A2 Technical Information.
• The A/C compressor can be removed and installed at the bracket on engine without opening the refrigerant lines.

1 - Nut

• 25 Nm

  Note

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

- Hold the belt pulley securely with a commercially available strap wrench (with cloth tape) to loosen and tighten the hex nut.

- The thread of the nut, which was installed with locking compound, must be cleaned (for example, using a thread tap). Otherwise, there is a danger that the input shaft breaks off during assembly.

- Clean the thread of the A/C compressor input shaft with a wire brush.

- Insert the nut with locking compound. For the locking compound, refer to the Parts Catalog.

2 - Bolt

• 12 Nm

- Hold the belt pulley securely with a commercially available strap wrench (with cloth tape) to loosen and tighten the bolts.

- The threaded bolt holes, into which the self-locking bolts or bolts with locking compound were installed, must be cleaned (for example with a thread tap). Otherwise, there is a danger that the bolts break off during assembly.

- Clean the thread of the bolts, which are screwed in with locking compound, with a wire brush. Then insert the bolts with locking compound. For the locking compound, refer to the Parts Catalog.

3 - Drive Plate

• The overload protection (securing spring elements); takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor.
• Drive plate spring elements dampen vibrations and noise

4 - Circlip

• Replacing
• Install on proper side, beveled insertion edge -A- faces away from A/C compressor - install flat side faces the A/C compressor

5 - Belt Pulley

• With rubber elements -B- and threaded plates -C- for decoupling belt pulley from A/C compressor input shaft, dampens vibrations and noise

  Note

• The threaded plates can also be connected to each other by a ring, depending on the version.
• For "cold climate" vehicles (for example, central and northern Europe), A/C compressors with a smaller displacement are installed. On these A/C compressors, the belt pulley is slightly different from the one illustrated here (the rubber elements -B- are, for example, as a vibration damper not present). Refer to the Parts Catalog.

6 - A/C Compressor

• Clean the A/C compressor driveshaft before setting the belt pulley on it

Overview - Belt Pulley, Sanden A/C Compressor, Version 3

  Note

• Installed on vehicles with a 5-cylinder engine
• If the belt pulley overload protection is triggered, check the Air Conditioning (A/C) compressor for ease of movement before replacing the belt pulley. If the A/C compressor creates friction, replace it completely.
• The function of overload protection for pulley is described in, for example, the Self Study Program 240 Audi A2 Technical Information.
• The A/C compressor can be removed and installed at the bracket on engine without opening the refrigerant lines.

1 - 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 Catalog.
• Nut tightening specification: 25 Nm

2 - Bolt

• 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 Catalog.

3 - Drive Plate

• the overload protection (securing spring elements), takes over when the torque is excessive (for example, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C compressor.
• Drive plate spring elements damp 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.
• On 5-cylinder vehicles (Audi RS Q3), 2 belts are guided over the belt pulley.

7 - A/C Compressor

• There are different versions depending on engine installed and the market. Refer to the Parts Catalog.
• Clean A/C compressor flange before sliding on pulley.

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