Removing and installing pulley - Valeo air conditioner compressor — AUDI

🧭 Before you start

Fits: Audi Q3 (8U, 2011–2018); platform code 84

• Renewed: if necessary
• Also covered elsewhere: Electronic parts catalogue

Don't miss

• If the pulley splines have become worn, bolt (B) cannot be loosened (the air conditioner compressor shaft turns with the bolt).
• If the drive plate is bonded to the air conditioner compressor shaft, press off the pulley.
• Using e.g. a thread cutter, clean threaded holes into which self-locking bolts or bolts were screwed (screwed in with locking fluid). Otherwise there is a danger of the bolts shearing off when removed again.

📋 Procedure

1. Remove poly V-belt 13Cylinder block (pulley end); Removing and installing poly V-belt.
2. To loosen bolt (B), hold pulley (A) in position with a commercially available strap wrench (with fabric strap). [Note: If the pulley splines have become worn, bolt (B) cannot be loosened (the air conditioner compressor shaft turns with the bolt).]
3. If pulley splines are worn, unscrew bolts (C).
4. Fit washer (A) with flat side facing outwards.
5. Secure drive plate with washer (A) from repair set1K0 898 814 on air conditioner compressor shaft by fitting washers (B) and tightening bolts (C).

6. Remove bolt (D).
7. Detach washer and drive plate. [Note: If the drive plate is bonded to the air conditioner compressor shaft, press off the pulley.]
8. Screw long bolts (C) through holes in drive plate (A) into pulley (D).
9. Use a commercially available M8 bolt (B) (strength class min. 10.9) to press drive plate (A) off air conditioner compressor shaft; at the same time, counterhold pulley (D) with a commercially available strap wrench (with fabric strap). [Note: If the drive plate (A) has already been renewed at the workshop and the new drive plate was fixed in position on using sealant, it may be so firmly attached to the air conditioner compressor shaft that it can no longer be pressed off. In this case the air conditioner compressor must be renewed as a complete unit.]
10. Remove circlip and detach pulley.
11. Check splines of drive shaft (B) of air conditioner compressor and splines of drive plate (C) for wear and renew if necessary.
12. ⚠ Do not use compressed air when cleaning; blowing out could cause dirt particles to settle on the seal of the air conditioner compressor shaft and damage it. — Use a commercially available cleaning solution to remove rust, abrasion, old adhesive and other particles from splines of air conditioner compressor drive shaft (B), pulley (A) and splines of drive plate (C).
13. Using e.g. a thread cutter, clean threaded holes into which self-locking bolts or bolts were screwed (screwed in with locking fluid). Otherwise there is a danger of the bolts shearing off when removed again.
14. Using wire brush, clean threads of bolts screwed in with locking fluid.
15. Attach pulley to air conditioner compressor drive shaft and fit circlip.
16. Apply thin coat of sealant to splines of air conditioner compressor drive shaft (B) and splines of drive plate (C). For sealant, refer to Electronic parts catalogue. [Note: Make sure sealant does not come into contact with the seal for the air conditioner compressor drive shaft (in the air conditioner compressor).The sealant is also an adhesive. After it has dried, the drive plate can no longer be detached.After applying the sealant, the drive plate must be fitted within 5 minutes and the bolts tightened to the specified torque.]
17. Slide drive plate onto air conditioner compressor drive shaft.
18. Tighten bolts (B and C) to torque.
19. ⚠ Risk of irreparable damage to air conditioner compressor.After fitting the drive plate, wait 1 hour before starting the engine to ensure that the sealant has the necessary strength. — Install poly V-belt 13Cylinder block (pulley end); Removing and installing poly V-belt.

Other AUDI procedures

• Removing and installing toothed belt – Audi · 56 torque figures
• Removing engine – Audi A8 D3 · 41 torque figures
• Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
• Installing engine – Audi A8 D4 · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures
• Checking operation of solar roof – Audi A6 C6
• Removing and installing refrigerant pipe (B) (from connection at condenser to screw connection in refrigerant pipe)
• Injection and ignition system (8-cyl. 5-valve injection engine) — Removing and installing Lambda probes
• Removing and installing selector lever lock solenoid N110 on vehicles from 11.2005 onwards
• Adjusting selector lever cable on vehicles from 11.2005 onwards