Compressor Pulley: Description and Operation
A/C Compressor Belt Pulley, Sanden
• Observe notes for removing belt pulley for compressor manufactured by Denso version 1, these also apply to this A/C compressor => [ Belt Pulley, Denso Version 1 ] Belt Pulley, Denso Version 1
• Perform any preliminary work as described for removing belt pulley on compressor manufactured by Denso version 1. Refer to => [ Preparation ] Belt Pulley, Denso Version 1.
• The A/C compressor belt pulley is available in different versions, belt pulley version 1 is installed on A/C compressors with part number 1K0 820 803 up to index Q, belt pulley version 2 is installed on A/C compressors with part number 1K0 820 803 as of index S (running change as of December 2005). Refer to Electronic Parts Catalog (ETKA).
Replacing Belt Pulley Version 1
1 Hex Head Nut
• Tightening specification: 25 Nm
• 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 (e.g. with D 000 600 A2). Refer to Electronic Parts Catalog (ETKA).
2 Screw
• Tightening specification: 4.5 Nm
• To loosen and tighten bolts, hold belt pulley firmly in place using a standard band wrench (with webbing).
• 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 Electronic 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 (damps vibrations and noise).
4 Washer
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 circlip, note that it cannot be bent open more than is necessary for installation.
6 Belt Pulley
• Clean A/C compressor flange before sliding on pulley.
7 A/C Compressor
• Different versions may be installed, depending on engine version and country version of vehicle. Refer to Electronic Parts Catalog (ETKA).
• Clean A/C compressor flange before sliding on pulley.
Replacing Belt Pulley Version 2
• From MY 2008, for cold climate vehicles (for example, central and north Europe), compressors with a smaller stroke installed; on these 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 Electronic Parts Catalog.
1 Hex Head Nut
• The A/C compressor shaft may be covered with a plastic cap to protect the threads on it (the plastic cap is not illustrated).
• Nut tightening specification: 25 Nm.
• 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 nut/bolt with thread locking compound (for example, D 000 600 A2). Refer to the Electronic Parts Catalog.
2 Screw
• Tightening specification: 12 Nm
• To loosen and tighten bolts, hold belt pulley firmly in place using a standard band wrench (with webbing).
• 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 Electronic 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 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 circlip, note that it cannot be bent open more than is necessary for installation.
5 Belt Pulley
• 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).
• The threaded plates - C - can also be connected to each other by a ring, depending on the version.
6 A/C Compressor
• Different versions may be installed, depending on engine version and country version of vehicle. Refer to Electronic Parts Catalog (ETKA).
• Clean A/C compressor flange before sliding on pulley.