Compressor HVAC: Service and Repair
Magnet clutch AC-compressor, replacing
Special tools:
999 5596 Counterhold 999 5596 Counterhold
999 5597 Puller 999 5597 Puller
999 5598 Puller 999 5598 Puller
999 5599 Socket with ring 999 5599 Socket With Ring
999 5600 Socket with ring 999 5600 Socket With Ring
999 5602 Tool kit - repl. shaft seal Sanden comp. 999 5602 Tool Kit - Repl. Shaft Seal Sanden Comp.
999 7193 Counterhold 999 7193 Counterhold
Note! The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.
Preparatory work
Warning! Follow the safety instructions for work on air conditioning systems. See: Refrigerant, safety regulations Technician Safety Information.
Note! First read the instructions covering slow and fast leaks.
Note! When replacing a compressor, always replace the O-rings in pipes and quick-release connectors.
Note! Always plug the pipes and connections when working on the climate control system.
Disconnect the battery negative cable. See: Battery, disconnecting Battery Disconnecting.
Preparatory work
Drain the refrigerant from the system. See Refrigerant, draining Refrigerant, Draining.
Removal
Removing the auxiliaries belt
Remove the auxiliaries belt from the AC-compressor. Service and Repair
Removing AC-compressor
Note! The AC-compressor is removed from below.
Loosen the screws, 2 pcs., for the AC-compressor's low and high pressure connections.
Removing the splash guard
Note! Install the front lift arms so that they do not block the sub-frame's support panels.
Raise the vehicle.
Loosen the protective cover under the engine by removing the screws, 7 pcs.
Remove the screws, 2 pcs., for the front protective cover.
Press in the catches in the cover's front edge and then pull backward.
Remove the screw, 1 pc. for the cable channel and loosen the cable channel from the sub-frame.
On certain versions: remove or loosen the control module box's air channel from the sub-frame.
Remove:
- the low and high pressure hoses from the AC-compressor and fold them aside
- the connector for the AC-compressor's magnet clutch
- the screws, 4 pcs., from the AC-compressor.
Hold aside the cable channel and remove the AC-compressor by extracting it between the sub-frame and body.
Removing the drive plate
Loosen the screw, 1 pc., for the drive plate using a counterhold: 999 5596 Counterhold 999 5596 Counterhold.
Loosen the drive plate using a puller: 999 5597 Puller 999 5597 Puller.
Note! Keep the shims.
Removing the pulley's lock ring
Remove the snap ring.
Removing the pulley
Pull off the pulley with a puller: 999 5598 Puller 999 5598 Puller and sleeve: 999 5599 Socket with ring 999 5599 Socket With Ring.
Removing the solenoid coil
Remove the magnet coil.
Installation
Installing the solenoid coil
Install the screws, 3 pcs. for the new solenoid coil. Tighten with 5 Nm.
Installing the pulley
Install the new pulley with a puller: 999 5598 Puller 999 5598 Puller and sleeve: 999 5600 Socket with ring 999 5600 Socket With Ring.
Note! Install the tools behind the AC-compressor brackets.
Installing the snap ring
Install the lock ring.
Installing the drive plate
Install the shims.
Install:
- the drive plate
- the screw, 1 pc., using a counterhold: 999 7193 Counterhold 999 7193 Counterhold and tighten with 13 Nm.
Checking the clearance
Check the clearance between the turning plate and the pulley using a feeler gauge.
The clearance shall be 0.3-0.5 mm.
0.3 mm clearance all the way round
0.6 mm shall not go in anywhere.
If the clearance is not within given values, replace shims.
The following dimensions are available:
0.2 mm
0.3 mm
1.0 mm.
Installing the air conditioning (A/C) compressor
If necessary, top up with oil in the AC-compressor. See applicable specifications.
Hold aside the cable channel and install the AC-compressor by inserting it between the sub-frame and body.
Install the screws, 4 pcs. M8, for the AC-compressor and tighten.
Note! Always use new O-rings lubricated with compressor oil.
Install:
- AC-compressor's low and high pressure hoses. On certain vehicle models, it may be easier to install and tighten the screws from above
- the magnetic clutch connector.
Install the cable channel on the sub-frame and bolt it down.
On certain versions the air channel is installed on the control module box and then on the sub-frame.
Installing the auxiliaries belt
Install the auxiliaries belt on the AC-compressor. Service and Repair
Installing the battery negative cable
Fit the battery's negative cable in accordance with: Battery, disconnecting Battery Disconnecting.
Refrigerant and leak detection
Vacuum pump side.
Fill the system with refrigerant. See: Refrigerant, filling Refrigerant, Filling.
Check the system for leaks: Leak tracing, fluorescent tracing agent / UV lamp Leak Tracing, Fluorescent Tracing Agent / UV Lamp or according to: Leak tracing, electronic leak tracer Leak Tracing, Electronic Leak Tracer.
Installing the splash guard
Install:
- the catches in the protective cover's front edge and press forward
- the screws, 2 pcs., for the front protective cover.
Finishing
Installing the splash guard
Install:
- the protective cover under the engine
- the 7 screws, and tighten.
Lower the vehicle.