My 2001 s60 is in the shop getting the alternator replaced, they told me the ac unit was in the way and would have to be removed to replace the alternator. Is this correct.

Hope this helps :) :)

Generator (GEN), replacing
Removal

Preparations
-Disconnect the battery negative lead. See Battery, replacing .
Caution! When removing and installing the battery leads. See Note when disconnecting/connecting the battery lead .
Remove:
Turbo
-the air intake between the radiator and the air cleaner (ACL) housing
-the charge air pipe over the engine.
Normally aspirated and turbocharged
-the engine cooling fan (FC). See Replacing the engine cooling fan (FC)
-the charge air pipe from the cooling system
-the auxiliaries belt. See Auxiliaries belt / belt tensioner, replacing .


Removal
-Remove the screw and nut that run through the upper mounting
Applies to cars with air conditioning (A/C)
-Slacken off the lower screws for the compressor so that there is sufficient clearance to remove the generator (GEN).
-Remove the lower screws from the generator (GEN)
-Detach the generator (GEN)
-Disconnect the connector and wiring
-Lift the generator (GEN) towards the air cleaner (ACL) housing
-Turn the generator (GEN) into position so that it can be removed.

Installation

Cars without air conditioning (A/C)
-Position and lift or pull the generator (GEN) into the correct position
-Connect the connector and wiring
-Position the generator (GEN) so that the screw and nut that run through it can be installed in the upper mounting. Do not tighten
-Install the lower screws. Do not tighten
-Tighten the screw and nut that run through the upper mounting. Tighten to 25 Nm
-Carry out the remaining operations in reverse order.
Caution! When removing and installing the battery leads. See Note when disconnecting/connecting the battery lead .


Cars with air conditioning (A/C)
-Position and lift or pull the generator (GEN) into the correct position
-Connect the connector and wiring
-Position the generator (GEN) so that the screw and nut that run through it can be installed in the upper mounting. Do not tighten
-Install the lower screws. Do not tighten
-Tighten the lower screws for the compressor. Tighten to 25 Nm
-Tighten the screws common to the generator (GEN) and the compressor. Tighten to 25 Nm
-Tighten the screw and nut that run through the upper mounting. Tighten to 25 Nm
-Carry out the remaining operations in reverse order.
Caution! When removing and installing the battery leads. See Note when disconnecting/connecting the battery lead .

Thanks! yes this does help.