We have replaced the A/C compressor 3 times in the last 3 months. on 2004 GMC Yukon

We have replaced the compressor 3 times and the clutch n pulley keep breaking??? I have a certified mechanic working on it and he is baffled. Help!!! we have blown out all the lines and such and it last a week or so then shells out.

by in Tenaha, TX on May 22, 2014
1 answer 2 comments
ANSWER by , May 22, 2014
Has he flushed everything, changed the orifice and expansion valve. Is the condenser clear or restricted? Is the pressure switch working. Just trying to get a little more info.
COMMENT by , May 22, 2014
the oriface has been changed and it was flushed out yes. yes it is clear and the pressure switch is working.
COMMENT by , May 22, 2014
Where is it breaking, clutch hub bolt, pulley bearing hub breaking off compressor, how is it breaking.