I am struggling with the same problem on the wife's '79 TD. I found some good articles by George Murphy in your archives. The articles include test procedures
http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20071023/8f4 e87a1/attachment.pdf http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20071023/8f4 e87a1/attachment-0001.pdf Greg Fiorentino '85 300SD '80 240D 4 spd. manual '79 300DT (with new crate engine) '95 and '97 Crown Vics -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Douglas Sent: Sunday, February 15, 2009 1:30 AM To: Mercedes Discussion List Subject: [MBZ] 1980 300D Climate Control. Yes I have been for the last.. ahh. 2 years working on my climate control. Yes its the hated servo. It seems that it works intermintently and when it fails its stuck on heat. I have several amps and have cycled them all with the same result. The system works for a few days that goes to all heat. It seems that when I test the servo by using a 9 volt battery to drive the little motor, then connect the amp all works for a few days then all heat. Now I am thinking that somehow the servo motor does not have enough lubrication and is STUCK. and while in normal mode with the amp it only gets like maybe 4 Volts. Then when I put the 9 Volts to it. the servo frees up! So my question is .. how do I test this I do know the amp works correctly. I have put a meter on the servo.. and run it through the cycle heat and cool. Just was thinking do this test while its not working.. to make sure its on the ball. I know you all hate this system. yes me to it sucks .. though am not ready to throw. $800 for the digital. plus I have been working on this for so so long!.. Any Ideas.. will be taken.. thanks Douglas -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20090215/0e 4bcb40/attachment.html> _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
