2.8l AC Idler Pulley

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• Carl Steven

  Member

  2016-09-18 at 15:53

  Post count: 27

  #12447

  I hope somebody can help me out with this as it is driving me crazy.  I have a 1987 Volvo 780 with the 2.8 L V6 engine in it.  I need to replace the smaller idler pulley associated with the AC drive belt.  I have been completely unable to locate a new one anywhere.  If push comes to shove, I might have to use the existing one and press in a new bearing but Zi’d prefer to buy a whole new assembly if Zi can.

  For those of you familiar with it, there are two idler pulleys for the AC belt drive system on the V6 780 and I’m sure on the V6 760 of the same era.  The larger of the two pulleys has an adjusting screw to put tension on the belt – that pulley doesn’t seem too hard to get.  The pulley I need is the smaller of the two.  The belt just rides over it.  It is not adjustable.  Sorry but I don’t know the part number.  It’s frustrating that this is so hard to find.

   

  thanks for any help,

   

  Carl

  Lager

  Member

  2016-09-19 at 11:42

  Post count: 114

  #12449

  Have you tried to search for the part number : http://www.volvooemparts.com . You will find the part number from there. After that it is much easier to find the part.

  http://www.volvooemparts.com/a/Volvo_1987_78028l-Fuel-Injected2DRS-SR/_51956_5703088/Compressor-compressor-mountings-compressor-driving-6cyl-6cyl-1987-/GR-42612.html

  http://www.volvooemparts.com/a/Volvo_1987_78028l-Fuel-Injected2DRS-SR/_51956_5699469/Compressor-compressor-mountings-compressor-driving-4cyl/GR-58078.html

  Carl Steven

  Member

  2016-09-20 at 17:44

  Post count: 27

  #12453

  Thank you Lager for the references.  As it turns out, I called a Volvo dealer who informed me that the bearing assembly is no longer available from the dealer.  When it was available the the list price was $145 USD.  So, I decided to pursue my Plan “B”.  I pressed out the internal busing in a vice (it was in there very tight) and pressed it into a new replacement bearing that was only about $7 or so.  In my car the failure of that bearing was the result of the whole A/C system going down.  Given the task it is asked to perform, I’m surprised replacement of this small bearing isn’t a regular maintenance item.

  Carl

  dn010

  Participant

  2016-09-22 at 10:49

  Post count: 106

  #12456

  All of the AC pulley bearings can be replaced, including the one that is riveted together. The bearings, in the US, are readily available and used on a wide variety of vehicles and equipment. They are “6202” bearings if you’re searching for them. Stay away from anything Chinese made or you’ll find yourself replacing them quite often as they fail quickly.

   

  For the idler that is riveted- cut the rivet heads off, use a punch and hammer to drive the rivet bodies out, separate the pulley halves, press the old bearing out and a new bearing in, and rivet it back together with a nice, strong rivet. Be careful not to warp the halves if you use a vice instead of an actual press.

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