We got a new one and it was already primed when we got it (I think so at least, based on the fluid in the bag that it was wrapped in). We had it repainted though and now I'm wondering if I need to do it again. Thanks!

Mike

DU302 in all likelihood the fluid in the bag was just assembly lube, not to be construed as priming fluid.

When you get the pump mounted and all together fill the resevoir to the normal level and start your engine. Cycle the steering wheel a few times to get the lines and sector filled, shut off the engine and top off the resevoir again as necessary. During this time you will note a whining noise as the pump pumps out the air contained in the system. This is normal and will slowly disappear as the entire system becomes purged of air. Finally when all is quiet and you are obviously getting steering boost from the system top off the resevoir once again as necessary.

Good luck http://www.chevelles.com/forum/smile.gif

You should try to get as much air out of the power steering system as you can before you start your engine. It helps if you have the front wheels off the ground so that you can manually turn the steering wheel lock to lock at least a half dozen times. Check the fluid level in the pump reservoir and replenish to the "full cold" mark on the capstick.
Now when you lower the front end and start your engine there may still be a small amount of air that will be flushed through the pump. The vanes inside the pump will whip the remaining air into a froth. That is why the fluid may appear somewhat milky. A brief drive of about 10 miles should get the rest of the air to work its way out of the fluid. Recheck the fluid level after the drive.

If you have a lot of air in your system when starting the engine you may find that your pump makes very loud noises and power assist can also be somewhat erratic until the air works its way out.

Drawing a vacuum on the system to draw the air out is the best procedure but it is not really necessary.

If you have a chassis service manual, it spells out exactly how you should do it. If you go by the book there are several steps involved, but all very simple.

Chop

The book basically says;
-fill pump and let stand for at least 2 minutes.
-run motor for 2 seconds at a time till resevoir remains full.
-jack up car and turn wheel lock to lock a few times.
-put car on ground and turn wheels lock to lock a few times.

Raise engine rpms as necessary during the turning steps. Of course, also add oil as necessary during each of these steps (check with engine off or course).

Peter

Thanks guys!