Scott - Same problem here. I just replaced both sets of lifters in my HP500's due to the same crimp problem. Approx. 250 hours total run time. Luckily we caught it while replacing valve springs and were ahead of a complete failure.Originally posted by Scott
When I pulled mine apart (same problem BTW) I found that you could push the pin that holds the roller and bearings in out with your finger. I only found this on one motor not the other and heard spomething about a bad batch with a crimp problem. This is NOT confirmed. All I know is that I had to change all of them.