American Powertrain Hydramax Question

[tazimm]

I was bleeding my American Powertrain HRB this weekend and while looking at it actuate something looked wrong.

Question for someone who has used this bearing... Is the entire bearing assembly supposed to move (bleeder and pressure line)? The blue anodized plate is moving in and out to actuate the clutch. It seems to me that plate should be seated against the transmission/shims and just the bearing on the front should move? It also looks like the blue plate isn't against the shims, the sleeve from the inside is pushing it away? Here is a crummy picture, best I could take without my scope. The silver you see behind the blue plate isn't the shims, it is a tube that is pushing against the shims???



I purchased this a few years back, it is a t56 on a LS motor. The bearing did come apart while I was measuring for shims, I put it back together, wonder if this is how it is supposed to work, or if I broke something? It actually seems to be working to release the clutch just not sure it is working right.

Any input would be appreciated!!!



Thanks!

[rj8806]

Yes the housing is going to move back and forth with the bearing actuation, that is normal. The bearing is designed to come apart as well as it is a rebuildable bearing and there are rebuild kits available for it. If it came apart during the bleeding process then the bearing was positioned too far away from the fingers. You need .150" -.200" final answer after you take A - B according to the instructions. Being that you are working on a GM, their instructions call for you to take A - B = C - .150 / .090 = final answer... Basically, take A - B = C. If C falls anywhere between .100 and .200 you are good to go (yes I know the instructions say .150 to .200 but trust me. as I no longer do tech support for them, I did sleep in a Holiday Inn Express last month...just kidding. I did tech support there for 6 years). If your answer "C" is less than .100, stop and call them as you need to space the transmission back off the bell as you are too close and if the "C" is greater than .200 THEN you need to take that answer - .150 and then / .090 to get the amount of shims needed. NOTE...since the .090 shims stacked on each other don't equal .090 every time (2 shims are not exactly .180, 3 shims not exactly .270 etc...) once you get the number of shims needed by the math, double check the A - B numbers again (well, just the "B" number is going to change with the shims) and run the numbers again to make sure you are in spec. Hope this helps

Richard

[tazimm]

Richard, thanks for the response. My biggest concern was that the whole assembly was moving, and you clarified that is normal. Otherwise everything seems to be working (after the pita it was to get the air out of the lines). My bearing coming apart was during mockup, not bleeding. It isn't leaking or anything now that it is assembled and I didn't have any issues with it after bleeding.

Thanks - Scott