75 Spectra V-Drive

[78Southwind]

We looked at it pretty good. I don't think it's the original cam just a new grid of the original cam.

edit: You can identify a genuine Crane cam core by the distinctive copper plating between the lobes.

[WESTERNAERO]

We looked at it pretty good. I don't think it's the original cam just a new grid of the original cam.

Is it a solid or hydraulic roller?
I run a hydraulic roller crane PN 139651. The number on yours is close.

[78Southwind]

Is it a solid or hydraulic roller?
I run a hydraulic roller crane PN 139651. The number on yours is close.

It's a solid roller.

[WESTERNAERO]

I wouldn't be worried about the collar. The diameter of the collar isn't large enough to have any rotating mass that would cause vibrations or anything to loosen the bolts if torqued properly and locktite is used. There's no end thrust applied to move the collar forward so that's not an issue either. If your really worried about it coming apart, assemble it, tighten the collar in place and then remove the drive and tack the two pieces of the collar together. I'm not a fan of doing something like that but it would give you the peace of mind you looking for.

[WESTERNAERO]

Do you really need the collar? You're going to shorten the splined end of the shaft, why shorten per the instructions? The PTO coupler is splined thru, so why not machine the that end so it has 1/8 - 3/16 off the end of the crank? If you chunk it up in a lathe so the face is square to the splines then there is no need for the collar. The collar is there so the shaft doesn't move too far forward and comes out of the trans. If you set the end-play to the crank, the collar is useless.

[78Southwind]

Do you really need the collar? You're going to shorten the splined end of the shaft, why shorten per the instructions? The PTO coupler is splined thru, so why not machine the that end so it has 1/8 - 3/16 off the end of the crank? If you chunk it up in a lathe so the face is square to the splines then there is no need for the collar. The collar is there so the shaft doesn't move too far forward and comes out of the trans. If you set the end-play to the crank, the collar is useless.

I wouldn't be worried about the collar. The diameter of the collar isn't large enough to have any rotating mass that would cause vibrations or anything to loosen the bolts if torqued properly and locktite is used. There's no end thrust applied to move the collar forward so that's not an issue either. If your really worried about it coming apart, assemble it, tighten the collar in place and then remove the drive and tack the two pieces of the collar together. I'm not a fan of doing something like that but it would give you the peace of mind you looking for.

Thanks...I will think this through.

[WESTERNAERO]

Thanks...I will think this through.

I think the TCI's idea with the collar is if some guy is doing this in his garage and the only thing he has is a chop saw to cut the shaft to length. The cut won't be square, but by putting that split collar on there it will provide a perpendicular shoulder for the end play. The PTO becomes part of the crank when it's bolted on. So what's the difference if the end play is set from the PTO face or inside the PTO on the crank. Hope I'm making sense here.