7040 Piston Ring Compressor Tool+Adapter+Anti-Polishing Ring For Cummins ISX/QSX, Caterpillar 3400, C-15 5.4" bore Alternative PT-7040 5394454 5299448 5299447 5299339 (4 PCS)

very pleased ,

Very good quality and fits perfectly. A great value !

Works fines better one one than the other but made 3406b pistons in new liners easy

Anti-polish ring adapter out of round and wouldn't fit the liners, the removal tools (giant snap rings) were shoved inside the adapter and had left gouges, ring compressor too tight not to mention the fit and finish on the machining was pretty poor, had to spend a few hours in a process of polishing and test fitting to make everything work but eventually it got the job done. Would have been worth it to me to purchase the OEM tooling with what I lost in labor time, but if you have the time and patience to work with this tooling it'll get you there eventually

This is the biggest piece of junk. It comes with the rings stuffed inside the anti polish ring adapter and damaged it. The compressor it’s self doesn’t even compress the rings enough for them to start inside the anti polish ring adapter. As a matter of fact the adapter is a good .100 of an inch smaller and you will break every oil control ring you have trying to make it work.

The compression rings were shoved inside the adapter which scratched and burred the inside of the adapter. I had to do some light machining by stoning it down so when I put the new rings in my engine, they do not get broken , scratched or burred. This can not happen or the engine will get destroyed. Bad packaging. I didn't take a picture of this I was so frustrated to pay the amount I did for it.

It squeezes a little too tight on the piston rings

Worked as designed