Ordering by number: this is 430126E50, the Tamco/Toku piston. It is the working heart of the rock drill. Pistons are matched to the cylinder bore, so replacing a worn one usually means checking the bore at the same time.
Crowder’s breakdowns list this part on the TJ 20 Rock Drill (RD 40). The complete machine is the Tamco/Toku TJ-20 Rock Drill. Compare it to the reference callout on the diagram to be sure it is the position you need.
Everything else on that machine is one page away, and the full diagram library indexes every breakdown we publish. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 430126E50
- Manufacturer: Tamco/Toku
- Crowder SKU: TK-430126E50
- Listed on breakdowns for: TJ 20 Rock Drill (RD 40)
