Cylinder carries Tamco/Toku part number Y10113180 and is stocked here under TK-Y10113180. It carries the piston and the port timing for the rock drill. Bore wear is gradual, so it is usually diagnosed by falling performance rather than a breakdown.
You will find it on the diagram for the THD 1100N Rock Drill and THD 1100U Rock Drill (CP9A). Worth matching the reference number on the diagram against your own machine before you order the same part number can sit in more than one position.
If you need the parts around it, the full diagram library has the full breakdown library, and the Tamco/Toku lineup covers the machines themselves. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: Y10113180
- Manufacturer: Tamco/Toku
- Crowder SKU: TK-Y10113180
- Listed on breakdowns for: THD 1100N Rock Drill, THD 1100U Rock Drill (CP9A)

