Hydraulic Piston Rotating Group
The rotating group of a piston pump is comprised of a cylinder barrel that is rotated by a shaft; seven or nine pistons installed in the cylinder block with brass shoes attached. As the cylinder block turns the pistons travel in and out of the bore of the block. This is how the flow is generated. During service it is suggested that if pistons are to be replaced all should be changed. At CTP, we sell all these parts individually or as a complete group. These groups are listed below:
| wdt_ID | Engine Model/Application | Barrel Part No. | Piston Part No. |
|---|---|---|---|
| 1 | 345B, 385C, 120H, 143H | 1559136 | 1559112 (9) |
| 2 | 120H, 135H, 140H | 1588966 | 2959689 (9) SET |
| 3 | 12G, 130G, 140G | 9J8660 | 8J2022 (9) |
| 4 | 12G, 14G, D6H | 9T7774 | 9T7765 (9) |
| 5 | 14G, 16G, 225, 245 | 9J2417 | 1U2738 (9) |
| 6 | D8R, D9R | 9T8448 | 9T8452 (9) |
| 7 | 215, 215B | 9J3522 | 8J2037 (9) |
| 8 | 225B, 793D | 9T3370 | 9T3371 (7) |
| 9 | 307C, 4M40 | 1949987 | 1076666 (9) SET |
| 10 | 318B | 1709959 | 1858979 (9) SET |
* Other part no. not included in the list are available. Please contact your sales representative if you have any questions. Part Numbers are used for reference purposes only. Komatsu® is the registered trademark of Komatsu Ltd. John Deere® is the registered trademark of John Deere Company.
