OEM Boom Cylinder for Komatsu PC4000 (ref. 992 300 40)
A boom cylinder is the hydraulic actuator that raises and lowers the boom, providing the primary lifting force of the working equipment. Cylinders typically wear at the rod seals and the chrome-plated rod surface; internal leakage shows up as cylinder drift or slow movement, and contamination or rod scoring accelerates seal wear.
Key facts
- Part: Boom Cylinder, new replacement for Komatsu PC4000
- Komatsu OEM ref.: 992 300 40 (also written 99230040)
- Interchangeable references: 8 additional Komatsu numbers (listed below), incl. 990 001 40, 989 960 40
- Fits: Komatsu PC4000 (mining excavator)
- Condition: New, to OEM specification
- HD Mining Parts SKU: KMP-BC-1N2UE0
- Supplied by: HD Mining Parts (worldwide export, quote-based)
Interchangeable reference numbers
This part is interchangeable with the following Komatsu reference numbers (including superseded and alternative references) and can be supplied in place of any of them. Each is shown with and without spaces:
- 990 001 40 / 99000140
- 989 960 40 / 98996040
- 979 590 40 / 97959040
- 973 805 40 / 97380540
- 962 433 40 / 96243340
- 960 230 40 / 96023040
- 931 545 40 / 93154540
- 927 980 40 / 92798040
Each part is matched by reference number and technically verified before dispatch, with traceable sourcing and export-ready delivery; availability and lead time on request.
Frequently asked questions
What part is Komatsu OEM number 992 300 40?
It is the boom cylinder for Komatsu PC4000; HD Mining Parts supplies a new replacement under SKU KMP-BC-1N2UE0.
Is 990 001 40 interchangeable with 992 300 40?
Yes, 990 001 40 (99000140) is an interchangeable Komatsu reference for this boom cylinder and can be replaced by it.
Request Komatsu OEM ref. 992 300 40, or browse all Hydraulic Cylinders and Komatsu PC4000 spare parts, or request a quotation.