OEM Bucket Cylinder for Komatsu PC4000 (ref. 992 310 40)
A bucket cylinder is the hydraulic actuator that curls the bucket to generate breakout force during digging. 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: Bucket Cylinder, new replacement for Komatsu PC4000
- Komatsu OEM ref.: 992 310 40 (also written 99231040)
- Interchangeable references: 8 additional Komatsu numbers (listed below), incl. 990 003 40, 989 970 40
- Fits: Komatsu PC4000 (mining excavator)
- Condition: New, to OEM specification
- HD Mining Parts SKU: KMP-BC-1N2V5S
- 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This part is interchangeable with the following Komatsu reference numbers (including superseded and alternative references) and can be supplied in place of any of them.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:
- 990 003 40 / 99000340
- 989 970 40 / 98997040
- 982 210 40 / 98221040
- 973 800 40 / 97380040
- 962 435 40 / 96243540
- 947 150 40 / 94715040
- 931 555 40 / 93155540
- 927 990 40 / 92799040
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 992 310 40?
It is the bucket cylinder for Komatsu PC4000; HD Mining Parts supplies a new replacement under SKU KMP-BC-1N2V5S.
Is 990 003 40 interchangeable with 992 310 40?
Yes, 990 003 40 (99000340) is an interchangeable Komatsu reference for this bucket cylinder and can be replaced by it.
Request Komatsu OEM ref. 992 310 40, or browse all Hydraulic Cylinders and Komatsu PC4000 spare parts, or request a quotation.