Komatsu PC1250-8 Excavator Cylinder Head (#511700-) Parts
Komatsu PC1250-8 cylinder head (#511700-) parts for machine serial 30158-UP. View this configuration's diagram, part numbers, quantities and options; shop or request a quote.
Catalog configuration: SAA6D170E-5C SN 511700-UP (For PC1250-8/PC1250LC-8/PC1250SP-8) / Engine Cylinder Head And Its Related Parts / Cylinder Head / Cylinder Head (#511700-).
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Aftermarket parts reference illustration · Click to enlarge. Actual supplied parts may differ.
Assembly parts
Showing all 35 part occurrences
Select any parts and adjust quantities. Store products go to your cart; parts without a store match go into a quote request. Each button handles only its matching selections.
| Line | Part number | Description | Qty | Order qty | Purchase options | |
|---|---|---|---|---|---|---|
| 0 | Cylinder Head AssemblySN: 511700-UP | 6 | Request quote | |||
| 2 | Insert, Intake Valve, StandardSN: 511700-UP | 2 | View product ↗ | |||
| 2 | Insert, Intake Valve, Oversize 1.00mmSN: 511700-UP | 2 | Request quote | |||
| 2 | Insert, Intake Valve, Oversize 0.75mmSN: 511700-UP | 2 | Request quote | |||
| 2 | Insert, Intake Valve, Oversize 0.50mmSN: 511700-UP | 2 | Request quote | |||
| 2 | Insert, Intake Valve, Oversize 0.25mmSN: 511700-UP | 2 | Request quote | |||
| 3 | Insert, Exhaust Valve, StandardSN: 511700-UP | 2 | View product ↗ | |||
| 3 | Insert, Exhaust Valve, Oversize 1.00mmSN: 511700-UP | 2 | Request quote | |||
| 3 | Insert, Exhaust Valve, Oversize 0.75mmSN: 511700-UP | 2 | Request quote | |||
| 3 | Insert, Exhaust Valve, Oversize 0.50mmSN: 511700-UP | 2 | Request quote | |||
| 3 | Insert, Exhaust Valve, Oversize 0.25mmSN: 511700-UP | 2 | Request quote | |||
| 4 | Guide, ValveSN: 511700-UP | 4 | View product ↗ | |||
| 5 | Tube, Push RodSN: 511700-UP | 1 | Request quote | |||
| 6 | O-ringSN: 511700-UP, KIT-FLAG: S | 1 | Request quote | |||
| 7 | PlugSN: 511700-UP | 3 | View product ↗ | |||
| 8 | Plug, ExpansionSN: 511700-UP | 17 | View product ↗ | |||
| 9 | Plug, BoltSN: 511700-UP | 1 | Request quote | |||
| 10 | PlugSN: 511700-UP | 1 | View product ↗ | |||
| 11 | Guide, CrossheadSN: 511700-UP | 2 | Request quote | |||
| 12 | Pin, DowelSN: 511700-UP | 2 | View product ↗ | |||
| 13 | Plug, TaperSN: 511700-UP | 1 | View product ↗ | |||
| 14 | Seal, Valve StemSN: 511700-UP, KIT-FLAG: S | 24 | View product ↗ | |||
| 15 | Valve, IntakeSN: 511700-UP | 12 | View product ↗ | |||
| 16 | Valve, ExhaustSN: 511700-UP | 12 | View product ↗ | |||
| 17 | Spring, ValveSN: 511700-UP | 24 | View product ↗ | |||
| 18 | Cotter, ValveSN: 511700-UP | 48 | Request quote | |||
| 19 | Seat,UpperSN: 511700-UP | 24 | View product ↗ | |||
| 20 | Seat,LowerSN: 511700-UP | 24 | View product ↗ | |||
| 21 | CrossheadSN: 511700-UP | 12 | Request quote | |||
| 22 | Screw, AdjustingSN: 511700-UP | 12 | Request quote | |||
| 23 | Nut, LockSN: 511700-UP | 12 | View product ↗ | |||
| 24 | Bolt, HeadSN: 511700-UP | 42 | Request quote | |||
| 25 | BoltSN: 511700-UP | 12 | View product ↗ | |||
| 26 | Gasket Assembly, StandardSN: 511700-UP, KIT-FLAG: S | 6 | View product ↗ | |||
| 26 | Gasket Assembly, Oversize 0.4mmSN: 511700-UP | 6 | View product ↗ |
Repeated parts remain separate. Source order is retained; diagram callout mapping has not yet been verified.
Assembly notes
Head, Cylinder
Grommet, Water
Grommet, Water, Oversize 0.4mm
Grommet, Water
Grommet, Water, Oversize 0.4mm
Grommet, Water
Grommet, Water, Oversize 0.4mm
Grommet, Oil
Grommet, Oil, Oversize 0.4mm
Grommet, Oil, Standard
Grommet, Oil, Oversize 0.4mm
Using Komatsu PC1250-8 Excavator Cylinder Head (#511700-) Parts
Use the Komatsu PC1250-8 Excavator Cylinder Head (#511700-) Parts listing to identify aftermarket replacement parts within the engine cylinder head and its related parts section. This excavator application is listed for machine serial 30158-UP; the diagram and parts table retain the selected configuration and its source notes.
The parts table contains 35 listed part occurrences, including cylinder head assembly (reference 6245-11-1100), insert, intake valve, standard (reference 6240-11-1330) and insert, intake valve, oversize 1.00mm (reference 6240-16-1330). Read any option and reference notes beside these entries before choosing a replacement; repeated references may represent separate positions in the source list.
The source engine application is SAA6D170E-5C (engine serial 511700-UP). Match that engine identification as well as the machine serial range; the general machine model is not a substitute for engine-specific applicability.
For cylinder-head and related engine parts, follow the applicability attached to the selected assembly. Gaskets, fasteners and other components must be checked by their listed references rather than assumed to interchange between engine versions.
Catalog quantities describe the illustrated assembly. Adjust the order quantity to what you need, select the relevant rows, and use Add selected to cart for verified store matches or Add selected to quote for quote items. The diagram alone does not establish current stock or part interchangeability.
