Place of Origin:
China
Brand Name:
Komatsu
Model Number:
0445020070
This CP1 common rail high pressure pump serves the four cylinder SAA4D95LE-5 3.3 litre engine fitted to the Komatsu PC60-8, PC70-8, PC120-8, PC130-8, PC138US-8, PC88MR-8 and PC118MR-8 excavators. Four reference figures travel with this unit — a machine maker figure, a pump maker figure, a pump maker rebuild figure and an engine maker figure — and this page maps all four together so buyers can match whichever number their own parts book shows.
| Product Name | Common rail fuel injection pump, CP1 family |
|---|---|
| Machine Figure | 6271-71-1110, written 6271711110 without dashes |
| Pump Maker Figure | 0445020070, and 0986437082 for the rebuilt unit |
| Engine Maker Figure | 4941173, quoted for the same pump on the three point three litre engine |
| Engine | SAA4D95LE-5 four cylinder, three point three litre |
| Excavator Fitment | PC60-8, PC70-8, PC120-8, PC130-8, PC138US-8, and the short tail PC88MR-8 and PC118MR-8 |
| Neighbouring Build | 6275-71-1120 with 294000-1790 serves a different four cylinder build and does not interchange |
| Control | Inlet metering valve on the low pressure side, rail pressure closed loop through the controller |
| Condition Offered | New, and rebuilt with a bench pressure report |
| Packing | Port caps fitted, valve protected, foam blocked carton |
| Four Figures, Three Companies | A machine maker figure, a pump maker figure, a pump maker rebuild figure and an engine maker figure all describe this unit, and a quotation that answers only one of them looks incomplete to the buyer. |
|---|---|
| Pressure Family | This is the small bore rail pump of the family, not the larger series used on six cylinder engines, and the two are quoted interchangeably by sellers who never opened either. |
| Two Engine Names | The same three point three litre block is sold under a machine maker name and under a western engine maker name, and the pump carries a figure for each. |
| Mechanical Predecessors | Earlier builds of this engine used an in line mechanical pump, and the earlier machine designations are still in service, so the model number alone proves nothing. |
| Neighbouring Four Cylinder Build | A second rail pump exists for a different build of the same engine, and its figure shares the first four digits with this one. |
| Large Machine Trap | Larger machines of the same series use a six cylinder engine and a completely different pump, and the model prefix does not tell them apart. |
| Caution — Rail Flush | Debris from a worn pump reaches the rail and all four injectors, so the rail, pipes and tank are cleaned before the replacement runs. |
| Caution — Leak Off | Injector return flow is measured first, because excess leak off gives the same low power and hard start complaint. |
| Caution — Metering Valve | The inlet valve belongs to the calibration, and a valve from another build produces a rough idle and a pressure code. |
| Caution — Coupling Key | The drive coupling is keyed and the flange marked, and a gear one tooth out cranks without firing. |
| Caution — Water Passage | Water reaching the pumping elements is the usual reason a replacement fails inside a season, so the separator is serviced with the pump. |
| Related Components | Injectors, rail, pressure sensor, metering valve, high pressure pipes, filter and separator. |
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