Place of Origin:
China
Brand Name:
John-Deere
Model Number:
RE557897
This is a mechanical rotary distributor diesel fuel injection pump for the John-Deere 6068H and 6068T PowerTech 6.8L six-cylinder engine family. It is the machine figure RE557897 (also written RE-557897), built to pump builder figure DE2635-6237 (also written DE26356237). The pump uses a single pumping head with an internal transfer pump, mechanical governor, electric shutoff, and automatic hydraulic timing advance contained inside the pump body. It is gear driven through a keyed coupling and flange mounted.
A rotary pump on a six-litre engine is not the same component as the common rail unit fitted to the later emission version of the same model, and the two are frequently advertised side by side. This page states which generation the figure belongs to, lists the two calibrations commonly confused with it, and names the machines as well as the engine.
| Product Name | Diesel fuel injection pump, rotary distributor type |
|---|---|
| Machine Figure | RE557897, also written RE-557897 |
| Pump Builder Figure | DE2635-6237, also written DE26356237 |
| Neighbouring Calibrations | RE518088 with DE2635-5825, and RE518165 |
| Remanufactured Figure | SE501236 |
| Engine | 6068H and 6068T six cylinder, 6.8 litre class, turbocharged |
| Machines | 7420 and 7520 tractors, 200CLC excavator, 460D skidder, 2054 logger |
| Construction | One pumping head, internal transfer pump, mechanical governor, electric shutoff |
| Timing Advance | Automatic, hydraulic, inside the pump body |
| Drive | Gear driven, keyed coupling, flange mounted |
| Condition Offered | New, and rebuilt with a bench flow sheet |
| Packing | Port caps, shaft sleeve, foam blocked carton |
| Two Generations Under One Name | The mechanical version of this engine runs the rotary pump shown here, while the later emission version of the same model runs a high pressure rail, and the two share no pipework, no drive coupling and no electronic architecture. |
|---|---|
| Calibration Twin | A pump looking identical from the outside is sold under a second machine figure with a different builder figure, and it is set for a different rating of the same engine. |
| Reman Lettering | The rebuilt version carries a different prefix entirely, so a buyer searching the rebuilt figure and receiving a part marked with the new figure should check the paperwork rather than the label. |
| Smaller Engines Cross Listed | Listings put this figure against three and four cylinder engines of the same family, whose pumps have fewer outlets and a shorter body. |
| One Head, Not Six | A single rotating head distributes fuel to all six lines, so the pump cannot be repaired by replacing one element, and the head and rotor are a matched set. |
| Caution — Advance Piston | A sticking advance piston produces white smoke and poor cold starting that is regularly diagnosed as a worn pump, when cleaning and a new seal usually restores it. |
| Caution — Timing Pin | The engine is pinned at the flywheel and the pump flange marked before removal, and a pump refitted without that step will run but will not deliver its rated power. |
| Caution — Shutoff Solenoid | An engine that cranks but never fires is often the shutoff plunger held open, which takes minutes to check and is cheaper than a pump. |
| Caution — Inlet Screen | The internal transfer pump draws through a fine screen in the inlet fitting, and debris there starves the head and scores it within a short run. |
| Caution — Return Restriction | A blocked return raises case pressure, which shifts timing and makes the governor surge, so the return is proven clear before the pump is blamed. |
| Related Components | Injectors, filter head, shutoff solenoid, drive gear, delivery valve seals, return line. |
No, it is a mechanical rotary distributor pump.
No, that version uses a high pressure rail.
A different calibration for a different rating.
No, head and rotor are matched and supplied together.
The advance piston is sticking or the timing was not pinned.
No coding, but the fuel setting is bench verified.
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