The plunger features a helical groove (scroll). When this helix uncovers the spill port in the barrel, pressure drops instantly, ending the injection cycle. Maintenance and Lubrication
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Flush governor housing with clean oil; Inspect governor linkage for play. bosch pes4a manual
Before performing any maintenance or calibration, you must correctly identify your specific pump model using the Bosch data plate located on the pump housing. Decoding the Model Number (e.g., PES 4 A 70 C 410 RS2083) : In-line injection pump with an enclosed camshaft. S : Flange mounting (rigid mounting to the engine block). 4 : Number of cylinders / high-pressure outlets.
Remove the dipstick or breather cap on top of the governor/pump housing. The plunger features a helical groove (scroll)
Whether you are dealing with a
Cut off the air supply to the engine immediately to stop it. Free the stuck rack and clean the housing. Before performing any maintenance or calibration, you must
Driven by the engine timing gear to control injection timing.