Hp4 Supply Pump Operation Diesel Engine Troubleshooting Hp4 supply pump operation. • the fuel is suctioned by the feed pump from the fuel tank and sent to the scv. at this time, the regulating valve adjusts the fuel pressure to below a certain level. the fuel sent from the feed pump has the required discharge quantity adjusted by the scv, and enters the pump unit through the suction valve. Hp4 supply pump construction. • the hp4 basic supply pump construction is the same as for the hp3. the composition is also the same as the hp3, being made up of the pump unit (eccentric cam, ring cam, plunger), the scv (suction control valve), the fuel temperature sensor, and the feed pump. the main difference is that there are three plungers.
Hp4 Supply Pump Exploded View At Diesel Engine Troubleshooting Page 133 repair section – page 134 published : august 2004 second issu: september 2007 edited and published by: denso corporation service department 1 1 showa cho, kariya, aichi prefecture, japan view and download denso crs service manual online. diesel injection pump. Hp4 supply pump component part functions. • the hp4 supply pump component parts and functions are basically the same as for the hp3. the explanations below. only cover those points on which the hp4 differs from the hp3. for other parts, see the appropriate item in the explanation of the hp3. • a triangular ring cam is installed on the. [1] supply pump (hp3, hp4) (1) outline a. the supply pump consists primarily of the pump body (cam shaft, ring cam, and plungers), scv (suction control valve), fuel temperature sensor, and feed pump. b. the two plungers for hp3 or the three plungers for hp4 are positioned vertically on the outer ring cam for compactness. c. the engine drives. 3. supply pump 3.1 outline the hp3 and hp4 supply pumps have the same construction and operational characteristics as the conventional supply pumps. supply pumps place fuel suctioned from the fuel tank under high pressure for delivery to the rail. a feed pump outlet, and pump inlet have been added to the 2010 model supply pump to inhibit air.
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