z Engine serial No. (example 4 : PU158TI) EAZPA 8 00001 Serial No. Production Year(2008) Engine Model Suffix z Engine serial No. (example 5 : PU180TI) EASPA 8 00001 Serial No. Production Year(2008) Engine Model Suffix z Engine serial No. (example 6 : PU222TI) EAYPA 8 00001 Serial No. Production Year(2008) Engine Model Suffix 2.2. Engines Characteristic z The generator engine(P158LE/P180LE/P222LE) and power unit engine(PU158TI/PU180TI/PU222TI) series are V-type liquid-cooled 8/10/12-cylinder four-stroke Diesel engines with direct injection. 2.2.1. Oil gallery cooling type piston z Oil gallery cooling is used for the piston of the engine.
z When thermal loading is high, piston cooling by means of an oil gallery in the crown is normally necessary to prevent crown cracking and ring sticking. The design of the gallery, the design and location of the oil spray nozzle and the quantity of oil flowing in the gallery are ED7OM007 critical in order to achieve the desired temperature reduction. z The cross section shape of the gallery should be designed to achieve sufficient oil movement to maximize cooling efficiency. Technical Information - 20 -