This Workshop Manual has been prepared to provide serv1cmg personnel with information on the mechanism, service and maintenance of KUBOTA Diesel Engines. It is divided into two parts, "Mechanism" and "Disassembling and Servicing" for each section.
Information on the engine identification, the general precautions, maintenance check list, check and maintenance and special tools are described. Information on the construction and function are included. This part should be understood before proceeding with troubleshooting, disassembling and servicing. Refer to Diesel Engine Mechanism Workshop Manual (Code No. 9Y021-01875) for the one which has not been described to this workshop manual.
Information on the troubleshooting, servicing specification lists, tightening torque, checking and adjusting, disassembling and assembling, and servicing which cover procedures, precautions, factory specifications and allowable limits.
The engine has a high durability tunnel-type cylinder block in which the crank bearing component is a constructed body. Furthermore, liner less type, allow effective cooling, less distortion, and greater wear-resistance. The noise level is reduced to a minimum because each cylinder has its own chamber.
The cross-flow type intake I exhaust ports in this engine have their openings at both sides of the cylinder head. Because overlaps of intake I exhaust ports are smaller than in ports of other types which have openings on one side, the suction air can be protected from being heated and expanded by heated exhaust air. The cool, high density suction air has high volume efficiency and raises the power of the engine. Furthermore, distortion of the cylinder head by heated exhaust gas is reduced because intake ports are arranged alternately.
The combustion chamber is of KUBOTA's exclusive E-TVCS combustion chamber type. Suction air is whirled to be mixed effectively with fuel, prompting combustion and reducing fuel consumption.