Komatsu 3d88e-5p 4d88e-5x 4d94le-2z Service Manual
3D82AE, 3D84E, 3D88E, 4D88E, 4D98E, 4D106
This Komatsu manual describes the service procedures for the TNV series engines of indirect injection systems that have been certified by the US EPA, California ARB, and/or the 97/68/EC Directive for industrial use.
Komatsu 3D82AE 3D84E 3D88E Series Service Manual
Please use this manual for accurate, quick, and safe servicing of the said engine.
Since the explanation in this Komatsu repair manual assumes the standard type engine, the specifications and components may partially be different from the engine installed on individual work equipment (power generator, pump,
compressor, etc.).
Please also refer to the service manual for each work equipment for details.
The specifications and components may be subject to change for the improvement of the engine quality without notice. If any modification of the contents described herein becomes necessary, it will be notified in the form of correction information each time.
Komatsu 3d88e-5p 4d88e-5x 4d94le-2z Service Manual
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(3) Preparation before Disassembly
z Prepare general tools, special service tools, measuring instruments, oil, grease, non-reusable parts, and parts expected to be required for replacement.
z When disassembling complicated portions, put match-marks and other marks at places not adversely affecting the function for easy reassembly.
(4) Precautions in Disassembly
z Each time a parts is removed, check the part installed state, deformation, damage, roughening, surface defect, etc.
z Arrange the removed parts orderly with clear distinction between those to be replaced and those to be used again.
z Parts to be used again shall be washed and cleaned sufficiently.
z Select especially clean locations and use clean tools for disassembly of hydraulic units such as the fuel injection pump.
(5) Precautions for Inspection and Measurement
Inspect and measure parts to be used again as required to determine whether they are reusable or not.
(6) Precautions for Reassembly
z Reassemble correct parts in the correct order according to the specified standards (tightening torques, and adjustment standards). Apply oil important bolts and nuts before tightening when specified.
z Always use genuine parts for replacement.
z Always use new oil seals, O-rings, packing, and cotter pins.
z Apply sealant to packing depending on the place where they are used. Apply grease to sliding contact portions, and apply grease to oil seal lips.
(7) Precautions for Adjustment and Check
Use measuring instruments for adjustment to the specified service standards.