Komatsu 4d102 Manuals, Engine Specifications & Bolt Torques

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Komatsu 4d102
Main Bearing Bolts

4D102E-1 Between Engine
Nos: 26200282 - 26224124

S4D102E-1 Between Engine
Nos: 26200163 - 26221675

Step1 = 60 Nm
Step2 = 90 Nm
Step3 = 178 Nm From 4D102E-1
Engine No: 26224125 up

From S4D102E-1
Engine No: 26221676 up
From SAA4D102E-2 up
Step1 = 60 Nm
Step2 = 90 Nm
Step3 = +90 degrees

Komatsu 4d102
Connecting Rod Bolts

Connecting Rod Bolts
Step1 = 30 Nm
Step2 = 60 Nm
Step3 = Tighten 60

Komatsu 4d102
Cylinder Head Bolts

Cylinder Head Bolts
Step1 = tighten all 90 Nm
Step2 = check all
Step3 = six long bolts only to 120 Nm
Step4 = tighten all bolts further 90 degrees
Step5 = check all bolts at 136 Nm
(if bolt(s) found loose at 136 Nm redo those only from step1)

Komatsu 4d102
Displacement, Arrangement,
Bore and Stroke

Displacement
4D-102 - 3.9 liter, 238 CID

Bore
4.02", 102 mm

Stroke
4.72", 120 mm

Arrangement
4 cylinder in line turbo engine

Komatsu 4d102
Power and Torque

Power
97-112 kW, 130-150 hp
@ 2500 rpm

Torque
207-221 lb.ft, 280-300 Nm
@ 1500 rpm

Komatsu 4d102
Weight and Dimensions

Weight
approx:
390 Kg, 860 lb


Dimensions
approx:
length = 790 mm, 31 in
width = 711 mm, 28 in
height = 894 mm, 35 in

Compression Ratio
16.5:1