Diesel engine manuals and specifications at Barrington Diesel Club

Komatsu 4d102 Manuals, Engine Specifications & Bolt Torques

 
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Komatsu 4d102 Essential Diesel Engine Bolt Tightening Torques

 

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 Diesel Engine Specs

 

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



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