Komatsu 4D-102 specifications and manuals


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Your Diesel Engine Specs

Basic specs are open to everyone and include images, displacement, dimensions and weight, essential bolt tightening torques, the characteristics of the engine like its power and torque.
Essential bolt tightening torques are the main bearing cap bolt torque, the connecting rod cap bolt torque and the cylinder head bolt torques.


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Komatsu 4D102 Bolt torques, Engine Specs, manuals, images

Komatsu 4D102 manuals

Komatsu 4D102 Essential Bolt torques

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

Main Bearing bolts
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

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

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°
Step = 5 check all bolts at 136 Nm 
(if bolt(s) found loose at 136 Nm
redo those only from step1)

Komatsu 4D102 engine specs

Komatsu 102 series
Displacement
4D-102 - 3.9 liter, 238 CID

Bore - 4.02", 102 mm 
Stroke - 4.72", 120 mm

Arrangement
4D-102 
4 cylinder in line turbo engine

 
Power 
4D-102 - 97-112 kW, 130-150 hp 
@ 2500 rpm

Torque 
4D-102 - 
207-221 lb.ft, 280-300 Nm 
@ 1500 rpm


Dimensions:
4D-102 approx:
length = 790 mm, 31 in
width  =  711 mm, 28 in
height =  894 mm, 35 in

Weight:
4D-102 approx:
390 Kg, 860 lb

Compression ratio:
16.5:1



Komatsu 102 series engine Images


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