Komatsu 4D102 series specifications and manuals

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

Komatsu 4D102 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

Komatsu 4D102 Connecting Rod Bolts and Cylinder Head Bolts
 
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 degrees
Step5 = check all bolts at 136 Nm
(if bolt(s) found loose at 136 Nm redo those only from step1)

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

Bore
4.02", 102 mm

Stroke
4.72", 120 mm

Komatsu 4D102 Arrangement
 
4 cylinder in line turbo engine

Komatsu 4D102 Power
  97-112 kW, 130-150 hp
@ 2500 rpm

Komatsu 4D102 Torque
 
207-221 lb.ft, 280-300 Nm
@ 1500 rpm

Komatsu 4D102 Dimensions
 
approx
length = 790 mm, 31 in
width = 711 mm, 28 in
height = 894 mm, 35 in

Komatsu 4D102 Weight
 
approx
390 Kg, 860 lb

Komatsu 4D102 Compression ratio
 
16.5:1