Komatsu 155-4 Diesel Engine specifications and manuals

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Workshop manual, specs and bolt torques for Komatsu 155-4 engines

Komatsu 155-4 series Diesel Engine Bolt Tightening Torques

Main Bearing Bolts 
step 1 = 310 Nm
step 2 = 610 Nm
step 3 = loosen all
step 4 = 155 Nm
step 5 = 290 Nm
step 6 = 520 Nm
step 7 = 740 Nm

Connecting Rod Bolts
step 1 = 210 Nm
step 2 = 415 Nm
step 3 = loosen all
step 4 = 80 Nm
step 5 = 210 Nm
step 6 = 285 Nm
step 7 = 420 Nm

Cylinder head Bolts
step 1 = 290 Nm
step 2 = 440 Nm
step 3 = 550 Nm


4-Cylinder Komatsu 155-4 series Diesel Engine Specs

  N.B. Specifications for more variants of the 155-4 and 155-4A engines are in the workshop repair manual

Arrangement
4 cylinder in line engine, 
turbocharged

Displacement
155-4 series - 12.840 liter

Bore
155.0 mm	
 
Stroke
170.0 mm

Power
210-240 hp, 156-178 kW 
@ 1850 rpm

Dimensions
length 1456 mm
width 1125 mm
height 1910 mm
(excluding exhaust pipe)

Weight
approx:
2050 kg

6-Cylinder Komatsu 155-4 series Diesel Engine Specs

  N.B. Specifications for more variants of the 155-4 and 155-4A engines are in the workshop repair manual

Arrangement
6 cylinder in line engine, 
turbocharged

Displacement
155-4 series - 19.260 liter

Bore
155.0 mm	
 
Stroke
170.0 mm

Power
300-320 hp, 220-238 kW 
@ 2000 rpm

Dimensions
length 1890 mm
width 1190 mm
height 1931 mm
(excluding exhaust pipe)

Weight
approx:
2500 kg


Komatsu 155-4 series Diesel Engine workshop repair Manual



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