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Komatsu 155-4 series engines - specifications and manuals - amp

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Essential bolt tightening torques are
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 connecting rod cap bolt torque 
 and the cylinder head bolt torques.
 


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

 
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Komatsu 155-4 series Diesel Engine Bolt Tightening Torques

 
Komatsu 155-4 series
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

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 engine manuals and specs
 
Komatsu 155-4 series
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

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 engine manuals and specs
 
Komatsu 155-4 series
Cylinder Head Bolts

step 1 = 290 Nm
step 2 = 440 Nm
step 3 = 550 Nm

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 engine manuals and specs
 
Komatsu 155-4 Cylinder Head Bolt Tightening Sequence - click to expand

Komatsu 155-4 series Diesel Engine workshop repair Manual

 
workshop repair manual for Komatsu 155-4 series engines, 376 pages, Click to download

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

Komatsu 155-4 series
Arrangement, displacement, bore
and stroke

Arrangement
4 cylinder in line engine, 
turbocharged

Displacement
155-4 series - 12.840 liter

Bore
155.0 mm	
 
Stroke
170.0 mm

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 engine manuals and specs
 
Komatsu 155-4 series
Power

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

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 engine manuals and specs
 
Komatsu 155-4 series
Dimensions and weight

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

Weight
approx
2050 kg

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 engine manuals and specs
 

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

Komatsu 155-4 series
Arrangement, displacement, bore
and stroke

Arrangement
6 cylinder in line engine, 
turbocharged

Displacement
155-4 series - 19.260 liter

Bore
155.0 mm	
 
Stroke
170.0 mm

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 engine manuals and specs
 
Komatsu 155-4 series
Power

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

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 engine manuals and specs
 
Komatsu 155-4 series
Dimensions and weight

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

Weight
approx
2500 kg

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 engine manuals and specs
 


 
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