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Cummins N855 Big Cam engine specifications and manuals - amp

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essential bolt tightening torques, 

characteristics of the engine 
e.g. its power and torque. 

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


 
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Cummins N855 Big Cam bolt torques, specifications and links to manuals - amp

 
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Cummins N855 Big Cam I thru Big Cam III step by step essential bolt tightening torques

 
Cummins N855 Big Cam
Main Bearing Bolts

Step 1 = 85 lb.ft, 115 Nm
Step 2 = 170 lb.ft, 230 Nm
Step 3 = 255 lb.ft, 345 Nm
Step 4 = Loosen
Step 5 = 85 lb.ft, 115 Nm
Step 6 = 170 lb.ft, 230 Nm
Step 7 = 255 lb.ft, 345 Nm

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Cummins N855 Big Cam 
engine manuals and specs
 
Cummins N855 Big Cam
Connecting Rod Bolts

Step 1 = 100 Nm, 75 lb.ft
Step 2 = 200 Nm, 150 lb.ft
Step 3 = Loosen
Step 4 = 100 Nm, 75 lb.ft
Step 5 = 200 Nm, 150 lb.ft

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Cummins N855 Big Cam 
engine manuals and specs
 
Cummins N855 Big Cam
Cylinder Head Bolts

Step 1 = 30 Nm, 25 lb.ft
Step 2 = 135 Nm, 100 lb.ft
Step 3 = 340 Nm, 305 lb.ft

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Cummins  N855 Big Cam 
engine manuals and specs
 

Cummins N855 Big Cam IV step by step essential bolt tightening torques

 
Cummins N855 Big Cam
Main Bearing Bolts

1" bolts:
Step 1 = 110 lb.ft, 150 Nm
Step 2 = 210 lb.ft, 285 Nm
Step 3 = 305 lb.ft, 415 Nm
Step 4 = Loosen
Step 5 = 110 lb.ft, 150 Nm
Step 6 = 210 lb.ft, 285 Nm
Step 7 = 305 lb.ft, 415 Nm

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Cummins N855 Big Cam 
engine manuals and specs
 
Cummins N855 Big Cam
Main Bearing Bolts

3/4" bolts:
Step 1 = 90 lb.ft, 120 Nm
Step 2 = 170 lb.ft, 230 Nm
Step 3 = 255 lb.ft, 345 Nm
Step 4 = Loosen
Step 5 = 90 lb.ft, 120 Nm
Step 6 = 170 lb.ft, 230 Nm
Step 7 = 255 lb.ft, 345 Nm

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Cummins N855 Big Cam 
engine manuals and specs
 
Cummins N855 Big Cam
Connecting Rod Bolts

Step 1 = 100 Nm, 75 lb.ft
Step 2 = 230 Nm, 170 lb.ft

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Cummins  N855 Big Cam 
engine manuals and specs
 
Cummins N855 Big Cam
Cylinder Head Bolts

Step 1 = 35 Nm, 25 lb.ft
Step 2 = 135 Nm, 100 lb.ft
Step 3 = 385 Nm, 285 lb.ft

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Cummins  N855 Big Cam 
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N855 Common Specs from Big Cam I thru Big Cam IV

 
Cummins N855 Big Cam
Displacement and arrangement

Displacement
14.0 liter,  855 CID

Arrangement
6 cylinder in-line engine
with
naturally aspirated
turbocharged 
and turbo aftercooled
variants

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Cummins N855 Big Cam 
engine manuals and specs
 
Cummins N855 Big Cam
Bore and stroke

Bore
139.7 mm,  5.5 in

Stroke
152.4 mm,  6.00 in

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Cummins N855 Big Cam 
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Cummins N855 Big Cam
Power and torque

Power
250-400 hp
186 -298 kW @ 2100 rpm

some later standby gensets 
rated at 600 hp, 450 kW

Torque
(400 hp engine)
1150 lb.ft, 1559 Nm @ 1500 rpm

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Cummins  N855 Big Cam 
engine manuals and specs
 
Cummins N855 Big Cam
Dimensions and weight

Dimensions
approx:
length 1496 mm, 59 in
width 863 mm, 34 in
height 1293 mm, 51 in

Weight
approx:
2800 lb, 1273 kg

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Cummins  N855 Big Cam 
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Big Cam Cummins N855 Manuals, Books, History, Valve and injector set procedures

 

Big Cam Cummins N855 Manuals and Spec Sheets

N855 Big Cam Manuals, Spec Sheets, Parts books - click to view

Big Cam Cummins N855 History and model differences

Cummins N855 History and model differences

Big Cam Cummins N855 Injector Settings, Valve Clearances

Cummins N855 Big Cam injector and valve clearance settings and procedures


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