Engine
Model
OM934
Model designation
934.974
No. of cylinders/arrangement
4, vertical, in-line
Operating principle
4-stroke diesel direct injection
Rated power as per DIN
(kW [hp])
170 (231)
Max. torque
(Nm)
900
Rated engine speed
(rpm)
2200
Idle speed
(rpm)
720
Torque increase
(%)
22
Bore/stroke
(mm)
110/135
Total displacement
(cc)
5132
Weight, dry
(kg)
510
Injection pressure
(bar)
up to 2400
Compression ratio
17.6 : 1
Injection nozzles
10-hole injection nozzles
Valve arrangement
2 intake/2 exhaust valves
Number of crankshaft bearings
5
Fan drive
mechanical via propeller shaft; fan speed via electronically
controlled viscous clutch
Cold start capability/(Z43)
(°C)
–15/–26
Engine oil + filter
(l)
17.5 max.
Cooling system with heater
(l)
36
Engine data – OM934
Technical Manual
Mercedes-Benz Special Trucks
Engine
86