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Caterpillar GCM34 Engine

The Caterpillar GCM34 is a 38.1 L 20-cylinder turbocharged and after-cooled engine rated at 720 rpm, producing up to 6720 kW. It powers generator sets from Caterpillar, including the G16CM34.

Also known as: Caterpillar GCM34

38.1 L
Displacement
20
Cylinders
720 rpm
Rated speed
6720 kW
Gross power

Engine specifications

Displacement38.1 L
Cylinders20
AspirationTurbocharged and after-cooled
Rated speed720 rpm
Gross power6720 kW

Service specifications

9
TypeItemValueUnitCondition
OtherGross Input Torque (TH55-E70)12 667N•m (9350 lb-ft)
OtherGross Input Torque (TH55-E90)12 677N•m (9350 lb-ft)
OtherStall Torque Ratio (TH55-E70)2.23
OtherStall Torque Ratio (TH55-E90)2.23
PressureWS255 pump plunger load238,000lb (107,960 kg)
PressureWS273XD pump plunger load275,000lb (124 738 kg)
PressureWS305XD pump plunger load250,000lb (113 398 kg)
SpeedMaximum Input Speed (TH55-E70/TH55-E90 transmissions)1970rpm
SpeedRated Input Speed (TH55-E70/TH55-E90 transmissions)1900rpm

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
Engine oilEPA 2D 89.330-96 (fuel reference, Diesel <6.6 L, density 0,845-0,850 kg/L a 15 °C)Reference condition only, not a lubricant recommendation
Fuel35° API, LHV 42 780 kJ/kg (18,390 Btu/lb), density 838,9 g/L (Diesel ≥7 L rating condition)Reference fuel for Diesel rating conditions

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What is the displacement of the Caterpillar GCM34?

The Caterpillar GCM34 has a displacement of 38.1 liters with 20 cylinders.

Which generators use the Caterpillar GCM34 engine?

The Caterpillar GCM34 powers 1 generator set(s), including Caterpillar G16CM34.