EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
TM 9-2815-225-34&P · Work Package 0002 00
The Cummins NTC-400 diesel engine is a turbocharged, liquid-cooled, overhead valve, four-cycle engine with an in-line, six-cylinder design. The NTC-400 engine has a compression ratio of 13.5:1 (Big Cam I) and 14.0:1 (Big Cam III), and develops 400 horsepower at 2100 rpm. Peak torque is 1150 lb-ft at 1500 rpm (Big Cam I) and 1300 lb-ft at 1300 rpm (Big Cam III).
EXHAUST WATER THERMOSTAT
FLYWHEEL MANIFOLD MANIFOLD HOUSING
FAN CLUTCH HOUSING TURBOCHARGER
FAN WATER PUMP STARTER FUEL PUMP POWER OIL PAN VIBRATION
DAMPER AND AIR STEERING ENGINE OIL CRANKSHAFT COMPRESSOR PUMP COOLER ALTERNATOR
PULLEY
Figure 1. Cummins NTC-400 Diesel Engine—Left Side.
Figure 2. Cummins NTC-400 Diesel Engine—Right Side.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
Table 1. Engine Features and Characteristics.
ENGINE FEATURE/CHARACTERISTIC BIG CAM I BIG CAM III
Camshaft 2-1/2-inch diameter camshaft with gear drive controlling all valve
and injector movement. Made of induction-hardened alloy steel.
Camshaft followers are roller-type.
Connecting Rods Drop-forged, rifle-drilled for pressure lubrication.
Crankshaft High-tensile steel forging. Bearing journals and fillets-induction
hardened. Fully counterweighted.
Cylinder Block Alloy cast iron with removable wet liners.
Cylinder Heads Each head serves two cylinders. Drilled fuel supply and return
lines. High temperature inserts on exhaust valve seats.
Turbocharger Model T-50. Model HT-3B has a redesigned
compressor wheel, compressor
housing, turbine wheel and
shaft, bearing housing assembly,
location of oil inlet line, and
V-bands.
Exhaust Manifold Conventional log-type. Pulse-type for less restriction.
Fuel System Integral flywheel-type governor.
Injectors Camshaft actuated top-stop type.
Intake Manifold Conventional aftercooler. Triple-pass water aftercooler.
Lubrication Oil Cooler Conventional oil cooler and filter Engine and cooler core are made
with separately mounted bypass of cast aluminum and
oil filter on engine firewall. incorporates mounting adapters
Demand flow automatically for spin-on type full-flow and
regulates oil pressure and routes bypass oil filters, also
engine coolant through engine incorporates a bypass valve and
oil cooler twice. pressure sending unit.
Oil Pan Made of cast aluminum. Made of stamped steel.
Water Transfer Tube Made of cast iron. Made of stamped, welded steel.
EQUIPMENT DATA
Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cummins Engine Company, Inc. Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NTC-400 Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-cycle, turbocharged diesel, compression ignition
DIMENSIONS
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58.88 in. (149.6 cm) Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33.63 in. (85.4 cm) Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.91 in. (129.3 cm) Net Weight, Dry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,600 lb (1,180.4 kg)
CYLINDERS
Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . In-line Firing Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-3-6-2-4 Bore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 in. (14 cm) Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 in. (15.2 cm) Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 855 cu-in. (14 L) Compression Ratio: Big Cam I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.5:1 Big Cam III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.0:1
GOVERNED SPEED
Full Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2100 rpm No Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2460 rpm Idle Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 rpm
LUBRICATION SYSTEM
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Force-fed Operating Pressure (Normal): Big Cam I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50–70 psi (345–483 kPa) Big Cam III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35–45 psi (241–310 kPa) Operating Pressure (Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 psi (100 kPa) @ idle System Capacity Including Bypass Filter: Big Cam I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 qt (43.5 L) Big Cam III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 qt (41.6 L) Operating Temperature (Normal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200–250º F (93–121º C) Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear-type
COOLING SYSTEM
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Liquid with fan and radiator Operating Temperature (Normal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175–195º F (79–91º C) Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PERFORMANCE HEAD
Maximum Torque: Big Cam I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1150 lb-ft @ 1500 rpm Big Cam III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1300 lb-ft @ 1300 rpm Maximum Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 BHP Piston Speed @ 2100 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2100 ft/min Maximum No Load Governed Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2460 rpm Maximum Approved Altitude, Transient Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12,000 ft (3658 m) Maximum Approved Altitude, Continuous Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 6000 ft (1829 m) Ambient Air Temperature Above Which Output Should be Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100º F (37.8º C) Air Flow @ 400 hp @ 2100 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 985 CFM Exhaust Flow @ 400 hp @ 2100 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2320 CFM Nominal Fuel Consumption @ 2100 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 lb/hr Nominal Fuel Consumption @ 500 rpm (Peak Torque) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 lb/hr Maximum Fuel Flow to Pump @ 2100 rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485 lb/hr Maximum Allowable Restriction to Pump: Clean Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 in. Hg Dirty Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0 in. Hg Maximum Allowable Return Line Restriction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 in. Hg
END OF WORK PACKAGE