Cummins KT19 Specifications
| Engine Model: Cummins KT19 |
| Engine Type: 4-cycle inline 6-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 1159 cu.in (19 L) |
| Rated Engine Power: 400-700 Hp (298-522 kW) at 2000 rpm |
| Aspiration Type: Turbocharged |
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The Cummins KT19 is a heavy-duty, 19-liter,
turbocharged diesel engine designed for industrial, marine, mining,
locomotive, construction, and power-generation applications. As part of
the Cummins K-Series, the KT19 is engineered for extreme durability,
long overhaul intervals, and high torque output at low engine speeds.
Its rugged cast-iron construction, mechanical fuel system, and robust
internal components make it suitable for severe-duty operating
conditions involving long hours, continuous high load, and exposure to
harsh environmental factors.
The KT19 is available in multiple configurations: naturally aspirated
(K19), turbocharged (KT19), and turbocharged-aftercooled (KTA19). The
KT19 specifically refers to the turbocharged variant found in mobile and
stationary machinery. Respected worldwide for reliability, the KT19
powers haul trucks, crawler dozers, drilling rigs, marine propulsion
systems, generator sets, and industrial equipment requiring high
horsepower density and extreme durability.
The Cummins KT19 is a four-stroke, water-cooled, turbocharged inline
six-cylinder diesel engine. Displacement is 19 liters (1,159 cubic
inches). Bore is approximately 159 mm (6.25 in), while stroke is 159 mm
(6.25 in), creating a square-bore configuration optimized for balanced
performance and durability. Compression ratio typically ranges between
13.9:1 and 14.5:1 depending on turbocharging and emissions
configuration.
Power ratings vary by application:
– Industrial: 450–700 hp (336–522 kW) @ 1,800–2,100 rpm
– Marine propulsion: 400–600 hp (298–447 kW) @ 1,800–2,100 rpm
– Locomotive and mining: 500–700 hp (373–522 kW) @ 1,800–2,100 rpm
– Generator sets (KT19-G): 375–550 kW @ 1,500–1,800 rpm
Peak torque: 2,300–3,000 Nm (1,696–2,213 lb-ft) @ 1,300–1,500 rpm
Idle speed: 600–700 rpm
Governed speed: 1,800–2,100 rpm
Firing order: 1-5-3-6-2-4.
The forged-steel crankshaft is supported by seven large main bearings,
ensuring long-term reliability under heavy load. Pistons are forged
aluminum or steel-crown composite designs with reinforced combustion
bowls and cooling galleries. Connecting rods are forged alloy steel with
replaceable bearings. The camshaft is gear-driven, eliminating
dependency on timing chains or belts.
The KT19 uses a heavy cast-iron block with:
– Wet replaceable cylinder liners
– Deep-skirt structure for rigidity
– Wide main-bearing saddles
– Thick structural ribbing for vibration control
– Full water-jacket cooling
The use of wet liners improves cooling efficiency and allows simplified
overhaul procedures, since liners can be easily replaced without
machining the block.
Each cylinder has its own individual cylinder head rather than a single
block-length head.
Each head includes:
– Four valves per cylinder
– Direct-injection combustion chamber
– Hardened valve seats and guides
– High-temperature exhaust seats
Cold valve lash:
– Intake: 0.36 mm (0.014 in)
– Exhaust: 0.71 mm (0.028 in)
Individual cylinder heads allow for isolated service procedures and
improved durability at high temperature and pressure.
The KT19 uses a robust mechanical fuel-injection system renowned for
reliability and field-serviceability.
Components include:
– Mechanical PT (Pressure-Time) fuel pump
– Fuel transfer pump
– High-capacity injectors
– Primary and secondary fuel filters
Injection pressure and timing are controlled mechanically through the PT
system, which is widely used in Cummins heavy engines for stable fuel
delivery and simplified service.
Fuel-system maintenance:
– Replace filters every 250–300 hr
– Drain water separator daily
– Injector service every 1,500–2,000 hr
– PT pump calibration at overhaul.
The KT19 uses a full-pressure lubrication system with a gear-driven oil
pump.
Oil capacity: 48–55 liters (50.7–58.1 qt)
Oil pressure:
– Operating: 310–450 kPa (45–65 psi)
– Idle: 100–150 kPa (15–22 psi)
Recommended oil:
– SAE 15W-40
– oil meeting API CI-4, CJ-4, or CK-4
Oil-change interval: typically 250–500 hr for industrial use.
The cooling system includes:
– Belt- or gear-driven centrifugal water pump
– Large front-mounted radiator or marine heat-exchanger
– Thermostat-controlled coolant flow
– Oil cooler
Thermostat:
– Begins opening: 82°C (180°F)
– Fully open: 95°C (203°F)
Cooling-system capacity: 75–95 liters (79–100 qt)
System pressure: 70–100 kPa (10–15 psi).
| Intake and Exhaust Systems |
Turbocharging:
– Large fixed-geometry turbocharger
– High-flow turbine housing
– Lubricated by engine oil
Aftercooling (on KTA19):
– Air-to-water or air-to-air charge-air cooling
– Reduces intake temperature and increases air density
Air-filtration options:
– Dry-type filter
– Dual-stage heavy-duty filter
– Cyclone pre-cleaner for mining or quarry duty
Exhaust:
– Cast-iron manifold
– High-temperature turbine housing
– Marine wet-exhaust optional.
| Electrical and Starting Systems |
Standard electrical configuration:
– 24V starting motor
– Alternator: 35–70 amps
– Oil-pressure switch
– Water-temperature sender
– Tachometer sensor (flywheel pickup)
Mechanical versions do not require an ECM; electronic variants exist but
are less common in KT models.
Depending on application, the KT19 may
include:
– PTO drives
– Hydraulic pump drives
– Generator housings
– Remote radiator connections
– Marine cooling systems
– Locomotive traction alternator mounts.
Approximate physical dimensions:
– Length: 1,500–1,700 mm (59–67 in)
– Width: 1,000–1,200 mm (39–47 in)
– Height: 1,300–1,500 mm (51–59 in)
Dry weight: 1,800–2,100 kg (3,968–4,629 lb).
Routine schedules include:
– Oil and filter: 250–500 hr
– Fuel filters: 250–300 hr
– Air filter: inspect every 50–100 hr
– Valve adjustment: every 1,000 hr
– Injector calibration: 1,500–2,000 hr
– Cooling-system service: every 2 years
– Compression test: 2,000 hr
– Turbocharger inspection: each major service.
– Cylinder-head bolts: 340–380 Nm (251–280 lb-ft)
– Main-bearing caps: 650–750 Nm (479–553 lb-ft)
– Connecting rods: 220–260 Nm (162–192 lb-ft)
– Flywheel bolts: 420–480 Nm (310–354 lb-ft)
– Crankshaft damper bolt: 500–580 Nm (369–428 lb-ft)
– Oil-drain plug: 40–55 Nm (30–41 lb-ft)
– Injector hold-down: 30–40 Nm (22–30 lb-ft).
The Cummins KT19 is widely used in:
– Mining haul trucks
– Large crawler dozers
– Wheel loaders
– Excavators
– Oilfield drilling rigs
– Marine propulsion and onboard generators
– Locomotive auxiliary engines
– Industrial pumps and compressors
– Power-generation gensets
– Railway construction machines.
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