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Cummins LTA10 Specifications
| Engine Model: Cummins LTA10 |
| Engine Type: 4-cycle inline 6-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 610 cu.in (10 L) |
| Rated Engine Power: 268-469 Hp (200-350 kW) at 2100 rpm |
| Aspiration Type: Turbocharged |
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| General Technical Data |
The Cummins LTA10 is a high-output, turbocharged, aftercooled inline six-cylinder diesel engine engineered for heavy-duty off-road machinery, commercial vehicles, generator sets, construction equipment, marine auxiliary power, and industrial power units. As part of the Cummins L Series platform, the LTA10 is recognized for its strong power-to-weight ratio, exceptional continuous-duty capability, rugged mechanical systems, and long overhaul intervals.
The engine’s cast-iron block and head, combined
with a robust turbocharged and aftercooled air-handling system, provide
stable combustion, high torque delivery, and reliable performance in
severe working environments. The LTA10 benefits from Cummins'
long-standing design philosophy: high durability, serviceability in
remote locations, mechanical reliability, and parts compatibility with
multiple L Series variants.
The Cummins LTA10 is a four-stroke, inline six-cylinder, turbocharged,
liquid-cooled diesel engine with a displacement of approximately 10.0
liters (610 cubic inches). Bore generally measures 125 mm (4.92 inches),
and stroke is about 136 mm (5.35 inches), forming a long-stroke
configuration that develops excellent low-speed torque and
load-acceptance characteristics. Depending on rating, the LTA10
typically produces 200–350 kW (268–469 horsepower) at around 1800–2100
rpm.
Peak torque generally falls between 1200 and
1600 Nm (885–1180 lb-ft), usually achieved at 1300–1500 rpm. The firing
order is 1–5–3–6–2–4. Idle speed is typically around 650–750 rpm.
Turbocharging increases air density while aftercooling reduces intake
temperatures, enabling cleaner combustion, higher power density, and
improved overall efficiency.
The cylinder block is cast from heavy-duty, high-tensile-strength iron
designed to withstand high internal cylinder pressures. Reinforcement
ribs improve stiffness and maintain structural integrity under high-load
and high-temperature conditions. The forged-steel crankshaft is
supported by seven main bearings, providing excellent durability and
smooth rotation.
Cylinders are wet-liner type in many
configurations, facilitating easier overhaul and consistent cooling.
Internal oil galleries and coolant passages are cast and machined for
optimal flow, supporting lubrication and cooling across all vital
components. Threaded mounting bosses, tapped ports, and accessory
brackets integrate with multiple industrial and vehicular equipment
platforms.
The cast-iron cylinder head contains direct-injection combustion
chambers suited for turbocharged and aftercooled performance. Each
cylinder includes two intake and two exhaust valves, actuated through
hardened pushrods and rocker arms linked to the block-mounted camshaft.
Valve lash is manually adjustable and must be checked periodically.
Hardened valve seats and high-quality guides withstand the thermal and mechanical stresses generated in high-output diesel operation. The combustion chamber geometry promotes efficient swirl and atomization, enhancing fuel-air mixing and ensuring stable combustion. Integrated coolant passages manage thermal distribution within the head, preventing hot spots and improving longevity.
| Fuel System |
The LTA10 commonly employs a mechanical direct-injection fuel system. A mechanical lift pump draws fuel from the tank through filtration stages, including a water separator and a primary and secondary filter. A high-pressure inline fuel injection pump meters and times fuel delivery to each cylinder. Injection pressures typically range from 250 to 300 bar, enabling efficient atomization and strong combustion performance.
Multi-hole injectors spray fuel directly into the combustion chamber. An aneroid boost compensator may be fitted to increase fueling based on turbocharger boost, improving engine responsiveness under load and reducing black smoke. Mechanical governors maintain engine rpm stability, which is critical in generator-set and constant-speed applications.
| Lubrication System |
The full-pressure lubrication system operates using a gear-driven oil pump that pulls lubricant from the sump through a metal-mesh strainer and delivers it through a replaceable full-flow oil filter. Pressurized oil reaches the crankshaft main bearings, connecting rod journals, camshaft bearings, rocker arms, and turbocharger bearings. Piston-cooling oil jets are incorporated to maintain piston crown temperatures during heavy-duty cycles.
Normal operating oil pressure ranges from 300 to 450 kPa (44–65 psi), with idle pressure between 100 and 150 kPa (15–22 psi). Oil capacity generally falls between 25 and 30 liters (26.4–31.7 US quarts), depending on sump size and equipment configuration. High-quality diesel oil meeting API CF or higher specifications are recommended for extended operation.
| Cooling System |
The LTA10 uses a liquid-cooling system with a belt-driven centrifugal water pump. Coolant flows through block and head jackets, absorbing combustion heat before passing through the radiator or heat exchanger. The thermostat begins opening around 82°C (180°F) and is fully open near 95°C (203°F). Cooling system pressure typically ranges from 90 to 110 kPa (13–16 psi).
Coolant capacity depends on installation but generally ranges between 25 and 40 liters (26.4–42.3 US quarts). Air-to-air or air-to-water aftercooling systems reduce intake charge temperature and stabilize combustion. Proper coolant mixture, clean radiator cores, and functional thermostats are essential to prevent overheating and corrosion.
| Other Systems |
The turbocharger increases air density, improving torque and fuel efficiency. The aftercooler further lowers intake temperature, providing improved combustion stability. The intake system includes a heavy-duty dry-element air filter with optional two-stage filtration for high-dust environments. The exhaust manifold is constructed of heat-resistant cast iron designed to withstand extended high-temperature operation.
The electrical system may be 12- or 24-volt, with alternator outputs between 50 and 120 amperes. A reduction-gear starter provides reliable cold starting. Optional PTO drives, hydraulic pump flanges, and industry-specific accessory mounts expand compatibility with diverse equipment types.
| Dimensions and Weight |
The engine dimensions are:
Length 1400–1650 mm (55.1–65.0 inches)
Width 800–950 mm (31.5–37.4 inches)
Height 1150–1400 mm (45.3–55.1 inches)
Dry weight generally falls between 900 and 1100 kg (1984–2425 lbs),
depending on accessory configuration, turbocharger type, and cooling
arrangement. Despite its size, the LTA10 maintains a modular, accessible
layout that supports field servicing.
| Maintenance Data |
Oil and filter changes are typically recommended every 250–300 hours under heavy-duty operation. Fuel filter replacement is recommended every 250–400 hours. Air filter service intervals vary from 100 to 300 hours depending on airborne contaminants. Valve lash should be inspected and adjusted every 500–600 hours. Coolant replacement is generally required every two years or 2000 hours.
Injector testing, pump timing verification, and spray-pattern evaluation typically occur every 1500–2000 hours. Compression testing at around 3000 hours helps assess internal wear. Routine inspection of belts, hoses, aftercooler piping, turbocharger lubrication lines, mounting bolts, seals, and engine mounts ensures long-term durability and fault-free operation.
| Tightening Torques |
Cylinder head bolts: 200–230 Nm (148–170 lb-ft)
Main bearing cap bolts: 160–200 Nm (118–148 lb-ft)
Connecting rod bolts: 80–100 Nm (59–74 lb-ft)
Flywheel bolts: 260–300 Nm (192–221 lb-ft)
Crankshaft pulley bolt: 280–320 Nm (207–236 lb-ft)
Injector hold-down bolts: 25–30 Nm (18–22 lb-ft)
Glow plugs / intake heaters (if applicable): 10–15 Nm (7–11 lb-ft)
Oil drain plug: 40–50 Nm (30–37 lb-ft).
| Vehicle Applications |
The Cummins LTA10 powers a wide range of machinery including large agricultural tractors, loaders, excavators, mining trucks, drilling rigs, generator sets, marine auxiliary systems, rock crushers, industrial compressors, and heavy construction equipment. Its combination of strong torque, mechanical simplicity, cooling efficiency, and long working life make it ideal for severe-duty industrial environments.
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