Cummins KTA19 Engine Piston 3096685 Specifications

Cummins KTA19 Engine Piston 3096685: Specifications and Applications

The Cummins KTA19 engine piston 3096685 is a piston component associated with the KTA19 diesel engine family. Identifying the correct piston requires more than matching the engine model, because KTA19 engines have been produced in different configurations and ratings.

For maintenance or overhaul work, the safest approach is to verify the piston part number against the engine serial number, existing component, and applicable Cummins parts documentation. Cummins identifies the KTA19 as an inline-six, four-stroke diesel engine with a 19-liter displacement and a 159 × 159 mm bore and stroke.

What Is Cummins Piston 3096685?

Cummins piston 3096685 is listed as a piston for the KTA19 engine in aftermarket and parts-reference catalogs. A KTA19 parts listing identifies 3096685 as a piston with a quantity of six for a complete six-cylinder engine.

The Likang Power product page identifies the component as a KTA19 engine piston kit, with 3096685/3631241 shown in the product title. The page specifies KTA19 compatibility and lists engineering machinery, power-generation equipment, and marine propulsion among the applicable equipment.

Because part configurations can vary by engine arrangement, the number 3096685 should not be treated as a universal piston for every KTA19 application. Serial-number verification remains important before installation.

Key identification points

• Part number: 3096685
• Engine family: Cummins KTA19
• Component: Piston / piston kit
• Cylinder configuration: Inline 6-cylinder
• Typical engine displacement: 19 L
• Bore × stroke: 159 × 159 mm
• Potential applications: Engineering machinery, power generation, and marine propulsion
• Verification: Engine serial number and existing part number should be checked before replacement

KTA19 Engine Specifications Relevant to the Piston

Understanding the engine's basic geometry helps explain the operating environment of a KTA19 piston.

Cummins describes the KTA19 as a 19-liter, inline-six, four-stroke diesel engine. Depending on the configuration, the engine uses turbocharging and aftercooling and has a 159 mm bore with a 159 mm stroke.

The exact rating depends on the KTA19 variant and application. Cummins documentation shows KTA19 ratings ranging from approximately 450 to 700 hp in certain configurations, while marine versions have their own rating schedules.

This matters during piston replacement because a piston is part of a complete combustion system. Its compatibility must be considered together with the cylinder liner, piston rings, connecting rod, wrist pin, cylinder head, and engine calibration.

How Does a KTA19 Piston Work?

A diesel engine piston converts combustion pressure into mechanical movement.

During operation, the piston moves vertically inside the cylinder liner. The connecting rod transfers this reciprocating movement to the crankshaft, which converts it into rotational power.

The basic four-stroke sequence is:

1. Intake: The piston moves downward while air enters the cylinder.
2. Compression: The piston moves upward and compresses the air.
3. Power: Fuel is injected and combustion produces high cylinder pressure.
4. Exhaust: The piston moves upward and pushes combustion gases out.

The piston therefore operates under repeated mechanical and thermal loading.

In a large-displacement diesel such as the KTA19, piston condition can directly affect compression, combustion efficiency, oil consumption, and overall engine reliability. Excessive wear or incorrect component matching can create problems that extend beyond the piston itself.

Cummins KTA19 Piston 3096685 Specifications

Available product information for the 3096685 piston provides several useful identification details, but not every field should be interpreted as an engineering drawing specification.

Likang Power lists the component as a piston kit, identifies iron as the material, gives a listed weight of 7.6, and provides dimensions of 17 × 17 × 26. The published page does not state the measurement units for the weight and dimensions, so these figures should be confirmed with the supplier before being used for engineering or installation purposes.

*The source page does not specify the units for these figures. They should therefore be treated as supplier-listed identification data rather than confirmed dimensional engineering specifications.

For a rebuild, the critical measurements should come from the applicable Cummins technical documentation or verified component inspection rather than from a general online product listing.

Where Is the KTA19 Piston Used?

The KTA19 platform is used across demanding applications where high power density and long operating periods are important.

Cummins documentation covers KTA19 configurations for marine propulsion and auxiliary power, while other KTA19 variants are used in power-generation and heavy-equipment applications.

Engineering and heavy equipment

Construction and engineering machinery can place significant load on the engine through extended high-load operation. Piston condition becomes particularly important when an engine is approaching overhaul intervals or showing symptoms such as increased oil consumption or reduced compression.

Power generation

KTA19 engines are used in generator applications with different prime, standby, and fixed-speed configurations. Cummins documentation lists KTA19 generator ratings for both 50 Hz and 60 Hz applications.

For generator engines, piston replacement should be considered alongside cylinder liner condition, injector performance, lubrication, and cooling-system condition.

Marine propulsion

Cummins offers KTA19 marine configurations with continuous and heavy-duty ratings. Published marine specifications include 19-liter displacement and a 159 × 159 mm bore and stroke.

Marine engines can experience long periods of sustained load, making correct piston-to-cylinder clearances and combustion-system condition particularly important during overhaul work.

3096685 vs. Other KTA19 Piston Part Numbers

One reason part-number verification matters is that multiple piston numbers appear in KTA19 parts catalogs.

For example, one KTA19 parts reference lists 3096680, 3096681, 3096682, 3096683, and 3096685 as piston part numbers.

That does not mean these numbers are interchangeable.

A piston that physically resembles the removed component may still have differences affecting compression height, ring configuration, combustion-bowl geometry, pin dimensions, or operating clearances.

How to Verify a 3096685 Replacement Piston

Before replacing a KTA19 piston, use a component-identification process rather than relying on the engine family alone.

Recommended verification workflow:

1. Record the complete engine serial number.
2. Record the number stamped or marked on the existing piston.
3. Confirm the engine model and configuration.
4. Check the applicable Cummins parts documentation.
5. Compare the piston, pin, rings, and liner specifications.
6. Inspect the cylinder liner and connecting rod before assembly.
7. Confirm the installation dimensions and service limits.
8. Document the replacement part for future maintenance records.

Likang Power also states that customers can provide the engine serial number or old part number for a technical cross-check.

This is especially useful for older KTA19 engines where components may have been replaced during previous rebuilds.

What Should Be Checked During Piston Replacement?

Replacing a piston without checking the surrounding components can leave the underlying failure unresolved.

A proper inspection should consider:

• Cylinder liner wear and surface condition
• Piston-ring groove condition
• Ring end gaps and side clearances
• Wrist pin and connecting-rod condition
• Connecting-rod bearing condition
• Cylinder-head condition
• Injector operation
• Lubricating-oil condition
• Cooling-system performance
• Signs of abnormal combustion

The piston crown can provide useful evidence about engine operating conditions. Heavy carbon deposits, localized discoloration, erosion, cracking, or unusual wear may indicate problems with fuel injection, cooling, lubrication, or combustion.

For this reason, a piston replacement is often best treated as part of a system-level engine inspection, not simply as a component swap.

Product Information for Cummins KTA19 Piston 3096685

The published Cummins KTA19 Engine Piston 3096685/3631241 product page identifies the component for KTA19 engines and lists applications including engineering machinery, power generation equipment, and marine propulsion.

The page also states that Likang Power supplies Cummins diesel and gas engine parts and provides technical support for component identification. It lists a six-month product warranty and describes multi-layer packaging for long-distance transportation.

For technical verification, buyers should provide the engine serial number and current piston part number before treating the listed component as a confirmed replacement.

Frequently Asked Questions

Is Cummins piston 3096685 used on the KTA19 engine?

Yes. Parts references list 3096685 as a piston associated with the Cummins KTA19 engine family, and the Likang Power product page identifies 3096685/3631241 as a KTA19 piston product.

What are the basic KTA19 engine dimensions?

Cummins lists the KTA19 as a 19-liter engine with a 159 mm bore and 159 mm stroke. Specific engine dimensions and ratings vary by configuration.

Does every KTA19 use piston 3096685?

Not necessarily. Multiple piston part numbers are associated with KTA19 parts references, so the engine serial number and existing component number should be checked before replacement.

What applications use KTA19 engines?

KTA19 engines are used in applications including marine propulsion, power generation, and heavy engineering equipment. The exact configuration and rating depend on the application.

What information should be provided when identifying a replacement piston?

The most useful information includes the engine serial number, engine model, existing piston part number, and application. These details reduce the risk of selecting a visually similar but technically incorrect component.

Reference Sources

1. Cummins — KTA19 Engine Specifications
   Cummins KTA19 official specifications
2. Cummins — K19 Engine Specifications and Ratings
   Cummins K19 official specifications and ratings
3. Cummins — KTA19 Marine Propulsion and Auxiliary Engine Specifications
   Cummins KTA19 marine specification sheet
4. Cummins KTA19-G4 Technical Specification Sheet
   Cummins KTA19-G4 specification sheet
5. Likang Power — Cummins KTA19 Engine Piston 3096685/3631241
   Product specifications and application information