Kirloskar HA Series air-cooled diesel engines are four-stroke, compression-ignition engines designed for industrial and mobile equipment applications. The range includes four-cylinder and six-cylinder models, with naturally aspirated and turbocharged configurations delivering different power outputs to meet varied operating requirements.
Featuring a modular design, air-cooling system, forced lubrication and accessible maintenance points, Kirloskar HA Series engines are suitable for selected applications in construction, earthmoving, mining, power generation, agriculture and material handling.
The Kirloskar HA Series includes the HA294, HA394, HA494 and HA694 naturally aspirated engines, along with the HA494TC and HA694TC turbocharged models. The range provides continuous power ratings from 19 BHP to 115 BHP across the models and operating speeds covered by the specifications below.
The air-cooled design removes the need for a conventional liquid-cooling circuit. A modular engine family supports component commonality, while the arrangement of key maintenance points helps simplify routine servicing.
Key Benefits and Features
| Specification | HA294 | HA394 | HA494 | HA694 | HA494TC | HA694TC |
| Engine configuration | 4-cylinder | 4-cylinder | 4-cylinder | 4-cylinder | 4-cylinder | 6-cylinder |
| Aspiration | Naturally aspirated | Naturally aspirated | Naturally aspirated | Naturally aspirated | Turbocharged | Turbocharged |
| Bore × stroke | 100 × 120 mm | 100 × 120 mm | 100 × 120 mm | 100 × 120 mm | 100 × 120 mm | 100 × 120 mm |
| Displacement | 1,884 cc | 2,826 cc | 3,786 cc | 5,652 cc | 3,768 cc | 5,652 cc |
| Compression ratio | 17:1 | 17:1 | 17:1 | 17:1 | 17:1 | 17:1 |
| Dry weight without flywheel | 243 kg | 300 kg | 338 kg | 430 kg | 338 kg | 448 kg |
Note: The cylinder configuration shown for HA294, HA394 and HA494 should be confirmed against the exact engine configuration before ordering.
Continuous Power Ratings
The following are continuous power ratings at 1,500 rpm. Maximum power ratings are separate and depend on the selected model, operating speed, duty classification and application.
| Model | Continuous power at 1,500 rpm | Equivalent approximate output |
| HA294 | 14 kW | 19 BHP |
| HA394 | 23.6 kW | 32 BHP |
| HA494 | 31.6 kW | 43 BHP |
| HA694 | 47.8 kW | 65 BHP |
| HA494TC | 41 kW | 56 BHP |
| HA694TC | 61 kW | 83 BHP |
General Technical Specifications
| Parameter | Details |
| Engine type | Vertical, air-cooled, four-stroke diesel |
| Ignition | Compression ignition |
| Bore × stroke | 100 × 120 mm |
| Compression ratio | 17:1 |
| Minimum operating speed | 1,500 rpm |
| Low idle speed | 650 rpm |
| Maximum operating speed | Model- and duty-dependent; refer to the model specifications |
| Direction of rotation | Counter-clockwise when viewed from the flywheel end |
| Lubrication | Forced lubrication with full-flow, block-type oil cooler |
| Starting system | 12V electric starting system |
| Alternator | 12V, 35A with built-in cut-out |
| Turbocharged models | HA494TC and HA694TC |
Standard Equipment
Standard equipment includes:
A belt guard is specified for generator-set application engines. A torsional vibration damper is applicable to the HA694 and HA694TC models as specified for the configuration.
Optional Equipment
Depending on the selected engine and application, options include:
Optional equipment and compatibility must be confirmed for the chosen engine model and application.
Kirloskar HA Series air-cooled diesel engines are designed for a range of industrial and mobile equipment applications, including:
Construction and Earthmoving
Engine-powered construction and earthmoving equipment requiring a suitable continuous or variable-speed power rating.
Mining
Selected mining equipment applications, subject to the required engine configuration, duty rating and application approval.
Power Generation
Generator-set applications requiring a compatible engine and alternator combination. Final output depends on engine speed, duty classification and the generator configuration.
Material and Fluid Handling
Industrial equipment requiring mechanical drive power or compatible hydraulic pump integration.
Agriculture and Tractor Applications
Selected agricultural machinery and tractor-related applications requiring a suitable engine configuration.
Industrial and Automotive Equipment
Industrial machinery and selected automotive applications, subject to compatibility with the intended equipment and operating conditions.
Marine and Offshore Applications
Selected specialised applications requiring confirmation of engine suitability and any relevant application-specific approvals.
The Kirloskar HA Series is a family of vertical, air-cooled, four-stroke diesel engines available in naturally aspirated and turbocharged configurations. The range includes models for selected industrial and mobile equipment applications.
The range covered on this page includes HA294, HA394, HA494, HA694, HA494TC and HA694TC. Confirm current availability and the appropriate configuration with AHCL Auto and Equipment Division.
Continuous power ratings vary by model and engine speed. At 1,500 rpm, the specified continuous ratings range from 19 BHP for the HA294 to 83 BHP for the HA694TC. Other ratings apply at different operating speeds and under different duty classifications.
The HA294, HA394, HA494 and HA694 are naturally aspirated models. The HA494TC and HA694TC are turbocharged variants. Their power outputs and operating limits differ, so selection should be based on the equipment’s required power, speed and duty cycle.
An air-cooled engine does not require a conventional liquid-cooling circuit. This simplifies the cooling arrangement and can make installation and maintenance more straightforward, depending on the equipment and operating environment.
Suitable configurations can accommodate hydraulic pumps, compressors and other drive accessories. The correct arrangement depends on the engine model, available drive interface, required speed and torque.
Yes. The standard configuration includes a 12V electric starting system. Depending on the model and application, options include a 24V starting system, additional shutdown protections, tachometer and hour-meter arrangements, and other monitoring instruments.
Provide the required continuous power, operating speed, torque, duty cycle, installation dimensions, drive interface and operating conditions. These details help determine which model and rating are suitable for the application.
Contact AHCL Auto and Equipment Division for sales enquiries, engine selection assistance and service-related enquiries in Saudi Arabia.
AHCL Sales and Service Support
AHCL Auto and Equipment Division supports industrial equipment requirements across Saudi Arabia. Contact the team to discuss Kirloskar engine selection, product enquiries, service support and genuine spare-parts requirements.
Sales and service enquiries
Contact AHCL with your equipment details and required engine rating to discuss a suitable configuration and request a quotation.
