23/02/2020
Unveiling the Kubota L185: Power and Performance
The Kubota L185 stands as a testament to robust engineering in the realm of compact utility tractors. Manufactured by the esteemed Kubota Corporation between 1977 and 1982, this versatile machine has earned its reputation for reliability and efficient performance. Whether you own one or are considering acquiring this piece of agricultural history, understanding its core components, particularly its engine, is paramount for effective operation and maintenance. This article delves deep into the specifications and capabilities of the Kubota L185, focusing on the powerhouse that drives it.
The Heart of the L185: The Kubota Z751A Engine
At the core of the Kubota L185 lies the highly dependable Kubota Z751A diesel engine. This compact yet potent powerplant is a two-cylinder, four-stroke, liquid-cooled unit, designed for efficiency and longevity. With a displacement of 0.7 litres (743 cm², or 45.3 cubic inches), it might seem modest in size, but it delivers a surprising amount of grunt for its class. The engine features a bore of 76.0 mm (2.99 inches) and a stroke of 82.0 mm (3.23 inches), contributing to its smooth operation and robust torque delivery. This naturally aspirated diesel engine is built to withstand demanding tasks, making it a suitable choice for a variety of agricultural and utility applications.
The Z751A engine is rated to produce a healthy 17.3 PS (12.7 kW; 17.0 HP) at a working speed of 2,800 rpm. Furthermore, it offers a Power Take-Off (PTO) output of 15.6 PS (11.5 kW; 15.4 HP), ensuring that it can effectively drive implements and machinery. The engine's starting system is a straightforward 12V electric starter, ensuring ease of ignition even in cooler conditions. For optimal performance and longevity, the engine requires 3.8 litres (4.02 US quarts; 3.34 Imperial quarts) of oil and 5.3 litres (5.6 US quarts; 4.66 Imperial quarts) of coolant, highlighting the importance of regular fluid checks and changes.
Key Engine Specifications:
| Specification | Detail |
|---|---|
| Engine Model | Kubota Z751A |
| Engine Type | Four-stroke, liquid-cooled, inline |
| Cylinders | 2 |
| Fuel Type | Diesel |
| Displacement | 0.7 L (743 cm², 45.3 cu·in) |
| Bore x Stroke | 76.0 mm x 82.0 mm (2.99 in x 3.23 in) |
| Horsepower | 17.3 PS (12.7 kW; 17.0 HP) @ 2,800 rpm |
| PTO Power | 15.6 PS (11.5 kW; 15.4 HP) |
| Starter | Electric (12V) |
| Oil Capacity | 3.8 L (4.02 US qt, 3.34 Imp qt) |
| Coolant Capacity | 5.3 L (5.6 US qt, 4.66 Imp qt) |
Chassis and Transmission: A Solid Foundation
The Kubota L185 is available in both two-wheel drive (2WD) and four-wheel drive (4WD) configurations, denoted by the L185FP and L185TP for 2WD models and the L185DT for the 4WD variant. This adaptability allows users to select the optimal setup for their specific operating conditions. The tractor features a robust gear-type transmission, offering a practical 8 forward and 2 reverse gears. This provides ample range for various tasks, from slow, deliberate work to more brisk transport. For those requiring even finer control over speed, certain configurations might also include creeper gears, offering a total of 16 forward and 4 reverse gears, with very low speeds like 2.4 km/h (1.5 mph) in forward and 1.3 km/h (0.8 mph) in reverse.
The steering system on the L185 is manual, providing a direct and responsive connection between the operator and the tractor's direction. The operator station is typically an open platform, designed for ease of access and good visibility, although enclosed cabs might have been available on some specific models. The tractor is also equipped with a fuel tank capacity of 22.0 litres (5.8 US gallons; 4.8 Imperial gallons), offering a reasonable operating range between refuelling stops.
Transmission and Drivetrain Features:
| Feature | Details |
|---|---|
| Transmission Type | Gear Type |
| Gears (Standard) | 8 Forward, 2 Reverse |
| Gears (Creeper) | 16 Forward, 4 Reverse |
| Max Forward Speed | 18.5 km/h (11.5 mph) |
| Max Reverse Speed | 9.0 km/h (5.6 mph) |
| Steering | Manual |
| Operator Station | Open Platform |
| Fuel Tank Capacity | 22.0 L (5.8 US gal, 4.8 Imp gal) |
Dimensions and Weight: Compact Utility Defined
The compact nature of the Kubota L185 is one of its key strengths, enabling excellent maneuverability in tight spaces. Its dimensions are thoughtfully proportioned: a length of 2,540 mm (100 inches), a width of 1,370 mm (53.9 inches), and a height of 1,930 mm (76 inches) to the exhaust. The wheelbase measures 1,520 mm (59.8 inches), contributing to its stability. The weight varies slightly depending on the drivetrain configuration, with the L185FP weighing 723 kg (1,594 lbs), the L185TP at 738 kg (1,628 lbs), and the 4WD L185DT being the heaviest at 809 kg (1,785 lbs). These figures underscore its suitability for a range of tasks, from light fieldwork to property maintenance.
Dimensional Overview:
| Dimension | Measurement |
|---|---|
| Length | 2,540 mm (100 in) |
| Width | 1,370 mm (53.9 in) |
| Height (Exhaust) | 1,930 mm (76 in) |
| Wheelbase | 1,520 mm (59.8 in) |
| Weight (L185FP) | 723 kg (1,594 lbs) |
| Weight (L185TP) | 738 kg (1,628 lbs) |
| Weight (L185DT) | 809 kg (1,785 lbs) |
PTO Capabilities and Tyres
The Kubota L185 is equipped with a rear PTO (Power Take-Off) that operates at standard speeds of 540, 700, or 1,000 rpm, depending on the engine speed. This allows for the efficient operation of a wide array of implements such as mowers, tillers, and balers. The front PTO, if equipped, typically spins at 2,430 rpm. The tractor is fitted with agricultural-style tyres, with common sizes being 4.00-15 for the front on 2WD models and 6-14 for the front on 4WD models, while the rear tyres are typically 9.5-24 for both configurations. These tyre sizes provide excellent traction and stability for various ground conditions.
Tyre Specifications:
| Drive Type | Front Tyres | Rear Tyres |
|---|---|---|
| 2WD | Ag: 4.00-15 | Ag: 9.5-24 |
| 4WD | Ag: 6-14 | Ag: 9.5-24 |
Is the Kubota L185 a Reliable Tractor?
Indeed, the Kubota L185 is widely considered a reliable and capable compact utility tractor. Kubota has a long-standing reputation for producing durable and high-quality machinery, and the L185 is no exception. Its robust Z751A engine, coupled with a sturdy transmission and chassis, is designed for longevity and consistent performance. Throughout its production run (1977-1982), the L185 proved its worth in numerous agricultural and residential applications, including mowing, landscaping, material handling, and even snow removal. Its compact size, combined with its efficient engine and versatile transmission, makes it an excellent choice for operators who need a dependable workhorse that can navigate various terrains and tasks with ease.
Frequently Asked Questions
Q1: What is the engine model in the Kubota L185?
The Kubota L185 is powered by the Kubota Z751A, a 0.7-litre, two-cylinder diesel engine.
Q2: How much horsepower does the Kubota L185 produce?
The engine produces approximately 17.3 PS (17.0 HP) at 2,800 rpm, with a PTO output of around 15.6 PS (15.4 HP).
Q3: What type of transmission does the L185 have?
It features a gear-type transmission with 8 forward and 2 reverse gears as standard.
Q4: Is the Kubota L185 available in 4WD?
Yes, the L185DT model is the four-wheel-drive variant.
Q5: What is the fuel tank capacity of the L185?
The fuel tank has a capacity of 22.0 litres (5.8 US gallons).
Conclusion
The Kubota L185 compact utility tractor, powered by the efficient Z751A engine, remains a capable and reliable machine even decades after its production ceased. Its balanced combination of power, manoeuvrability, and durability makes it a valuable asset for a wide range of tasks. Understanding its specifications, from the engine's core components to its transmission and dimensions, is key to appreciating its enduring legacy in the world of compact tractors.
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