The Kubota D1105 isn’t just a compact diesel engine—it’s a benchmark of reliability and efficiency. As part of Kubota’s legendary “05‑Series”, the D1105 serves in hundreds of machines worldwide — from mini excavators and skid steers to tractors, generators, and wood chippers.
Whether you’re overhauling your engine, sourcing reliable parts, or simply verifying technical details, this guide covers everything you need — accurate specs, key variations, and where to find trusted replacement parts.
Kubota D1105 Engine Overview
| Specification | Details |
|---|---|
| Engine Type | Vertical, water‑cooled, 4‑cycle diesel |
| Number of Cylinders | 3 |
| Combustion System | Indirect injection (E‑TVCS — Three Vortex Combustion System) |
| Aspiration | Naturally aspirated (turbo variants available) |
| Fuel System | Mechanical in‑line injection or Common Rail (varies by version) |
| Design Focus | High reliability, simple maintenance, and low fuel consumption |
The D1105 embodies Kubota’s reputation for longevity and service ease — a mechanical, low‑maintenance engine that still meets strict global emission standards.
Core Kubota D1105 Specifications
| Specification | Value | Description |
|---|---|---|
| Engine Model | Kubota D1105 / D1105‑E2B / D1105‑E3B / D1105‑CR‑T | Various emission and fueling versions |
| Type | Vertical, Water‑Cooled, 4‑Cycle Diesel | Standard industrial design |
| Cylinders | 3 | Durable and compact layout |
| Bore × Stroke | 78.0 mm × 78.4 mm (3.07 in × 3.09 in) | Core engine geometry |
| Displacement | 1.123 L (68.53 cu in) | Total cylinder volume |
| Compression Ratio | 24:1 (typical) | Efficient combustion for high torque |
| Horsepower (Gross) | 24 – 33 HP (17.9 – 24.6 kW) @ 3000 RPM | Depends on aspiration (NA or Turbo) |
| Rated Speed | 2800 – 3000 RPM | Standard industrial range |
| Firing Order | 1 – 2 – 3 | Smooth, consistent firing |
| Rotation | Counter‑clockwise (from flywheel end) | Kubota standard |
| Oil Capacity | Approx. 5.3 – 5.7 L (5.6 – 6.0 U.S. qt.) | Varies by sump type |
| Dry Weight | ≈ 93 – 97 kg (205 – 214 lb) | Base model without attachments |
| Dimensions (L × W × H) | ~ 500 × 440 × 630 mm (19.7 × 17.3 × 24.8 in) | Approximate—varies by configuration |
Source: https://engine.kubota.com/products
D1105 Variants Guide
The D1105 family includes several sub‑models, each tuned for specific performance and emission needs.
1. Fuel System & Emission Tier
- Mechanical models (e.g., D1105‑E2B, E3B): Reliable in‑line injection pumps designed for Tier 2 / Stage IIIA compliance.
- Common Rail versions (e.g., D1105‑CR‑T): Equipped with electronic high‑pressure fuel control to meet Tier 4 / Stage V standards.
Tip: The suffix (like “E3B” or “CR‑T”) on the nameplate tells you the system type and emission level.
2. Power Output & Aspiration
- Naturally Aspirated (NA): ~24–25 HP @ 3000 RPM — standard for most compact equipment.
- Turbocharged (D1105‑T or D1105‑CR‑T): ~32–33 HP — ideal for high load applications.
Key Difference: The turbo adds horsepower and torque without increasing size significantly.
3️. Dimensions & Configuration Differences
Though the basic block stays the same, small variations occur depending on the installation:
- Flywheel housing type
- Cooling setup (radiator vs remote)
- Manifold orientation (vertical or horizontal)
These affect your total engine width and height, but not the internal specification.
How to Identify Your Exact D1105 Model
Your engine’s data plate is the key to precise identification and ordering parts.
Location: On top of the valve (rocker) cover or on the side of the block.
You’ll find:
- - Model Number (e.g., D1105‑E3B)
- - Serial Number — used to match exact parts and service data.
With this full code, any Kubota dealer or supplier can confirm your exact configuration.
Common Applications of the Kubota D1105
- Mini Excavators: Kubota KX and U Series, Bobcat models (331, 325)
- Skid Steers: Kubota S‑Series and New Holland machines
- Tractors: Kubota B and L Series (utility class)
- Generators / Compressors: Denyo, Multiquip, Miller, and others
- Utility and Hydraulic Equipment: Wood chippers, aerial lifts, pavers
Maintenance & Overhaul Tips for Kubota D1105
- Cooling System: Keep the radiator and water pump clean to prevent overheating.
- Fuel Filters & Injectors: Replace regularly to avoid hard starting and smoke.
- Gaskets & Seals: Use OEM‑quality kits during rebuilds.
- Torque Matters: Always follow the official tightening sequence (from the manual).
A well‑maintained D1105 can easily run beyond 10,000 hours between major overhauls. For more general advice, see our 10 Maintenance Tips for Kubota Tractors.
Quick Specs Recap
| Specification | Value (Typical) |
|---|---|
| Displacement | 1.123 L (68.53 cu in) |
| Cylinders | 3 |
| Bore × Stroke | 78.0 mm × 78.4 mm |
| Horsepower Range | 24 – 33 HP (@ 3000 RPM) |
| Aspiration | NA or Turbo |
| Combustion | Indirect Injection (E‑TVCS) |
| Dry Weight | 93 – 97 kg |
| Oil Capacity | 5.3 – 5.7 L |
| Core Applications | Tractors, Skid Steers, Excavators, Generators |
Your Trusted Source for Kubota D1105 Parts
Once you know your exact D1105 model, sourcing authentic & OEM‑equivalent parts is critical.
FridayParts offers a complete line of Kubota engine components — each tested for fit and durability to keep your machine running strong.
Each part meets or outperforms OEM standards, giving your engine the lifespan and performance Kubota intended.
Conclusion
The Kubota D1105 is a proven, versatile powerplant — compact, efficient, and designed to last.
By understanding its core specs, correctly identifying your model variant, and using high‑quality Kubota replacement parts, you can keep your equipment performing like new for years. Explore more OEM‑grade Kubota engine parts and overhaul kits today at: FridayParts.com.
