Bobcat 331 vs Takeuchi TB135 Choosing the Better Compact Excavator

[MikePhua]

Compact Excavators and Their Role in Light Construction
Compact excavators have become indispensable in urban construction, landscaping, utility trenching, and brush clearing. Their small footprint, transportability, and hydraulic versatility make them ideal for tight-access jobs. Among the most discussed models in the 3–4 ton class are the Bobcat 331 and the Takeuchi TB135—two machines with distinct design philosophies and operational characteristics.
Bobcat, founded in 1947 and known for pioneering the skid steer loader, entered the compact excavator market in the 1980s. The 331 model was introduced in the late 1990s and became one of Bobcat’s most widely sold mini excavators. Takeuchi, a Japanese manufacturer with deep roots in compact equipment innovation, launched the TB135 in the early 2000s as part of its push into North American markets. Both machines are now commonly found in used equipment fleets and rental yards.
Engine and Hydraulic Performance
The Bobcat 331 is powered by a 40-horsepower Kubota V2203 engine, while the Takeuchi TB135 uses a 39-horsepower Yanmar 4TNV88 engine. Both engines are known for reliability, but the TB135’s Yanmar unit is often praised for smoother throttle response and quieter operation.
Hydraulic flow is a key differentiator:

• Bobcat 331: ~11.4 gpm auxiliary flow
  
• Takeuchi TB135: ~13.2 gpm auxiliary flow
  

This difference impacts attachment performance, especially for hydraulic thumbs, brush cutters, and augers. The TB135’s higher flow allows for more responsive auxiliary tools, though newer Bobcat models have since closed this gap.
Terminology Annotation:

• Auxiliary Flow: The hydraulic fluid volume available for attachments, measured in gallons per minute (gpm).
  
• Pilot Controls: Joystick systems that use low-pressure hydraulics to actuate main valves, offering smoother operation.
  
• Thumb Attachment: A hydraulic or mechanical clamp mounted opposite the bucket for grabbing debris or material.
  

Build Quality and Structural Design
The TB135 is often described as overbuilt for its class. It features:

• Thicker steel panels
  
• Heavier counterweight
  
• Robust undercarriage with wide track stance
  

This results in a more stable feel during digging and lifting. The Bobcat 331, while lighter and more nimble, has thinner sheet metal and a narrower track base, which can lead to more bounce or sway on uneven terrain.
In one Oklahoma rental fleet, a TB135 with 880 hours showed minimal wear on its boom pins and track rollers, while a similarly aged Bobcat 331 required bushing replacement and undercarriage adjustment.
Serviceability and Parts Access
Takeuchi machines are known for straightforward service access. The TB135 features:

• Rear engine access with wide-opening hood
  
• Side panels that expose hydraulic components
  
• Minimal electronics, simplifying diagnostics
  

Bobcat’s 331 has tighter engine compartments and more proprietary components, which can complicate repairs. However, Bobcat’s dealer network is extensive, and parts availability is generally good—though some users report delays for non-filter components.
In one case, a TB135 owner sourced joystick electronics and button covers for under $75, with delivery in two days. The simplicity of the machine allowed for DIY installation without dealer intervention.
Operator Comfort and Control Feel
The TB135 includes a high-quality Grammer seat, ergonomic pilot controls, and a spacious cab for its size. Operators often describe it as “smooth” and “balanced.” The Bobcat 331, while functional, has a more utilitarian cab layout and stiffer joystick feel.
Recommendations:

• For long shifts or fine grading, the TB135 offers better fatigue reduction
  
• For short-term rental or basic trenching, the 331 may suffice
  
• Add a hydraulic thumb and quick coupler to either machine for versatility
  

Terminology Annotation:

• Quick Coupler: A device that allows fast attachment changes without manual pin removal.
  
• Grammer Seat: A brand of suspension seats designed for vibration isolation and lumbar support.
  

Zero Swing vs Conventional Tail
Neither the Bobcat 331 nor the TB135 is a true zero tail swing machine. However, the TB135’s rear counterweight is better integrated, reducing overhang. Zero swing machines are often marketed for tight-access jobs, but they come with trade-offs:

• Reduced counterweight leads to rougher ride
  
• Service access is limited
  
• Higher purchase cost
  

One operator described zero swing machines as “10 pounds of potatoes in a 5-pound sack”—compact but compromised. For general use, conventional tail designs like the 331 and TB135 offer better balance and easier maintenance.
Conclusion
Between the Bobcat 331 and the Takeuchi TB135, the TB135 stands out for its build quality, hydraulic performance, and operator comfort. While the 331 is a capable machine with strong dealer support, it falls short in auxiliary flow and structural robustness. For buyers seeking a reliable, smooth-operating compact excavator with long-term serviceability, the TB135 is often the better choice. In the field, feel and function matter—and the TB135 delivers both with quiet confidence.
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