Kubota KX057: Problems, Solutions, Specs and Reviews

The Kubota KX057 is a popular compact excavator recognized for its reliability, performance, and operator comfort. However, like any heavy machinery, it can face challenges with age or severe applications. Below you’ll find a thorough guide to common Kubota KX057 issues, diagnostic tips, error code references, official specifications, and a brief look at real user experiences.

Kubota KX057 Specifications Table

Specs may vary by model year and region. Always check your operator manual or dealer documentation for exact numbers.

Textual Feature Highlights

• Engine: Kubota’s V2607 Tier 4 engine offers both low-end torque and high fuel efficiency, while meeting strict emission standards.
• Hydraulics: Variable displacement pumps ensure ample power for quick, precise movements and smooth control of attachments.
• Cab: Spacious interior with excellent visibility, ergonomic seating and controls, optional HVAC, and reduced vibration for operator comfort.
• Undercarriage and Blade: Durable steel tracks (or rubber track options), heavy-duty rollers, and the famed Kubota angle blade for grading and backfilling versatility.
• Maintenance: Wide-opening panels, grouped service points, and on-board diagnostic features make daily checks and repairs straightforward.
• Attachments: Compatible with buckets, breakers, thumbs, grapples, and augers using quick-attach couplers.

Kubota KX057 Problems and Solutions

1. Hydraulic System Issues

Common Problems:

• Slow or jerky hydraulic arm and boom movement.
• Hydraulic leaks.
• Loss of digging force.

Solutions:

• Check hydraulic fluid level: Always use recommended hydraulic oil; low fluid causes sluggish performance.
• Inspect hoses and fittings: Replace any damaged or leaking components.
• Clean or replace hydraulic filters: A clogged filter restricts flow and pressure.
• Bleed the hydraulic system: Air in the lines leads to jerky movement.
• Check for worn seals or cylinder damage: Have a professional rebuild cylinders if leaking persists.

2. Engine Starting and Performance Problems

Common Problems:

• Engine cranks but won’t start.
• Hard cold starts, especially in winter.
• Unusual engine knocking or smoke.

Solutions:

• Battery check: Ensure a fully charged battery with clean terminals.
• Fuel system: Replace fuel filters, drain water separator, and use fresh diesel.
• Glow plugs: Test and replace faulty glow plugs for better cold start performance.
• Air intake: Change the air filter if dirty or clogged.
• Schedule regular maintenance: Timely oil and filter changes prevent most engine problems.

3. Electrical and Warning Light Issues

Common Problems:

• Dashboard lights flicker or won’t turn off.
• Intermittent starter.
• Gauges not working.

Solutions:

• Inspect fuses and relays: Replace any blown or corroded fuses/relays.
• Check wiring harness: Repair/replace any chewed or damaged wires.
• Clean battery terminals and ground connections: This resolves many electrical gremlins.
• Faulty alternator or starter: Repair or replace as needed.

4. Track and Undercarriage Wear

Common Problems:

• Premature track wear or separation.
• Noisy rollers or idlers.
• Poor traction, frequent track de-tracking.

Solutions:

• Maintain correct track tension: Neither too tight (excess wear) nor too loose (risk of derailment).
• Clear debris and dirt: Always clean undercarriage after use.
• Routine inspection: Replace worn sprockets, rollers, or tensioners before they fail.

5. Cooling System Problems

Common Problems:

• Engine overheating or temperature warning light.
• Visible coolant leaks.

Solutions:

• Check coolant levels and top off using the recommended type.
• Flush radiator: Remove any mud, grass, or debris.
• Inspect for leaks: Replace worn hoses or gasket as needed.
• Thermostat/radiator cap issues: Replace if the engine stays hot or won’t build pressure.

Kubota KX057 Error Codes and Fixes

The KX057 is equipped with an integrated monitoring/control system that displays warning lights, audible alarms, and—in newer models—a digital error code readout. Understanding these error codes saves time and can prevent costly repairs. Here is a reference table and explanations:

Error Codes and Fixes Table

Note: Error codes may appear as “E-##”, “H-##”, or icons on newer digital displays. Consult operator’s manual for code-location specifics, as they can differ by year.

Code Explanations

• E-codes (Engine/ECU): These signal issues like low oil, high coolant temp, sensor failures, or general malfunctions.
• H-codes (Hydraulics): Indicate hydraulic pressure loss, air, overheating fluid, bad pumps.
• Battery Codes: A BATT light or code signals low battery charge—often caused by aging batteries or loose cables.
• Oil & Temp Lights: Immediate attention required—running with low oil or overheating can cause catastrophic damage.
• DPF Light: Indicates the Diesel Particulate Filter needs regeneration (burn-off); address quickly to prevent limp-home mode.
• Glow Plug/Preheat: Stay-on glow plug light after running indicates an issue with the preheating system; engine may become hard to start in cold temps.
• HST (Hydrostatic): Transmission-related codes or lights usually mean low or old fluid, or failing pump linkage.

How to Reset or Fix Most Codes

1. Basic Reset: Resolve the trigger (fluid refill, replace filter, etc.), then turn ignition OFF for a minute and ON again. This often resets temporary codes.
2. Manual Regen: For DPF codes, follow operator manual instructions to perform a regeneration.
3. Persistent Codes: Use a diagnostic scanner for Kubota systems (dealer-level) to clear hard codes after repairing.
4. Consult Manual: Always check the operator’s or service manual for the exact code definitions and reset procedures.

Kubota KX057 Reviews

Real-World Owner Experience

Positive Feedback

Reliability:
Most operators and fleet managers cite exceptional reliability with the Kubota KX057. Engines are known to start easily, run smoothly, and perform well even in harsh conditions if maintained.

Performance:
Operators praise the strong hydrodynamics, efficient fuel consumption, and powerful digging force even in compact job sites.

Comfort and Controls:
Users enjoy the intuitive layout of the controls, the adjustability of the seat, and the visibility around the machine. The quiet, climate-controlled cab is a popular option for professionals who spend all day in the seat.

Maintenance:
The KX057 wins points for serviceability. Daily checks are quick, parts are accessible, and diagnostic systems simplify troubleshooting and maintenance.

Versatility:
Compatible with a wide range of attachments, the KX057 is described as a one-machine toolbox—from digging and trenching to grading and lifting.

Minor Drawbacks

DPF/Emissions System:
Some users experience issues with DPF regens or emissions codes, particularly if running at low engine loads for extended periods. Running the excavator at operational speed as recommended keeps these problems rare.

Purchase Cost:
The KX057 is an investment, with a higher up-front price than some competitors. However, its low total cost of ownership and resale value make it worthwhile for most buyers.

Size/Transport:
Heavier than ultra-compact models; owners should ensure appropriate transport equipment.

Owner Testimonial

“I’ve used the KX057 for site prep and utility trenching in all kinds of weather. It’s a beast. Keep it serviced, run quality diesel, blow out the radiators—it won’t let you down. Easily worth the cost for any contractor who needs a compact but powerful excavator.”
— Landscaping contractor, Ohio

Operator Experience

The Kubota KX057 receives high marks from owners and contractors alike for:

• Smooth hydraulic controls: Operators find it precise and responsive for trenching, grading, and loading.
• Powerful, fuel-efficient engine: The V2607 diesel runs strong even in tough soil conditions.
• Durable undercarriage: Tracks and rollers are robust for demanding construction sites.
• Operator comfort: Spacious cab, ergonomic controls, optional air conditioning, and excellent visibility set it apart from competitors.

Pros

• Reliability: Minimal downtime and rare breakdowns reported.
• Easy maintenance: Well-placed service points and intuitive design.
• Versatile attachments: Quick-coupler systems and angle blade option appeal to landscape and utility contractors.

Cons

• Price: Higher initial cost, but most find it justified by reliability and residual value.
• DPF/emissions system complexity: Some operators note finicky DPF regen cycles—best mitigated by regular high-load operation.
• Weight/Transport: Heavier than some compact competitors; requires heavy-duty trailers for transport.

Sample Owner Comment

“We’ve run our KX057 for over 2,300 hours now with only minor maintenance. The hydraulic power is great, cabs are quiet, and it’s hands-down the best mini-excavator I’ve owned. Just be sure to keep up on DPF regens and you’ll love it!”
— Construction foreman, Northeast US

Conclusion

The Kubota KX057 sets the standard for compact excavator performance and reliability. With robust specs, versatile attachments, and intuitive controls, it’s equally at home on construction sites or in rental fleets. Most potential problems are preventable through scheduled maintenance, regular fluid checks, and immediate response to warning codes. When problems do arise, Kubota’s diagnostic system makes troubleshooting clear, and parts/service are widely available.

For contractors and operators seeking a balance of power, comfort, and long-term value, the KX057 remains a top-tier choice—well regarded in reviews and supported by a loyal user community. If you want a compact excavator that works as hard as you do, the Kubota KX057 is a proven winner.

David Holtzman

I’m David man behind Lawn Mowerly; I’ve been dealing with lawnmowers and Tractors with my father since I was a kid. I know every make and model and what each one is capable of and love helping people find the perfect lawn mower for their needs.