The Bobcat MT85 skid-steer loader uses a 12-volt, 750 cold-cranking amp (CCA) battery, typically group size 26R. This battery powers the engine and electrical systems, balancing compact dimensions (10.25″ L x 6.8″ W x 8.75″ H) with high durability for construction environments. Always verify specifications with your equipment manual or dealer for model-year variations.
What Is a Group Size 24 Battery?
How Does the Bobcat MT85 Battery Compare to Other Skid-Steer Models?
The MT85’s group 26R battery is smaller than the 31-series batteries used in larger Bobcat models like the S650. While the MT85 prioritizes space efficiency with 750 CCA, heavy-duty models often require 950+ CCA batteries for enhanced torque. Compact loaders from competitors like Kubota SVL65 use similar 26R batteries, but CCA ratings may vary by 5-10%.
When comparing the Bobcat MT85’s battery to other skid-steer loaders, it’s essential to consider both physical dimensions and electrical specifications. Larger models like the Bobcat S650 require more powerful batteries due to their increased engine size and hydraulic demands. The S650 typically uses a group 31 battery with 950 CCA, providing the necessary power for its 84-horsepower engine. In contrast, the MT85’s 26R battery is optimized for its 74-horsepower engine, balancing power and space efficiency.
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Competing models from other manufacturers, such as the Kubota SVL65, often use similar group 26R batteries but may have slight variations in CCA ratings. For instance, the SVL65’s battery is rated at 700 CCA, which is slightly lower than the MT85’s 750 CCA. This difference can impact performance in colder climates where higher CCA ratings are crucial. Below is a comparison table of common skid-steer models and their battery specifications:
| Model | Battery Group | CCA | Voltage |
|---|---|---|---|
| Bobcat MT85 | 26R | 750 | 12V |
| Bobcat S650 | 31 | 950 | 12V |
| Kubota SVL65 | 26R | 700 | 12V |
| Case SR175 | 34 | 850 | 12V |
This table highlights the MT85’s competitive positioning within its class, offering a balance of power and compactness that suits its operational requirements.
What Are the Key Specifications of the MT85 Battery?
- Voltage: 12V
- CCA Rating: 750 amps
- Dimensions: 10.25″ x 6.8″ x 8.75″ (LxWxH)
- Terminal Type: Top-post
- Chemistry: Lead-acid (flooded or AGM options)
- Reserve Capacity: 120 minutes
AGM batteries are recommended for vibration resistance and maintenance-free operation.
Why Is Cold Cranking Amp (CCA) Critical for the MT85?
CCA measures a battery’s ability to start engines in cold temperatures. The MT85’s 750 CCA ensures reliable ignition down to -18°C (0°F), crucial for construction equipment often used in winter. Insufficient CCA causes hard starts, voltage drops to accessories, and accelerated starter motor wear. Arctic regions may require battery warmers despite this rating.
Cold Cranking Amps (CCA) are particularly vital for equipment operated in varying climatic conditions. The MT85’s 750 CCA rating ensures reliable starts in temperatures as low as 0°F (-18°C). However, in regions where temperatures frequently drop below this threshold, additional measures such as battery warmers or insulated compartments may be necessary to maintain optimal performance.
It’s also important to note that CCA requirements can vary based on the engine’s oil viscosity and the efficiency of the starter motor. Thicker oil in colder weather increases the resistance the starter motor must overcome, thereby requiring higher CCA. The following table illustrates recommended CCA ratings based on temperature ranges:
| Temperature Range (°F) | Minimum CCA Recommendation |
|---|---|
| 32°F to 50°F | 600 CCA |
| 0°F to 32°F | 750 CCA |
| -20°F to 0°F | 900 CCA |
This demonstrates why the MT85’s 750 CCA battery is adequate for most temperate climates but may require supplementation in extreme cold.
When Should You Replace the Bobcat MT85 Battery?
Replace the battery if:
- Cranking speed drops noticeably
- Voltage tests below 12.4V at rest
- Visible corrosion on terminals
- Swollen case or electrolyte leaks
- Age exceeds 3-5 years (depending on use cycles)
Load-test batteries annually with a carbon pile tester for accurate health checks.
Which Maintenance Practices Extend MT85 Battery Life?
- Clean terminals monthly with baking soda/water solution
- Apply anti-corrosion grease after cleaning
- Keep vents clear of debris
- Recharge immediately after deep discharges
- Store with full charge during offseason
Hydrometer checks on flooded batteries help monitor electrolyte balance.
How Do You Safely Replace the Battery in a Bobcat MT85?
- Turn off engine and remove keys
- Disconnect negative (-) terminal first
- Remove positive (+) terminal
- Extract mounting bracket/clamp
- Lift out old battery (35-40 lbs)
- Install new battery and secure brackets
- Reconnect positive terminal first
- Apply dielectric grease to terminals
Wear acid-resistant gloves and goggles during replacement.
What Are the Consequences of Using an Incorrect Battery Size?
Undersized batteries risk:
- Insufficient cranking power
- Overheating during operation
- Premature failure from excessive discharge
Oversized batteries may:
- Cause terminal/sheet metal contact
- Overload charging systems
- Vibrate excessively without proper clamping
Always match group size, CCA, and terminal layout.
Expert Views
“Bobcat’s 26R battery spec isn’t arbitrary – it’s calculated against the MT85’s 74-horsepower Kubota V2203 engine requirements. We’ve seen 20% fewer warranty claims since switching to AGM batteries factory-wide. For extreme-duty cycles, consider upgrading to 800 CCA without exceeding case dimensions.”
– Construction Equipment Power Systems Specialist, Johnson Heavy Machinery.
Conclusion
The Bobcat MT85’s 26R 750 CCA battery delivers optimized power within tight spatial constraints. Proper maintenance and timely replacement ensure peak performance across temperature extremes. While aftermarket alternatives exist, OEM-spec batteries reduce compatibility risks. Always prioritize CCA over price when selecting replacements for this workhorse loader.
FAQ
- Q: Can I use a lithium battery in the MT85?
- A: Not recommended – the charging system isn’t calibrated for lithium chemistry. Stick with lead-acid or AGM.
- Q: How long does the MT85 battery last per charge?
- A: With proper maintenance, 3-5 years. Daily use requires nightly charging.
- Q: Does the MT85 have a battery disconnect switch?
- A: No factory switch, but aftermarket kits ($25-$50) can be installed to prevent parasitic drain.