The right battery ensures reliable starts, supports electrical systems, and extends overall equipment life. Using an incorrect battery can lead to weak starts, poor performance, and premature battery failure.
This guide provides a detailed Kubota tractor battery size chart covering the most popular models.
Kubota Tractor Battery Size Chart
BX Series (Sub-Compact)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| BX1870, BX1880, BX2370, BX2380, BX25D, BX23S, BX2660, BX2680 | 51R | Compact models; reversed terminal orientation (“R”); suitable for 12V systems. Typically 450-500 CCA. |
B Series (Compact Utility)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| B2320, B2301, B2601, B2650, B2920, B3030 | 24 / 24F | Reliable for small diesel engines; some variants accept Group 26R. 500-600 CCA recommended. |
L Series (Standard Utility)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| L2501, L3301, L3302, L35, L3560, L3901, L3902, L4060, L4600, L4701, L6060 | 24F / 27F / U1 / U1-7 | Medium tractors; higher-powered models benefit from Group 27F. L35 & L4600 use U1/U1-7 (340–495 CCA). L4701 & L6060 use 27/27F (600–700 CCA). L3400 uses Group 24/24F. |
MX Series (Utility / Ag)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| MX4700, MX5200, MX5400, MX5800, MX6000 | 24F or 27 | Designed for heavy use; larger group ensures longer reserve capacity. 600-700 CCA typical. |
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M Series (Mid-Size Ag / Heavy Duty)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| M4800, M5040, M59, M5M, M6030, M6060, M7040, M7060, M9580, M9960, M4-071, M5-111, M6-141, M7-134, M7-172 | 31 / U1 / U1-7 / U1-18 | High CCA for large diesel engines; commonly used in commercial operations. M59, M5M, M6030 use U1/U1-7 (495–740 CCA). M7040 & M9960 use U1-18 (650–960 CCA). Most others use Group 31 (700–1400 CCA). M7-134 requires 1400 CCA. |
GR Series (Lawn & Garden)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| GR2020, GR2120 | U1R | Compact garden tractors; smaller batteries with reversed terminals. 200-300 CCA suitable. |
T Series (Lawn Tractor)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| T1460, T1560, T1570, T1670, T1760, T1770, T1870, T1880, T2080, T2090, T2290, T2380 | U1 / U1R / U1-35 | Standard 12V garden batteries; lightweight and easy to replace. 230-400 CCA; fits models like T1460-T2380. |
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ZD Series (Zero Turn Diesel)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| ZD1211, ZD323, ZD326, ZD331, ZD1511 | 24 / 26R | Diesel zero-turns require moderate capacity for engine and deck systems. 500-600 CCA. |
Z Series (Gas Zero Turn)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| Z122R, Z125S, Z411, Z421, Z724, Z781, ZG20, ZG23, ZG222, ZG227, ZG327 | U1 / U1R / U1-8 | Suitable for gasoline engines; compact fit for mower chassis. 230-250 CCA; AGM recommended for reliability. |
RTV Series (Utility Vehicles)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| RTV500, RTV900, RTV1100, RTVX900, RTVX1120, RTV-X1100C, RTV900W6 | U1 / 26R | Smaller engines but higher vibration tolerance needed. Group 26R for diesel models like RTV900 (540-650 CCA); U1 for smaller variants. Dimensions approx. 9″ L x 7.8″ W. |
F Series (Front-Mount Mower)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| F2680, F3060, F3680 | 26R / 35 | Front-mount diesel mowers use mid-size batteries for stability. 500-700 CCA. |
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KX / U Excavators (Compact Equipment)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| KX040-4, KX057-5, U17, U27-4 | 24 / 27 | For Kubota construction machines requiring strong CCA for hydraulic systems. 500-800 CCA; ensure fit for compartment. |
SVL / SSV Loaders (Compact Track & Skid Steer)
| Common Models | Battery Group Size | Notes / Comments |
|---|---|---|
| SVL65-2, SVL75-3, SVL97-2, SSV65, SSV75 | 31 | Heavy-duty high-amp batteries ideal for demanding hydraulic and electrical loads. 950+ CCA recommended. |
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Choosing the Right Battery for Your Kubota Tractor
When replacing your battery, consider the following factors:
1. Voltage and Group Size
Almost all Kubota tractors use a 12-volt system. The group size (like 24, 27, or 31) determines the battery’s physical size and terminal arrangement. Always check that the replacement fits your tractor’s tray and cables.
2. Cold Cranking Amps (CCA)
CCA measures how well a battery can start the engine in cold temperatures. For most compact Kubota tractors, a CCA rating between 500 and 800 amps is adequate. Larger M-Series and construction machines may require 900–1000 CCA.
3. Reserve Capacity (RC)
RC indicates how long the battery can supply power when the charging system isn’t running. Machines with additional electrical accessories, like lights, cab fans, or hydraulic systems, benefit from higher RC.
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4. Terminal Orientation
Some batteries come in “R” (reversed) orientation, where the positive terminal is on the opposite side. Always check before purchase to avoid cable stretching or short-circuiting.
5. Operating Environment
If you frequently operate in cold climates or leave the tractor outdoors, choose a heavy-duty or AGM battery for better cold performance and vibration resistance.
Battery Maintenance Tips
To get the longest life from your Kubota tractor battery:
- Inspect regularly: Check terminals for corrosion or looseness.
- Keep it charged: If the tractor sits unused for long periods, use a battery maintainer.
- Clean terminals: Apply dielectric grease to prevent corrosion.
- Secure properly: Ensure the battery hold-down bracket is tight to reduce vibration damage.
- Store properly: If storing for winter, remove and keep in a cool, dry place, fully charged.
Most Kubota OEM or aftermarket batteries last between 3 and 5 years, depending on use and climate. Regular maintenance can easily extend that life.
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Final Thoughts
The right battery ensures that your Kubota tractor starts reliably, powers all accessories, and performs efficiently in any season. The chart above provides a comprehensive guide for the most popular Kubota models, from compact BX tractors to large agricultural M-Series units and even RTV utility vehicles.
When choosing a replacement:
- Match the group size and CCA to your current or OEM battery.
- Double-check terminal positions and tray dimensions.
- Invest in a high-quality battery designed for heavy-duty use.
