The Belarus 250As: How Many Batteries Does It Need?

The Belarus 250AS is a discontinued tractor model built in Minsk, Belarus. It was originally priced at $8,000 in 1987 and is powered by a 2.1L 2-cylinder diesel engine. The tractor features a band brake system, an open operator station, and a power take-off (PTO) option. While it has received some positive reviews for its toughness, fuel efficiency, and low cost, it has also been criticized for its weight, electrical issues, and lack of power steering. In terms of battery configuration, some owners have reported using two 6-volt batteries wired in series to achieve 12 volts, while others have used a single 12-volt battery.

Two 6V batteries wired in series to get 12V

The Belarus 250AS tractor can be powered by two 6V batteries wired in series to get 12V. This setup is possible and will not cause any problems.

Connecting batteries in series increases voltage, so two 6V batteries wired in series will indeed output 12V. However, the amp-hour capacity remains the same. This means that the amperage of the two 6V batteries combined will be the same as the amperage of a single 12V battery.

It is important to note that when wiring batteries in series, it is best to use batteries with the same voltage and amp-hour capacity to minimize potential damage. Batteries from the same manufacturer and batch are ideal, as even batteries from the same production line can vary slightly. Additionally, battery age can affect voltage and amp-hour capacity, so it is recommended to replace all batteries at the same time.

In terms of charging, a 12V system can be used to charge the two 6V batteries wired in series as if they were a single battery. The charger connects to the positive terminal on one battery and the negative terminal on the other battery, charging both simultaneously.

One 12V battery

The Belarus 250AS tractor can be powered by one 12V battery. This is an alternative to the original setup of two 6V batteries wired in series.

The 12V battery should be the biggest one that will fit in the battery compartment. This will be sufficient to start the tractor, even in cold weather. The tractor's 12V starter means that a single 12V battery is adequate, and this setup is no harder on the starter than any other battery combination.

If you are using two 12V batteries in parallel, you may encounter the problem of one battery charging the other. This can be avoided by using a single 12V battery.

When installing a 12V battery, make sure to note the physical dimensions of your battery compartment, as well as which side is positive and which is negative. This information will be useful when purchasing a replacement battery.

Two 12V batteries hooked in parallel

The Belarus 250AS tractor is a 25-50 HP tractor that comes with two 6V batteries wired in series to get 12V. However, some users have reported using two 12V batteries hooked in parallel for their Belarus 250AS tractor.

Connecting two 12V batteries in parallel is a straightforward process, but it's important to do it correctly to ensure optimal performance and safety. Here's a step-by-step guide on how to connect two 12V batteries in parallel for your Belarus 250AS tractor:

• Use Identical Batteries: It is essential to use two new, identical 12V batteries with the same make, amp-hour (Ah) rating, and preferably the same manufacturing date. Connecting batteries with different Ah ratings or from different manufacturers can lead to imbalances and other issues.
• Prepare the Batteries: Before installing the batteries, charge them individually using a smart charger to ensure they have identical charges. This will help you get the most out of your batteries and prevent any potential issues.
• Connect the Batteries: Connect the positive terminal (usually red) of one battery to the positive terminal of the other battery using a suitable cable and battery terminal clamps. Then, connect the negative terminal (usually black) of one battery to the negative terminal of the other battery. Ensure that the connections are secure and tight.
• Consider Cable Size: Use cables that are the same size or larger than the existing cables connecting to your original battery. This will help handle the electrical load and prevent voltage drop.
• Route Cables Properly: Keep the cables connecting the batteries the same length and route them through the same hole in any metal bodywork to prevent elevated/quasi DC fields and other electrical issues.
• Avoid Connecting Both Batteries to the Chassis: Do not connect both batteries' earth connections to the chassis or bodywork of the tractor. Instead, link them to each other and have only one connection to the chassis or bodywork.
• Plan the Connections: Consider which battery you will connect the positive and negative leads to. In some cases, it may be better to move the negative (earth) connection to the new battery instead of the positive lead. Plan the connections carefully before making any commitments.
• Use Proper Terminals: Do not cut the cable strands to fit multiple heavy-duty cables into a single battery terminal. Instead, use specialist battery terminals designed to accommodate multiple cables.
• Upgrade Existing Cables: If you are adding a second battery to increase capacity, consider upgrading the existing heavy-duty cables to ensure they can handle the additional load.
• Safety First: Exercise extreme caution when working with batteries. There is a significant amount of energy stored in these batteries, and incorrect connections can result in short circuits, sparks, or even explosions. If you have any doubts, consult a qualified auto electrician.

6V batteries have thicker plates

The Belarus 250AS tractor can be powered by two 6V batteries wired in series to get 12V. 6V batteries have thicker plates, which allow them to withstand more abuse than their 12V counterparts. This is because 12V batteries have thinner plates that are more likely to lose their capacity over time and, consequently, their ability to hold a charge.

The thicker plates of 6V batteries enable them to be charged and discharged more frequently. This is why they are often used in deep-cycle applications, where they consistently outperform 12V batteries. 6V batteries also have a longer lifespan, which makes them a more cost-effective option in the long run.

Another advantage of 6V batteries is that they are smaller and lighter than 12V batteries. This makes them easier to handle and more likely to fit into tight spaces. Additionally, 6V batteries typically have larger amp-hour capacities, which means they can store more energy and provide a higher amount of power.

While 12V batteries are more commonly used in cars and trucks due to their high power output, 6V batteries are a better option when space is limited or weight needs to be reduced. They are also a popular choice for golf cart batteries, as their output is longer and they can provide a higher amount of power.

In summary, 6V batteries with thicker plates offer several benefits over 12V batteries, including increased durability, longer lifespan, smaller size, lighter weight, and higher amp-hour capacities. These advantages make them a popular choice for various applications, including RVs, construction lighting, and electric vehicles.

12V starter

The Belarus 250AS tractor has a 12V starter. It originally came with two 6V batteries, wired in series to provide the 12V needed. However, some people have replaced these with a single 12V battery, which works fine, although it may be a little harder to start in very cold weather.

If you are replacing the battery or batteries, you should check the physical dimensions of your battery compartment and the polarity (which side is positive and which is negative) to ensure your new battery fits and the leads are long enough. You should also check the voltage of your electrical system.

There are several 12V replacement starter motors available for the Belarus 250AS. When replacing the starter motor, it is important to match the specifications of the original motor, including voltage, rotation direction, and the number of teeth. Some examples of compatible 12V starter motors include:

• RAREELECTRICAL New 12V Gear Reduction Starter Motor
• VIPIH 9142780 12V Starter
• DB Electrical 410-42002 New 12V Starter

These replacement starters are available from online retailers and specialist tractor parts suppliers.

Frequently asked questions