5 Things to Know Before Buying Excavator V Belt

Excavators are among the most utilized machines you will likely encounter at any construction site. Their advantage is that they offer many classes, and the jobs that are offered can be diverse. Depending on the class of excavators and the construction project, the benefits that the excavators provide vary depending on the size of the project.

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 The Excavator has several tools mounted on it to enable it to accomplish several operations. Some of the standard attachments used with excavators include buckets, clamps, augers, breakers, and couplers.

Depending on the type of attachment, these machines can be used for digging, moving debris, lifting, etc. Since they are critical machines in many construction projects, the slightest hitch with any of the excavators can result in a project disruption.

Excavator Parts that Need Common Replacement

When it comes to excavator operation, environmental conditions have a powerful impact, and extreme environments mean the excavator part would wear out faster. Although the user manual of an excavator specifies the maintenance hours, it may no longer be accurate if the Excavator is operating in a challenging environment. To keep the construction operations running smoothly, you should keep the following excavator parts for replacement, as they are the most affected.

Air Filters

Air filters are designed to capture these particles and ensure they do not transverse into your machine’s engine. There are two parts to an hydraulic air filter: an inner and an outer filter. The inner filter is placed within the outer filter. The outer filter mainly serves the purpose of the first filtration stage, which is to remove most of the airborne particulate matter. The last one is the inner filter that helps not let any particles enter the engine at all costs. Outer filters are normally more replaceable than inner filters. Some signs may indicate that your air filters require replacement, which include poor engine performance, poor fuel economy, failure to ignite, weak sounds emanating from the engine, and warning lights. All the manufacturers advise that one should use a filter gauge to check whether the air filter requires replacement and to check them often to ensure there is a problem. It is always important to check your service manual for your Excavator; the manual will indicate the frequency at which you should replace the filters. New air filters range in cost from $15 up to $150.

Hydraulic Filters

Hydraulic filters help remove contaminants from hydraulic fluid. If the fluid gets dirty, the parts of your excavator hydraulic system will start getting damaged. Another symptom that indicates something is wrong with the hydraulic system is when power to the Excavator or its tools is cut. These signs should indicate a new hydraulic filter: low flow rates, low pressure, unusual sounds, slow movement of machinery, and hydraulic oil leaks. The replacement frequency may differ with the make and model of your Excavator, but most hydraulic filters need replacement every operating hours. New hydraulic filter prices range from $10 to $150, depending on your kind of Excavator.

Belts

Belts are critical to the performance of engines and hydraulic systems. They distribute power between engine components and other systems throughout the machine. Most engine belts fall into one of four categories: v-belts, serpentine belts, air conditioning belts, and fan belts. Symptoms that your belts may need to be replaced include apparent wear or damage, squeaking noises while the equipment is running, decreased power output, or poor performance. If your air conditioner’s belt fails, it will cease working. If your serpentine belt breaks, the entire machine will shut down. High heat can degrade the flexibility of rubber belts, causing them to slope.

Oil Filter

Gasoline filters remove impurities such as sand from the gasoline before it reaches the engine. If your machine hesitates or sputters, it could be time to replace the fuel filter. Other typical indicators your filter needs to be replaced include malfunctioning gasoline pumps, poor engine efficiency, and a misfiring engine. Changing your fuel filter at least once a year is deemed normal. Your machine’s service manual should include specified intervals for replacing your gasoline filters. New fuel filter prices range from $15 to $70, depending on the brand and model of your Excavator.

Seals

Seals are important in joining two surfaces and also protecting equipment from any fluid or gases that may leak. Two of the most common types of seals are gaskets and o-rings, which are used in hydraulic systems, engine parts, and pipe connections, among other applications. Common issues such as wear, high pressure, and heat erosion are likely to damage seals that are non-airtight or liquid-tight. Seal prices may vary from $1 to $100.

Conclusion

The correct replacement spare parts are essential for maintaining your Excavator’s efficiency and longevity. Investing in crucial components like hydraulic filters, track chains, undercarriage parts, and engine belts can prevent costly downtime and extend the life of your machine. Regular maintenance and timely replacement of these parts ensure your Excavator rates at peak performance and protect your investment in the long term.

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A V-belt is a wedge-shaped belt manufactured out of a rubber compound, reinforced with a tensile cord specifically engineered to transmit power into movement. V-belts can be found in driving mechanisms, such as engines in air compressors, fans, and pumps. They are available in a variety of sizes and materials to meet the needs of particular applications.

V-Belt Product Types

There are several possible types of V-belts available:

• Light Duty - Suitable for light-duty applications normally using fractional horsepower motors.
• Classical Heavy Duty - Wide range of sizes.
• Molded Cogged - Cogs allow the use of smaller diameter pulleys and provide heat dissipation; Raw Edge Sidewalls prevent slippage.
• Wedge - Narrower, deeper profile with higher power capacity than classical v-belt; allows for smaller, more compact drives.
• Wedge Cogged - Same properties as Wedge, but cogged for greater flexibility and heat dissipation.
• Banded – Two or more v-belts joined to form a single belt allowing the belts to function as a single belt with equal load distribution and wear.

How to Identify a V-Belt?

Belts with Branding

If the branding on the v-belt is still intact, the easiest way to identify it is to simply read the part number. Unfortunately, after hours of use, the brand is often worn off and not legible. In this case, it becomes necessary to take note of the dimensions of the belt.

Belts without Branding

You then need to find the measurements for your V-belt. The following steps will allow you to do so:

Step 1: Determine Belt Cross Section

V-belt cross sections are categorized based on their top width and depth measurements. Each width/depth combination is labelled using a letter of the alphabet. For example, v-belts with 21/32 in. width and 7/16 in. depth are labelled a "B" belt. Specially designed Browning V-Belt Rules are also available with a gauge to help you select the correct belt type. 

Step 2: Identify Belt Construction

V-belts are available in either wrapped or raw edge styles. A conventional wrapped v-belt will have an envelope of rubberized fabric covering the belt. A raw edge cogged v-belt will have exposed rubber sidewalls and moulded cogs on the bottom that resemble teeth. The following characteristics may also be present, depending on the construction type:

1. Rubberized fabric cover – Cover envelopes the entire belt and protects the belt core.
2. Top fabric – Provides heat and oil resistance.
3. Load carrying section – Cords (also known as tensile members) give the ability to transmit power and ensure uniform load distribution.
4. Compression section – Elastomer resists compression fatigue and dissipates internal heat build-up, providing firm lateral pressure against the sheave/pulley sidewall and distributing the load to the cords.
5. Precision molded cogs – Provide additional flexibility, allowing for the use of smaller pulley diameters, and aiding in heat dissipation.

Step 3: Measure V-belt length

The most difficult part of identifying a v-belt is measuring the length. There is no precise method that is practical to perform in the field for v-belt measurement. Precise measurement requires a measuring fixture with pulleys of prescribed dimension and the ability to apply a specific tension to the belt according to ARPM (Association for Rubber Product Manufacturers) standards for the given belt section.

Additionally, there are several terms used in the industry to describe length (e.g. inside length, outside length, pitch length, effective length) making it very confusing. 

Some belt providers instruct end users to utilize tapes to measure outside length. While this method can approximate belt length, it can still be off by inches. If the drive has ample installation and take-up range, using a tape can yield a belt that will fit the drive in many cases, however, there is no guarantee it is the optimum length designed for the drive. 

Contact Megadyne Application Engineering, who will work with you to perform the drive analysis and ensure the belts we deliver are the best choice for your application.

Step 4: Label the Drive

Finally, to avoid the issue of identifying the v-belt each time it needs to be replaced, a good maintenance practice is to properly label the drive with the correct belt part number. Use an adhesive sticker or any type of permanent signage where you can easily read the belt part number, making it easy to obtain belts in the future. Recording the date when the belts were installed can also enhance your maintenance program with increased uptime by knowing when to replace belts before they fail. 

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