Three steps to effective gear oil maintenance

Gear oil is the cornerstone of industrial manufacturing machinery. Without effective gear oil, machinery is at an increased risk of break down as the result of poor lubrication. This results in expensive repairs and replacements, with a loss of productivity further exacerbating costs.

Unplanned downtime is clearly not desirable and the current economic climate across Europe only makes matters worse. A recent analysis of European industrial markets found that production is nine per cent below what it was prior to the recent recession. While some sectors such as machinery and equipment are keeping a positive CAGR (Compound Annual Growth), sectors such as mining and metalworking are experiencing negative growth rates. European businesses are now in a position where it is vital that they avoid downtime.

However, the process of lubricating gears is not as straightforward as simply buying an effective oil and putting it into a system. When inexpertly administered, the danger is that the oil becomes contaminated, potentially in just a few hours, and can be rendered ineffective. This would lead to elevated energy consumption and higher operating temperatures, which would normally lead in turn to a reduction in oil life.

This vicious cycle of fluid replacement becomes very expensive over time and isn't sustainable environmentally or financially. Fortunately, while the procedure is more complicated than just refilling machinery, it doesn't have to be too taxing. By following a three-step process, an effective oil maintenance programme can be as simple as one, two, three.

1. Good time for a change

The first step in ensuring that gear oil is changed effectively is establishing the best time to run the process. This is another example of a task that seems obvious, but it is alarming that only 20 per cent of oil changes actually happen at the right time. That leaves the majority of businesses either changing their oil too soon or too late.

On the surface this may not seem like a major issue, as changing oil too soon simply leads businesses to spend on new oil more frequently. However, replacing oil too late can be dangerous and expensive, causing increased gear wear that results in machine damage and the need for further maintenance.

So how do you know when the best time to change your gear oil is? You should take into account oil condition and contamination level, which requires that a sample be tested. This uses resources many businesses simply do not have available.

This is why NCH Europe developed the NCH Oil Service Program (NOSP), which allows us to analyse gear oil and identify the right time to change oil. NOSP also provides businesses with accurate reports each time a change is due, breaking down the results of the analysis and comparing the current sample with historical data.

By using advanced insight into gear oil, engineers can ensure that changes happen at the right time to avoid damaging machinery. However, in order to extend oil life and maximise performance, engineers must first clear away contaminants.

2. Flush and clean

One of the most commonly forgotten stages of the oil change process is cleaning the system before refilling with fresh oil. In fast-paced environments, it can be tempting to cut corners and opt for just refilling without cleaning.

However, this leads to oil that is ineffective and heavy with contaminants mere hours after use. These contaminants quickly form deposits on metal surfaces in the system, raising operating temperature and reducing power transmission through the gearbox.

To prevent this from occurring, it is imperative that engineers remember to clean their systems before replacing machinery oil. The most efficient and effective way is to use a cleaning product to dissolve the deposits and neutralise any acidic contaminants.

An effective system cleaning product, such as NCH Europe's Flush & Clean, works by being allowed to run through the system during a brief period of operation. This separates the deposits from the system surface, leaving them suspended in the old oil so they are removed during the oil change.

3. The right stuff

With the system flushed, the final step is the simple process of replacing the fluid with an effective gear oil. In order to choose an effective product, engineers must consider both the traits of the oil and the problems the application faces.

For example, if the gearbox is prone to accumulating condensation and rusting, it is important that the oil can address this. In this instance, we would recommend our Top Blend CS product. Top Blend CS employs a higher per cent of calcium-sulphonate technology that mops up acidity as a result of oxidation, it also contains demulsifiers that separate water from oil to keep gears properly and safely lubricated.

Similarly, problems such as foaming and oil oxidation can also be addressed by choosing a product that contains anti-foam agents and oxidation inhibitors, respectively.

For effective gear oil replacement, consideration must be paid at every step of the process to determining the best products for an application. This treatment should then be repeated for every subsequent refill.

It might not need a 300-page explanation, but it is clear that oil changing is not the simple process many consider it to be. With the right knowledge and products, boosting machine efficiency can be as easy as one plus one.

Find out more about the NCH Oil Service Program and other services and products at www.ncheurope.com/en.