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MRO Stop Blog

  • How to Ensure Your Donaldson Air Filter is Working Properly

    Many rely on Donaldson Air filter products for their property because of their quality materials and track record of fantastic performance. However, there are things you can do to ensure your filter is working in optimal conditions. This not only improves performance, but also can extend the life of your filter. Here are a couple things you should do to make sure everything is working properly:

    Perform Visual Inspections

    On a regular basis, take a look at your filter. If you see any visible damage, you should replace your filter immediately. If there is no visible damage, look for things such as dust leakage or damage to the seal itself. By doing this, you can tell when your Donaldson air filter needs to be replaced, but you can also see if any of the surrounding elements need replacing.

    Use the Right Filter for the Climate you’re In

    This might seem obvious, but many people forget this simple rule. Donaldson air filter products are designed for different environments. So, if you’re using a filter that is for an urban area, but you are in a more industrial area, it isn’t working properly. Be sure to take into account what type of environment you are in when installing a new filter.

    Make Sure Dirty Elements Are Clean

    While your filter might seem clean upon installation, if the surrounding elements aren’t clean, your filter won’t be working the way it should. Before installing, make sure the parts surrounding the element are clean. Removing the filter can dirty up these parts, thus leaving the dirt for the new filter. Also, when inspecting, make sure those elements are staying clean, or as clean as possible. While you can’t totally prevent it becoming dirty after installation, just make sure a mass amount of dirt and debris isn’t affecting your Donaldson Air Filter.

    Taking just a couple extra steps to ensure your filter is working properly can save you time, money, and even some frustration in the long run. A Donaldson air filter is a quality choice when deciding on a filter, so you’re in good shape as you install. For more on Donaldson products and more air filter information, visit There, you can get expert advice and find all of the products you need for a successful repair.

  • How Do Vehicles Benefit from Firestone Air Springs?

    While some have heard of air spring systems in their vehicles, many don’t know of the benefits they have. Air springs have a number of highly beneficial traits that help vehicles in a number of ways. Everything from replacement, wear and tear, and performance are assisted by your air spring systems. There are many kinds of air spring products, but one of the most trusted is the Firestone air springs product line. Here are a couple benefits that many people don’t realize about them:

    1) It Improves the Overall Ride
    The use of Firestone air springs, or any related system, help stabilize your vehicle. It gives it more effective turning, breaking, and handling in general. Also, if you tend to have larger loads in your vehicle, air springs help weight distribution tremendously.

    2) It Improves Other Areas of the Vehicle
    It isn’t just your handling that can benefit. Firestone air springs can help get more out of your tires and keep them from wearing out as easier. It can also keep your suspension from damage and misalignment.

    3) Replacing is Easy
    It’s easy to tell when your Firestone air springs need to be replaced. Visible cracking, distortion, and damage are the tell-tale signs that it’s ready to be replaced. All you need to do is periodic inspections to make sure your air springs are in top condition. Overall, using air springs means no set time frames and no guesswork!

    MROStop has a wide selection of Firestone air springs fit for any project. When it’s time to replace, just visit our site and order. If you aren’t sure about the benefits or what your vehicle needs, just talk to one of our friendly experts. They’ll help you find what part you need, suggest other things that can help out, or just give you advice on the parts you’re looking at. What’s even better, is you can talk to them by chatting online or by phone. Whichever way you choose, you’ll be able to find what you need conveniently by shopping at!

  • Graco Drum Pumps: Tips to Keep Equipment in Top Condition

    Graco Drum Pumps are a fantastic addition to any business or project. As a quality piece of equipment, they make reliable investment and lighten the workload. However, by not checking the pump and its additional components periodically, you’re throwing away money on your investment. Since you probably don’t want to replace your drum pump all that often, you should perform checks on the following and do maintenance as needed.

    Basic Inspections to the Pump
    This seems like a no brainer, but many people forget to just check on their pump! Look for loose items, broken parts, and visible damage that may go undetected on a day to day basis. Also, Graco Drum Pumps come with a manual. Sit down with it and see if there’s any preventative maintenance they suggest.

    Using the Right Hose
    Not using the right tubing for your pump can also cause damage. Graco Drum Pumps can be used for a variety of projects, making them an extremely versatile product. However, not using the right tubing can cause a significant amount of damage not only to the pump, but also to the liquid you’re using, and possibly to the employee coming in contact with the liquid.

    What Condition is Your Hose Clamp In?
    The clamp that goes around the tubing is extremely important in making sure the pump stays in top condition. Remember, Graco Drum Pumps are and investment and significantly aid in the time work can take. With a loose or broken clamp, pumps can work harder than they need to, causing stress and later breakage.

    Graco Drum Pumps have been a trusted aid in many businesses work processes for years. Investing in one of these products can really help your maintenance projects become more efficient and less time consuming. However, like any big investment, making sure your equipment is in top condition is key. Taking the time to regularly inspect your drum pump, along with its attachments, can be the difference between costly repairs and the small amount of time it takes to just check your equipment.

    If you aren’t sure what you should do to repair or complete preventative maintenance on any of your equipment, call on Our team of experts can help you at any time, getting your equipment back to working condition and you back to work.

  • Tips for Storing Your Donaldson Air Filter

    When replacing an air filter, using Donaldson Filtration is a quality choice. They make products for a number of jobs and needs, making a Donaldson air filter a great option for any project. However, sometimes we can harm our air filters before we even install them. This can then cause harm to your machinery, hurt product lifespans, and waste money. These are a few storage habits Donaldson recommends:

    1) Always store a filter in a box.

    Even the product itself individually wrapped and sealed, be sure to tape up the box. This can keep contaminants out and prevent your filter from transferring debris to your machine. Additionally, where you store your products can harm them. Metal shelves can cause condensation to form around the product. This then causes the Donaldson air filter to rust. When in doubt, be sure to keep your filter boxed and sealed until installation.

    2) Handle filters with care.

    Be sure to carefully move Donaldson air filter boxes to and from jobs. Be sure to secure them to and from jobs. If filters roll around, it could possibly damage them. Also, be careful when removing filters from their boxes. Handle them with care and watch out for any dust or dirt particles on the box. Wipe away any contaminants on the box before opening. This prevents debris from getting into the filter.

    3) Use filters in a timely manner.

    Obviously filters are not perishable, but they should be used in a timely manner. When possible use the oldest inventory first. This ensures that your filters aren’t becoming damaged by sitting there. Make sure product labels including manufacturing dates and product names are visible when selecting from the shelves.

    By keeping your Donaldson air filter safe before installation, you are preventing unnecessary maintenance and getting your money’s worth from the product. Remember, handling and storing your filters properly will ensure they will be a quality product for your machinery. For questions on Donaldson filters and any other products, call or visit MROStop today. Our experts and Resource Center can help you answer your questions and get back to work!

  • How to Tell if it is Time to Replace Your Firestone Air Springs

    Replacing your Firestone Air Springs is a crucial part of any maintenance plan. But knowing when to replace your air springs can sometimes be difficult to decide. The wear, any damage, mileage are all factors into when you should replace them. Ultimately, there isn’t a concrete answer, but these are some reasons that point to replacement.

    First thing’s first. Be sure to perform regular inspections. Take note of mileage, any damages to the Firestone air springs, and service notes. You may be able to establish some kind of pattern if you keep excellent records. However, pay attention to the vehicle’s maintenance guidelines. It may say at what mileage you should perform an inspection.

    Know what damage to a Firestone Air Spring look like.
    Misalignments, loose girdle loops, cuts, dropping, and over extension are all damages that can typically occur. Cracks, holes, and tears are other common signs too. You can examine these to really get an understanding of the type of damage your vehicle’s air springs have. Be sure to clean the bags with a solution to get the best view of any possible damage.

    How long you have had the air springs can also determine if you need to change them. If the Firestone air springs are original to the vehicle that you’ve been driving for a while, it’s probably time to change them. Also, some mechanics have noted that it is sometimes hard to replace your air springs all at once, so only one at a time might be changed. Keeping accurate service logs is a way to make sure that your air springs get changed properly.

    While many use Firestone air springs, there still isn’t a concrete timeline as to when you should change out your parts. Many experts say that replacement really does vary from vehicle to vehicle. However, keeping accurate logs of service and inspections is a great way to combat the unknown of air spring replacement. For more resources, products, and parts visit! We have experts who can help you find the right part and answer any questions you have.

  • Questions to Ask When Choosing a Graco Drum Pump

    Drum pumps are a very important part of many businesses’ equipment. When they break, you usually need to replace them as quickly as possible to get back on track. However, if you haven’t replaced a Graco drum pump before, this can be a daunting task. By answering these questions, along with talking with a mechanics expert, you can find the pump that is right for your job and get back to work.

    1. Decide how the Pump is Being Used.

    What kind of head and flow do you need to support?
    What chemicals are you pumping?
    Is the material of the pump you are looking at compatible for what you are pumping?
    These are some of the many things you need to know and look at before even looking at Graco drum pumps. Other things to think about are viscosity, fluid temperature, container size, and motor preferences.

    2. What Kind of Motor Do You Need?

    Depending on what you are pumping, its temperature, and what you are trying to accomplish all determine what kind of motor you need in your Graco drum pump. Types of motors include splash and explosion proof, enclosed, and air. Again, if you aren’t sure what you really need, talking to an expert can be helpful. Especially with this question!

    3. What Kind of Accessories Will your Pump Need?

    Between different hoses, flow meters, nozzles, lubricators, and strainers your pump may need one or multiple to keep them running properly. Take notice of what kind of pump you are using, read up on any articles, and see which accessories are recommended for the Graco drum pump you are using to find the best fit.

    When choosing a pump for your machinery, finding the right pump the first time can be crucial to operation. Just remember to think about the pump and how it is used, the motor needed, and any accessories you may need to purchase. When in doubt, it doesn’t hurt to talk to someone who has worked with Graco Drum Pumps to make sure what you’re using is compatible. For more or to talk to an expert, contact us at

  • Dents on Liquid Filters

    Dents on your filter may result in a cracked filter. These dents often come from an improper installation. Filters with dents should not be used, and filters dented after installation should be replaced as soon as possible. The cost of replacing a dented filter pales in comparison to the cost of any damages that could come out of a dented filter that fails while in use.

    Dents on Liquid Filters
    *Image courtesy of the Donaldson Hydraulic Filtration Product Guide

    Stress on filters often results from pressure pulses in the system. Pressure is regulated by a pressure regulating valve. This valve is spring operated and intermittently opens and closes to regulate pressure. Once pressure goes beyond the setting of the spring in the regulating valve, the valve will open and allow the liquid to flow through until the pressure is alleviated and the spring can expand to close the valve. This process is repeated without pause while the system is in use, creating a pulsing effect. Filter canisters are subjected to the same pulsation. However, unlike the spring in the pressure regulating valve, canister material is susceptible to failure after such fatigue.

    Filters are designed with a low carbon steel to resist fatigue and are formed so the stress created by the pulses in the system are equalized over the surface area of the canister. A dent provides an area of stress concentration where pressure pulses can greatly shorten the fatigue life of the canister.

    *Image courtesy of the Donaldson Hydraulic Filtration Product Guide

  • How Big is a Micron

    The Beta Rating System

    A beta ratio (symbolized by the Greek letter β) is a formula that is used to calculate the filtration efficiency of a particular fluid filter by using base data obtained from multi-pass testing. The purpose of a multi-pass test is to have a lab based procedure that will give one reproducible data that can be used to evaluate the efficiency of hydraulic filters. In a multi-pass test, fluid is continuously injected with a uniform amount of contaminant then pumped through the filter unit being tested. Filter efficiency is determined by monitoring the fluid contamination levels upstream and the contamination levels downstream of the test filter at specific times. An automatic particle counter is used to determine the contamination level. Through this process an upstream to downstream particle count ratio is developed, known as the beta ratio.

    The formula used to calculate the beta ratio is: Beta ratio(x)= particle count in the upstream fluid
    Where (x) is a given particle size

    For example: β10(c)=1000 represents that there are 1000 times more particles upstream than particles downstream that are 10µm or larger. The (c) indicates that the testing was done with APC’s calibrated with NIST fluid.

    Beta stability is the measurement of how well a filter is able to hold up its measured beta ratio when the pressure drops below normal standards. Ex: beta 200 stability=210 psid means that the beta ratio will not fall below 200 until it reaches 210 psid.

    How large is a micron?

    It is difficult to put the measurements and data one gets from the Beta rating system in perspective, particularly when the most of the particles are smaller than a grain of salt. The unit of measurement for these tiny objects, white blood cells, bacteria, and silt being just a few of these things, is often a micron. One micron is .0001 centimeter, or .001 millimeter. In fact, 40µm is the lower limit of visibility, any object that is smaller a person can’t see without the help of a microscope. Keeping all this in mind, it is easy to see how most people don’t really understand how miniscule objects measured in microns really are.

    A Chart of the Micron Sizes of Familiar Particles

    Screen Shot 2016-08-08 at 2.26.23 PM

    *Image courtesy of the Donaldson Hydraulic Filtration Product Guide
    A Grain of table salt: 100µm
    A Strand of Human hair: 80µm
    A Pin Point: 75µm
    The Lower limit of visibility: 40µm
    A White blood cell: 25µm
    Talcum powder: 10µm
    A Red blood cell: 8µm
    Can be felt with a fingertip: 5µm
    A Grain of Silt: <5µm
    The Smallest Bacteria: 2µm

  • Graco Electric Pump

  • Parker Fittings Explained: Vibra Seal

    Vibra Seal is a factory applied pipe sealant for tapered pipe threads. It is a tough, non-hardening sealant engineered to be pre-applied to parts.

    Adding VS as a prefix to a Parker Brass Division part number adds the Vibra Seal option. For example, a 1204P-4 90 Degree Male Elbow, 1/4" NPT Male x 1/4" Male, with the Vibra Seal option becomes part number VS1204P-4. A 216P-4 Hex Nipple, 1/4" NPT Male x 1/4" Male, with the Vibra Seal option becomes part number VS216P-4.

    Adding VS as a suffix to a Parker Tube Fitting or Hose Division part number adds the Vibra Seal option. Most fittings that are available with the Vibra Seal option are not stocked, so lead times can be several weeks. In cases where waiting isn’t an option, a standard fitting may be substituted with a liquid thread sealant applied in the field.

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