To avoid damage, frustration and waste, learn how to choose and apply the correct grease with these step-by-step instructions.
How to use a grease gun
First and foremost, make sure the grease you’re using meets the specifications given in the owner’s manual or service manual. Most applications specify either NLGI #1 or NLGI #2 grease. NLGI #1 is typically reserved for cold-weather applications since it’s a little softer and easier to pump.
Your application may also specify using a grease that meets the GC-LB specification, which is a common spec for automotive bearings.
Different greases use different base oils and thickeners, which can be incompatible. Mixing incompatible greases can cause the grease to break down and fail to provide adequate lubrication. When changing greases, clean the equipment of the old grease when possible or flush it with a liberal amount of fresh grease while the mechanism is in operation. Closely monitor the system for any inconsistencies.
Keep it clean
Maintaining a clean work environment is important when greasing equipment. Wipe grease fittings clean prior to injecting grease to prevent contaminant ingestion. Wipe the fitting after greasing, too. Finally, wipe excess grease off the gun nozzle and cover it with a cap to keep it clean during storage.
Avoid over-greasing
Proper greasing requires little or no weight behind the grease gun handle. As soon as you feel backpressure, stop greasing. Backpressure means the cavity is close to, or completely full. Adding a few extra shots of grease typically does more harm than good.
Some grease guns are capable of producing pressures as high as 15,000 psi. This greatly exceeds the pressure most bearing seals are designed to withstand. Over-greasing can easily rupture seals, which leads to increased friction, heat and, eventually, expensive maintenance and downtime.
Some greases are harder to pump than others by design. And some applications, like pins and bushings, require more force to push the grease into place. However, if you have to stand on the handle or get a cheater bar, something is wrong with your system.
Use high-quality grease
Finally, make sure you use a high-quality grease, like AMSOIL synthetic grease. We formulate our greases with durable synthetic base oils and high-quality thickeners so they provide excellent adhesion and wear protection. They withstand heavy loads, remain in place despite rigorous use and fight corrosion to promote long component life.
Consult AMSOIL Technical Services (tech@amsoil.com or 715-399-TECH) to identify the correct AMSOIL grease for your specific applications.
