In heavy construction, downtime is often caused by things we can’t see. Thick layers of caked-on mud and dust can hide hydraulic leaks, cracked frames, and more until they result in a catastrophic failure. By implementing a systematic cleaning routine, fleet managers can improve machine cooling, protect sensitive electronics, and catch minor issues before they turn into expensive repairs.
In this guide, we’ll cover the ins and outs of washing your heavy construction equipment.
Why You Should Keep Your Heavy Equipment Clean
The primary benefits of maintaining a clean fleet are improved operating efficiency, reduced repair costs, and enhanced operator safety. In the field, a clean machine is often a reliable one.
Maximized Cooling and Thermal Efficiency:
Heavy equipment relied on consistent airflow to manage engine and hydraulic temperatures. When radiators and oil coolers become packed with dust or mud, their ability to dissipate heat drops significantly. Keeping these cooling stacks clean ensures your machine can operate within its optimal temperature range, which will protect the water pump, belts, and head gaskets from heat-related failure.
Reduced Component Wear and Tear:
Mud and grit act as an abrasive. When they are allowed to accumulate on the undercarriage, it can accelerate the wear of rollers, idlers, and sprockets. On excavators and dozers, packed mud can also increase track tension beyond OEM specifications, putting unnecessary tension on the final drive. By regularly removing this buildup, you extend the service life of these high-cost wear parts.
Better Diagnostic Visibility:
If your machine is covered in dried clay or mud, it becomes much harder to spot small issues such as a pinhole hydraulic leak, a cracked frame, or a loose bolt. Cleaning the chassis and engine compartment turns every wash into a preliminary inspection, which may allow technicians to catch small wear and tear or structural fatigue early on. Catching problems early may be the difference between a minor $50 part replacement and a $5,000 emergency field repair.
Operator Safety and Situational Awareness:
Safety is the most critical factor on any jobsite. Mud on steps and grab handles is a leading cause of slip-and-fall accidents. Furthermore, dirt on windows, mirrors, and 360-degree cameras severely limits an operator’s situational awareness. A consistent cleaning regimen ensures that all safety glass and sensors are clear, allowing the operator to navigate the site safely and efficiently.
How to Wash Heavy Equipment
While the steps for cleaning heavy equipment will vary according to the machine and the type of cleaning equipment you have available, the process is generally the same.
Steps for Cleaning Heavy Equipment
1. Prepare Your Wash Area
It’s important to note that heavy construction equipment should only be washed in a dedicated wash station. During cleaning, chemicals, grease, and other contaminated water will run off the machine and this wastewater must be properly treated and recycled. A proper cleaning station will consist of a closed system and a wash pad that catches the wastewater and handles it according to regulations and laws such as the Clean Water Act (CWA).This wastewater must be properly treated and recycled. Legally, it’s not allowed to run into soil or drains.
To begin the cleaning process, start by making sure your wash area is set up to properly handle wastewater and protect the surrounding environment.
2. Remove Caked Mud and Large Debris By Hand
Begin cleaning your machine by dislodging any large chunks of mud or debris by hand. During this step, you can use a steel pry bar or similar tool to clear stuck-on dirt and mud from your machine’s undercarriage and chassis.
Be careful not to damage your machine during this step. In particular, be sure not to puncture hoses or other soft components with a pry bar.
3. Rinse the Machine
Once you have cleared any large debris from your machine, you should proceed to rinse smaller debris from the machine, such as dirt and mud, using water. This step is best accomplished using warm water and a water cannon. But a pressure washer may also be used.
Beginning at the bottom of the machine, work your way around the undercarriage and then up to the chassis and exterior of the cab.
4. Apply Detergent
After rinsing smaller debris from the machine, you may begin applying your detergent or cleaning chemical.
Once again, you should work from bottom to top. Begin by applying detergent to the undercarriage, then move upward to the chassis and exterior of the cab. Focusing particularly on high contamination areas where grease and grime can accumulate faster such as the undercarriage, pivot points, and engine compartments.
5. Let It Soak
For best results, it’s important to allow your detergent to soak in before moving to the next step. This allows for the chemicals to penetrate the grease and break down hard clumps of dirt. While the amount of time your detergent needs to soak depends on the type of detergent, most cleaning solutions need to be left on for 15 to 30 minutes.
6. Rinse Off the Detergent
Once your detergent has finished soaking, begin rinsing it off from top to bottom using a water cannon or pressure washer. Consider avoiding hitting radiator fins, electrical connectors, or bearing seals with direct high-pressure spray as it may bend metal or force water into “sealed” components.
For especially greasy or grimy components, you may also consider using a washing brush during this step.
7. Clean Hoses and Tires
It’s best to wash rubberized components, such as hydraulic hoses and tires, last because they may require special detergent. Apply the necessary detergent to the rubberized components and let it sit for the required amount of time. Once finished, gently rinse the detergent from the rubberized components.
8. Allow the Machine to Air Dry
Once you’ve finished cleaning the machine’s exterior, allow it to dry in a warm spot. If you need to dry the machine quickly, you may also use an air compressor to dry its exterior.
9. Clean the Cab
Finally, clean the interior using a cloth and suitable cleaning agent.
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Wipe Down: Clean all hard surfaces including joysticks, dashboards, and the operator’s seat.
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Vacuum: Remove floor mats and vacuum them outside of the machine.
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Glass: Clean the inside of the windshield with a non-streak agent to ensure maximum situational awareness for the operator.
Environmental and Safety Precautions
When cleaning your machine, it’s important to follow relevant environmental regulations and take necessary safety precautions to protect both the jobsite and the personnel.
Environmental Compliance and Wastewater
Wastewater produced during the cleaning process should not be allowed to enter storm drains or run into nearby soil. Many of the chemicals used during the cleaning process, as well as the dislodged grease, are toxic to the environment. Therefore, it’s important that you only wash your heavy equipment in a designated wash bay capable of catching, treating and recycling the generated wastewater. Failing to do so can result in significant regulatory fines and environmental damages.
Personal Protective Equipment (PPE)
In addition to environmental considerations, you also want to be mindful of your personal safety while washing heavy equipment. It’s important to wear the necessary safety equipment during the cleaning process, such as thick gloves and safety glasses.
Many of the chemicals involved in the heavy equipment cleaning process are harsh and can cause irritation if they come into contact with your skin or eyes.
Popular Heavy Equipment Cleaning Methods
The right method for cleaning your machine depends on the machine’s condition and the specific components being cleaned. Often, a combination of these techniques is used for a comprehensive wash.
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Water Cannons (High Volume): These systems act like industrial blasters, engineered specifically for high-volume “mucking”. They deliver a massive stream of water at relatively low pressure to blast away heavy mud and dirt deposits quickly. They are typically found in dedicated, closed loop wash stations.
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Pressure Washers (High Pressure): While water cannons prioritize volume, pressure washers use intense pressure, typically between 2,500 and 3,000 PSI, at lower flow rates to dislodge built-up grease and stubborn grime. Hot water pressure washers are particularly effective for cutting through oily residues and “baked-on” material.
Cleaning chemicals and detergents are sometimes necessary in addition to spraying tools, especially when heavy layers of grease and grime have accumulated on the machine. These detergents work by breaking down the chemical bond between the grease/grime and dirt, allowing them to be easily removed with a pressure washer.
While water-based cleaning methods are by far the most popular way to clean heavy equipment, other methods are sometimes used, as well.
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Steam Cleaning: These units heat water to a boiling point, producing vapor up to 300°F. Steam is the superior choice for deep-cleaning intricate components like valves and pumps because it can dissolve grease and sanitize surfaces without requiring heavy chemical usage.
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Dry Ice Blasting: This non-abrasive method uses solid CO2 pellets propelled at high speeds. The pellets sublimate (turn directly to gas) upon impact, and create a “thermal shock” that causes contaminants to detach from the surface. Because it introduces no moisture, it is the safest way to clean sensitive electrical components, sensors, and control panels without risking short circuits.
Where to Clean Heavy Equipment
Most operators would prefer to clean heavy equipment indoors in a bay with drains. Since you can clean a piece of equipment indoors regardless of the weather, this is typically the preferred option. Unfortunately, most operators don’t have the option to clean indoors which means they must do so outside. Regardless of the location, the primary goal is containment of grease and fluid residue that may wash off the machine.
How Often Should You Clean Heavy Equipment?
Cleaning should be treated as a scheduled maintenance task rather than an optional chore. The necessary frequency varies depending on your jobsite conditions. There are some steps that should be taken regularly to prevent long term build up of dirt and grease.
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Daily Tasks: Clear loose debris and large chunks of mud from the undercarriage at the end of every shift to prevent “frozen” tracks or extensive tension. Use compressed air or low-pressure water to clean radiator fins daily on dusty sites to avoid overheating.
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Weekly Tasks: Perform a more detailed rinse of the chassis and exterior. Use this time to inspect for “weeping” hydraulic seals, loose bucket teeth, or cracked hoses that were previously hidden by dirt.
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Bi-Weekly / Monthly: Conduct a thorough cleaning and degreasing of the entire machine. A deep clean is especially important before scheduled preventative maintenance services as it allows technicians to perform more accurate inspections of the engine compartment and hydraulic systems.
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Post-Job or Pre-Storage: Always thoroughly clean a machine before it is transported to a new site or placed into long-term storage to prevent corrosion and ensure it is ready for immediate deployment.
Conclusion
Washing your heavy construction equipment regularly is a necessary part of keeping your fleet in good working condition. By keeping your fleet clean, you can reduce unnecessary repairs and downtime while enhancing operator safety.
While conducting a thorough cleaning of your equipment, you may notice the need to replace some of your machine’s parts. The EquipmentShare Online Parts Shop carries OEM and aftermarket parts for your entire fleet, making it easy to get what you need shipped right to you.
