The Most Important Preventative Maintenance Tips For Your RV

Mainline Truck Team • September 25, 2023

Having an RV or camper can be one of the most joyous things you own, an invitation to explore the wilderness and have outdoor adventures whenever you've got free time... Or it would be if it wasn't stuck in a motorhome repair shop!


RVs are highly complicated vehicles, with a lot that can go wrong. They aren't exactly fragile, but they're still easily damaged - and as an RV owner, you should be looking for ways to prevent that from happening. Anyone with a camper should understand the basics of preventative maintenance, and understand that they do need to stay on top of it if they want to prevent needless damage and repair jobs.


So in this article, let's talk about RV care and maintenance. A little extra time spent taking care of your camper can prevent a lot of expensive repairs.


Six Must-Do RV Preventative Maintenance Measures

1 - Maintain your window and door seals

Water leaks are among the worst threats to RVs because water damage can wreak havoc on the interior. Water can easily get into the walls and carpeting, leading to mold and mildew, or even start to break down the structural elements within the frame. If there's anything in the camper made of wood, that too will quickly succumb to water damage.


So you should regularly check your door and window seals, to ensure they're still sealing properly. The seals should still be flexible and supple. If they've dried out, they won't form a watertight bond when closed. Remember to check all the windows, including the ones in the back. Water can sneak in from anywhere.


If you suspect water has gotten in, look for streaks or discoloration on the interior walls. The signs of water damage are pretty similar to water damage in a house.

2 - Is your roof still properly coated?

The other main way that water can get into your RV is via the roof. Since the roof is completely exposed to sun and rain, it can easily become damaged by the weather. Because of this, it's treated with weather-resistant coatings at the factory, but these coatings will wear down over time.


So keep an eye on your roof, and if it looks like the slightly-shiny coating is wearing off, get it replaced ASAP. Also, if you see signs of water damage near the top of the camper's interior, that's likely to have come in through the roof.

And still on the topic of water damage...


3 - Keep humidity out of your camper

The other way moisture can get into your RV is through humidity in the atmosphere. If you frequently drive through humid regions, that can easily transfer enough moisture into your carpeting and walls to do damage or encourage mold growth.

The key here is to have proper airflow within the camper and ensure your air conditioning system is always in good shape.


You need to keep a constant flow of air to prevent moisture from starting to do damage to the interior. 


You might also want to look into improved roof vents from your local motorhome repair shop, to encourage more airflow, or even install a dehumidifier if it's always humid in your area.


4 - Always keep an eye on your tires

Your tires may be the single most important component of your RV when it comes to on-road safety. They determine how well your camper can grip the road - which is particularly important, given how prone RVs can be to roll over. So you need to be constantly checking on your tires, to ensure they're in good shape.


We strongly recommend checking your tires every day when your RV is in use. You want to make sure the tire pressure remains within manufacturer specs. This means you should have an air pressure gauge and a portable tire inflator in your camper at all times. After all, if you get a flat in the middle of a state park, you've got to take care of it yourself.


Also frequently check the tread depth, around once a month. Technically, they can be run on tread depth as low as 2/32" - but that's still a risk. Realistically, once your tires get below 4/32" tread depth, it's time to look into replacing them.


5 - Get your wheel bearings serviced frequently 

The bearings inside your RV's wheel assembly are subject to a lot more stress than a standard car or truck - which is often a problem because most RVs are built on top of stock truck chassis. So, the bearings are more prone to wear than on other vehicles.


You should check the bearings roughly once per season, or whenever you're pulling out your RV after an extended time in storage. Make sure they aren't damaged properly greated with and refill them with wheel bearing grease to ensure smooth rotation.


6 - Keep rodents out

Rodents love to make a home out of your motorhome - particularly if you're storing it for long periods, such as over the winter. The problem is, of course, rodents habitually chew on things. The amount of damage they can do in just a month or so is almost impressive, not to mention making a mess with their nests and droppings.  So it's critical to keep rodents and other critters out of your camper, as best you can.


When storing the RV you should strongly consider using spray foam to fill up all the small holes which can provide entry into the RV, such as wire holes, gas lines, etc. Yes, this will need to be cleaned out afterward - but that is typically going to be much cheaper and easier than dealing with repairs after rodents chew through your camper.


Maintain Your Camper At Mainline RV & Truck Service!


Drivers from across Ohio come to Mainline RV & Truck service thanks to our huge selection of parts, suspension upgrades, and our highly trained service staff. We're always happy to give your RV a checkup, and we can be your go-to motorhome repair shop whenever there's a problem.


Click here to schedule a service appointment!

Contact Us

April 27, 2026
Stop the "white-knuckle" driving! Learn what causes motorhome porpoising and how professional RV suspension upgrades can restore safety and comfort to your ride.
April 21, 2026
Don't let your RV generator die from disuse! Learn why "exercising" your Onan generator prevents costly repairs and keeps your motorhome ready for the road.
April 13, 2026
Safe stopping is as vital as engine power when towing a heavy load. Many truck owners overlook trailer brakes until an issue arises. At Mainline RV & Truck Service , we handle various towing setups, primarily electric and surge brakes. Both systems stop a trailer safely, but they operate differently and require separate trailer maintenance approaches. Understanding these differences is essential for road safety. We offer an expert comparison, including specific maintenance needs. Understanding the Fundamental Differences Before discussing what keeps them running smoothly, we should look at how the two systems operate. Electric brakes get their power from an electrical signal sent from the tow vehicle. Pressing the truck’s brake pedal tells the brake controller to send electricity to powerful electromagnets inside the trailer’s drum brakes. These magnets engage an armature plate, which then forces the brake shoes out against the inside of the drum. Surge brakes use hydraulics and work on their own, independent of the truck’s electrical system. Their operation is based on inertia. When the truck begins to slow down, the trailer pushes forward into the hitch. That physical pressure compresses a master cylinder built into the trailer coupler, which then pumps hydraulic fluid to the brake cylinders or calipers. Because one system is powered by electricity and the other by fluid pressure, their weak points and overall maintenance needs are very different. Electric Brakes: Fine-Tuning and Electrical Integrity Electric brakes are standard equipment for nearly all travel trailers and large, heavy-duty flatbed trailers. Since they depend on a good connection between the truck and the trailer, maintenance starts right at the hitch and extends all the way to the brake shoes. Adjusting the "Gain" on Your Brake Controller A key part of operating electric brakes is a setting that you control from inside the truck’s cab, not on the trailer itself. The “Gain” value on your brake controller sets the amount of electrical power sent to the trailer brakes. If the gain is set too low, the truck does all the braking work, which leads to your truck’s rotors getting too hot and your stopping distance increasing. Setting the gain too high means the trailer brakes will lock up easily. Routine truck trailer repair and safety checks involve resetting the gain any time the weight of your load changes significantly. A carefully adjusted gain ensures the truck and trailer brake together, preventing unnecessary stress on either vehicle. Troubleshooting "Grabby" or Locking Brakes A common complaint is that the trailer brakes feel “grabby,” meaning they engage too suddenly or violently with only a little pedal pressure. Often, something is causing a maintenance issue. Common reasons include: Corrosion on the electromagnets: If the trailer has been sitting unused, rust can form and cause the magnets to stick when engaged. Incorrect Gain settings: As mentioned earlier, improper calibration is a frequent culprit. Grease on the shoes: A failed wheel seal can let grease leak onto the brake components, leading to unpredictable braking action. During a professional trailer repair inspection, mechanics remove the drums to check that the magnets are wearing evenly and confirm that no oil or debris is contaminating the friction surfaces. Surge Brakes: Hydraulic Health and Fluid Management Surge brakes are most frequently seen on boat trailers (where electrical parts and water do not mix well) and on rental trailers (because the tow vehicle does not need a specialized controller). Checking Fluid Levels for Surge Couplers Surge brakes primarily fail due to low hydraulic fluid. As the master cylinder in the trailer's tongue or coupler is exposed to constant movement, seals wear, and moisture can enter the system. Routine maintenance requires checking the master cylinder reservoir fluid level; dark or cloudy fluid indicates moisture contamination, necessitating a full flush and replacement. Without sufficient, clean fluid, the surge coupler cannot generate the force required to activate the brakes, leaving the trailer brakeless. Inspecting the Moving Parts of the Coupler Since surge brakes work by the physical “sliding” movement of the coupler mechanism, that sliding part must be kept lubricated and clean. If the coupler rusts or jams up, the brakes might stay applied even when you are driving, or they may completely fail to engage when you slow down. The Common Ground: Shoe Adjustment and Wear The way the brake shoes are moved might be different, electricity for one, hydraulics for the other, but the shoes themselves need manual upkeep in both systems. Shoe Adjustment Intervals for Heavy-Duty Trailer Repair While some newer trailers feature self-adjusting brakes, many heavy-duty models still need manual adjustment. As the friction material on the brake shoes wears away, the space between the shoe and the drum increases. The result is a noticeable delay in braking response. For dependable safety, we advise having your brake shoes inspected and adjusted every 3,000 to 5,000 miles. During a trailer maintenance appointment, a technician uses a “star wheel” adjuster to move the shoes closer to the drum. This ensures that the trailer brakes immediately when you press the pedal. Which System is More Maintenance-Intensive? Surge brakes demand hands-on maintenance (checking fluid/grease). Electric brakes risk less obvious electrical failures (wiring, fuses, ground). For heavy loads, electric brakes offer a manual override for sway correction, but require electrical knowledge for troubleshooting. Surge brakes are simpler for the driver but need constant hydraulic system vigilance to prevent failure. Summary Checklist for Trailer Safety Keep your trailer operating at its best by following these simple guidelines: Annual Inspections: Have a certified professional examine your brakes and wheel bearings at least once a year, regardless of how many miles you have driven. Test Before You Tow: Always perform a quick “tug test” to confirm the brakes are working before you get out on the road. Watch for Corrosion: Check the 7-way electrical plug (for electric brakes) or your brake fluid lines (for surge brakes) for any signs of rust or damage. Listen: Squeaking, grinding, or clicking sounds are the most immediate indicators that truck trailer repair is necessary. Contact Mainline RV & Truck Service for Trailer Repair & More! Taking care of your trailer brakes is about more than just protecting your equipment; it directly impacts the safety of everyone sharing the road. If you are struggling with a malfunctioning brake controller, a leaking surge master cylinder, or you simply need a routine adjustment of your brake shoes, the experts at Mainline RV & Truck Service are ready to assist. We specialize in comprehensive trailer maintenance, truck trailer repair, and heavy-duty trailer repair services. Don't leave your stopping power to chance. Contact us online today .
By Mainline Truck Team March 10, 2026
Learn how to identify alignment vs. suspension-related irregular tire wear and enhance safety and performance. Call Mainline RV & Truck Service today.
By Mainline Truck Team March 2, 2026
Learn the importance of air brake winterization in Ohio, along with proven strategies to keep your system functioning. Contact Mainline RV & Truck Service.
By Mainline Truck Team March 2, 2026
Learn what black, white, and blue smoke from a diesel exhaust mean and when you need to seek semi-truck repairs. Contact Mainline RV & Truck Service.
By Mainline Truck Team January 5, 2026
Discover why the 3,000-mile rule is a myth and how to set the right truck oil change interval for your fleet. Contact Mainline RV & Truck Service today.
By Mainline Truck Team December 24, 2025
Learn what to expect from a commercial truck shop, from quick fixes and full services to fleet-focused value. Contact Mainline RV & Truck Service today.
By Mainline Truck Team December 24, 2025
Learn the essentials of heavy-duty truck service that improve performance, reduce downtime, and extend lifespan. Contact Mainline RV & Truck Service today.
By Mainline Truck Team December 22, 2025
Learn how to back up a motorhome with these expert tips, essential tools, and confidence-building strategies. Contact our motorhome repair shop for more.