Hey everyone, thanks for stopping by—if you’re here, you probably work with auxiliary systems, or are in charge of keeping them running smooth, and let’s be real, nothing kills a production day faster than a faulty auxiliary unit. I’ve been in this game for 12 years, running my shop as an auxiliary system supplier, and over that time, I’ve seen way too many folks skip basic maintenance and end up scrambling for emergency repairs at 2 a.m. Today I’m breaking down exactly how to keep your auxiliary systems in tip-top shape—no fancy jargon, just real, actionable stuff I’ve learned from working with hundreds of clients across manufacturing, HVAC, and even food processing. Auxiliary System

First off, let’s get one thing straight: auxiliary systems are the unsung heroes of just about any operation. They’re the water pumps, air compressors, cooling towers, and those little control panels that keep your main line, warehouse temp, or production equipment from locking up. I had a client a few months back, a small auto parts factory, that ran their auxiliary air compressor on “set it and forget it” mode for 18 months. One random Tuesday, it seized up mid-shift, and they lost $40k in parts that couldn’t get painted because the paint sprayers needed consistent air pressure. That’s the kind of hit you avoid with simple, regular checks, not just a full overhaul once a year.
Let’s start with the non-negotiable daily or weekly checks—these take 10 minutes max, and they save you hours of headaches. I know you’re swamped, so these can’t be time-consuming, right? First, visual inspections. Walk by every auxiliary unit you have and look for leaks—oil, coolant, air, even water. Leaks might seem tiny at first, but a single pinhole in a compressed air line can waste 20% of your system’s energy, according to industry data. Next, check pressure gauges and temperature displays. Most folks ignore these until the light flashes red, but even if they’re in the green zone, note any weird fluctuations. If your cooling tower’s temp jumps 5 degrees in a day, that’s a sign something’s off, not normal. For pumps, listen for weird noises—grinding, rattling, or hissing that wasn’t there last week. I keep a little notepad (or a notes app on my work phone) for each client’s units to jot down these small things, so I can spot patterns before they become big issues.
Then there’s monthly maintenance, which is a bit more hands-on, but still doable with basic tools. First, filter changes. I can’t stress this enough—clogged filters are the #1 cause of auxiliary system breakdowns. Whether it’s an air filter on your compressor, a water filter for your process pump, or a strainer on your cooling tower, every filter has a lifespan. Most people go by the “every 3 months” rule, but if you’re in a dusty warehouse, running 24/7, that timeline cuts in half. I tell my clients to tag every filter with the date it was changed, so they don’t forget. Last year, a bakery client tried to stretch a compressor air filter for an extra month because they “didn’t have time.” Turns out the clogged filter pushed dust into the compressor’s cylinder, costing them $12k in a replacement part. Ouch. Next, lubrication—every moving part in your auxiliary system needs the right lubricant, at the right level, at the right time. Don’t just use any oil, either. Compressors use special synthetic oil, not motor oil from your truck. Pump bearings need grease rated for high temperatures if they’re running nonstop. I always give new clients a quick cheat sheet for each unit’s required lubricants when they buy from me, so they don’t guess and mess it up. Also, check electrical connections monthly—loose wires or corroded terminals are a fire hazard, and they can mess with control panels. Just a quick tighten of connections with a screwdriver and a wipe with a wire brush takes 5 minutes, and prevents so many issues.
Now, the quarterly to semi-annual deep dives—this is where we stop reacting and start preventing. Let’s talk about system cleaning. Cooling towers get slimy with algae and mineral buildup, which reduces their cooling efficiency by up to 30% if left unattended. I’ve seen cooling towers that were so clogged, they couldn’t keep the plant’s temp below 80 degrees, making the whole main production line shut down in summer. For cooling towers, you don’t need to hire a fancy industrial cleaner every time—quarterly a quick flush with a mild, approved biocide will keep algae away, and semi-annual chemical descaling for mineral buildup works wonders. For air compressor intakes, a deeper clean of the intake housing removes built-up dirt that filters can’t catch. Next, load testing. Auxiliary systems that only run part-time (like a backup generator or a secondary pump) often get neglected because they don’t see use. But when you need them—say, a power outage—they won’t start if they’ve been sitting unused for months. Once a quarter, run any backup auxiliary units at full load for 30 minutes to test them. I had a manufacturing client whose backup generator died during a thunderstorm last winter because they never tested it. They lost power for 12 hours, ruining a batch of steel that was being processed. That’s a failure that’s 100% avoidable with a quick test. Also, check alignment for pumps and motors. Over time, vibration from running can throw a pump’s shaft out of alignment, which wears out parts fast and uses more energy. A quick alignment check with a basic laser tool takes an hour, and prevents premature wear.
Wait, let’s not skip the part about data tracking, because I know a lot of you use building management systems (BMS) now. Your BMS logs pressure, temp, and runtime, so use that! A lot of clients just look at the BMS when an alarm goes off, but if you review the weekly logs, you’ll see trends. For example, if your air compressor’s runtime jumps 10 hours a week without a change in production, that means it’s working harder than it should, probably due to leaks or a clogged filter. I work with my clients to set up custom alerts in their BMS—like a text alert if a pressure gauge drops below 80 PSI or a temp goes above 100 degrees—so you can catch issues before they become emergencies.
Now, I get it—some of you don’t have a full-time maintenance team, and if you’re a small business, hiring a third party for every check is pricey. That’s where knowing your limits comes in. Simple checks (daily/weekly) you can handle with basic training, but for the deep semi-annual stuff, or if you’re dealing with high-pressure systems or refrigerants, call in a pro. That’s me, by the way—my team does annual tune-ups and full system audits for clients who don’t want to handle the big stuff themselves. I always tell people: DIY maintenance is great, but don’t mess with stuff that requires certification. HVAC refrigerants, for example, need licensed techs to handle them, so don’t try to top off AC on your own if you’re not certified.
Also, let’s talk about storage if your auxiliary systems are seasonal. If you have a cooling tower or a chiller that only runs in summer, don’t just shut it off and walk away. Drain all water, clean the filters, add a rust inhibitor, and cover it to keep dust and critters out. I had a farm client that shut down their irrigation pump system for the winter and didn’t drain the lines. The water froze, cracked the pump casing, and they had to wait 2 months for a replacement right when planting season started. That’s a huge loss for a small business, and completely preventable.
One more thing—don’t wait for parts to fail before replacing them. A lot of people do “run it till it breaks” because they want to save money, but in the long run, planned part replacements are way cheaper than emergency repairs. For example, a compressor’s valve lasts about 5 years, so replacing it at 4.5 years for $800 is way better than waiting till it breaks, which will cost $3,000 in parts and labor, plus downtime. I always share recommended replacement timelines for all parts when I sell an auxiliary system, so my clients can budget for that and avoid sticker shock.
Wait, let’s circle back to that opening story about the auto parts factory. After that incident, I worked with them to set up a maintenance schedule: daily visual checks, weekly filter pressure checks, monthly lubrication and electrical checks, quarterly load tests for their backup air compressor, and annual tune-ups. Six months later, they called me because their compressor’s air filter was nearing the end of its life, and they caught it early—no downtime, no extra costs. That’s the win we’re all after, right?
At the end of the day, maintaining an auxiliary system isn’t rocket science. It’s consistency, paying attention to the small stuff, and not skipping the checks because you’re busy. If you’re feeling overwhelmed by your current system, or you need help setting up a custom maintenance plan, or you’re looking to upgrade your auxiliary units entirely, my team is here to help. We work with businesses of all sizes, from small local shops to large manufacturing facilities, and we tailor our support to what you actually need—no one-size-fits-all junk. Whether you just need a quick tune-up, help troubleshooting a weird noise, or a full system audit, reach out to us to discuss how we can keep your auxiliary systems running strong, no more 2 a.m. emergency calls or lost production.

And that’s it—simple, real, no fluff. The key takeaway? Small, regular checks beat big, expensive repairs every single time. Stick to the schedule, track the trends, and don’t be afraid to call in backup when you need it.
Brewhouse System References
- Compressed Air Challenge. "Best Practices for Compressed Air Systems," 2022.
- ASHRAE. "Auxiliary Equipment Maintenance Guide for Commercial Buildings," 2021.
- Pump Industry Association. "Preventive Maintenance for Industrial Pumps," 2023.
- International Refrigeration and Air Conditioning Conference. "Cooling Tower Efficiency and Maintenance," 2022.
Wenzhou Jinggong Machinery Equipment Co., Ltd.
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