If you're staring at a broken piece of shop equipment, getting your hands on a coats 2020 tire machine parts diagram is probably the only thing on your mind right now. There is nothing quite like the frustration of having a line of customers out the door and a tire changer that decides to quit on you. Maybe it's a slow leak in an air line, or perhaps the tabletop clamps just aren't gripping like they used to. Whatever the case, having a visual map of what's going on under the hood of that machine is the difference between a quick fix and a very expensive afternoon of guesswork.
The Coats 2020 is a bit of a legend in the tire world. It's a workhorse, built back when things were actually meant to be repaired rather than tossed in the scrap heap at the first sign of trouble. But because these machines are built so solidly, they often outlive the original paper manuals that came with them. If you've inherited an old 2020 or bought one used, you might find yourself looking at a complex assembly of valves, cylinders, and springs without a clue which part number you need to order.
Why You Need the Diagram Before You Start Tearing Things Apart
It's tempting to just start unbolting things and hope for the best. We've all been there. But with a machine like the Coats 2020, there are a lot of internal components—especially in the foot pedal assembly—that can be a real pain to put back together if you don't see how they were aligned in the first place. A parts diagram isn't just for finding part numbers; it's a roadmap. It shows you the "exploded view," which basically means it shows the machine as if someone hit it with a small, very organized stick of dynamite.
Seeing how the washers, spacers, and O-rings stack up in the air cylinders is crucial. If you put a seal in backward, you're just going to have to take the whole thing apart again thirty minutes later. Trust me, doing the job once is always better than doing it twice because you thought you could wing it.
Breaking Down the Main Sections of the Machine
When you finally pull up a coats 2020 tire machine parts diagram, you'll notice it's usually broken down into several main sections. This makes it a lot easier to navigate. You don't want to be scrolling through pages of tower assembly parts if the problem is actually under the tabletop.
The Tabletop and Clamping System
This is where the magic happens, and it's also where a lot of the mechanical stress occurs. The 2020 uses a system of slides and air cylinders to move those clamps in and out. Over time, the grease on the slides gets gummy or full of shop grit, and the seals in the cylinders start to dry out. If your clamps are moving slowly or inconsistently, you'll want to check the diagram for the internal cylinder parts. Usually, a simple seal kit can make a machine feel brand new again, but you need to know which version of the cylinder you have, as there were minor changes over the years.
The Swing Arm and Mount/Demount Head
The tower and the swing arm take a lot of torque. If there's too much play in the arm, you risk scratching a customer's expensive alloy rim. The diagram will show you the adjustment bolts and the bushings that keep everything tight. Also, pay close attention to the mount/demount head assembly. This is the part that actually touches the tire and rim. If the plastic protectors are missing or the head itself is bent, that diagram will help you identify the specific replacement head that fits the 2020's shaft diameter.
The Foot Pedal Assembly
If you hear a constant hissing of air coming from the bottom of the machine, it's almost certainly a foot pedal valve. These valves are the "brains" of the pneumatic system. They route air to the clamps, the bead breaker, and the tabletop motor (if it's air-powered). Inside those pedals are stacks of small O-rings and spacers. This is the one area where you really need the diagram. Trying to remember the order of seven different O-rings while your hands are covered in grease is a recipe for a headache.
Identifying Common Wear Items
There are certain parts on a Coats 2020 that are just going to wear out. It's not a matter of if, but when. By looking at the diagram, you can identify these parts ahead of time and maybe even keep a few spares in the shop drawer.
- Bead Breaker Pads: These take a beating. If the rubber or plastic is worn down to the metal, you're going to start marring rims.
- Air Hoses: The internal "spaghetti" of hoses can get brittle over a decade or two. Most diagrams will list the diameter of the hose, but you can usually just buy bulk pneumatic tubing as long as you have the right connectors.
- Filter-Regulator-Lubricator (FRL) Unit: This is that glass or plastic bowl on the back of the machine. It's supposed to oil the air going into the machine. If it's cracked or the regulator is stuck, your whole machine will suffer.
- Springs: There are various return springs in the pedals and the arm. If a pedal stays down after you step on it, the diagram will show you exactly which tension spring has snapped.
Tips for Reading an Exploded View Diagram
If you aren't used to looking at technical drawings, a parts diagram can look like a mess of lines and numbers. The trick is to find a "landmark" on the machine that you recognize. Find the main tabletop or the bead breaker arm on the drawing first. From there, follow the lines to the smaller components.
Each part in the diagram will have a reference number (like "Item 12"). You then look at the parts list on the side or bottom of the page to find the actual manufacturer part number. When ordering, always double-check if there's a "serial number break." Sometimes manufacturers change a part halfway through a production run, so having your machine's serial number handy is a lifesaver.
Where to Find These Diagrams Today
Since the Coats 2020 is an older model, you might not find the diagram front-and-center on the manufacturer's main homepage anymore. However, they aren't hard to find if you know where to look. Many equipment parts suppliers keep digital archives of these PDF files because they know people are still using these machines every day.
You can usually find them on the websites of companies that sell replacement tire changer parts. They want you to find the right part so you don't return it, so they provide the diagrams for free. Just search for your specific model and look for the "technical documents" or "parts breakdown" section.
Keeping Your Machine Running After the Repair
Once you've used your coats 2020 tire machine parts diagram to fix the immediate problem, it's a good idea to do a little preventative maintenance. Most of the issues that lead people to search for diagrams in the first place could have been avoided with a little oil and a lot of cleaning.
Make sure the oiler (the FRL unit I mentioned earlier) is actually dripping oil. If it's bone dry, your valves and cylinders are running "dry," which shreds seals in record time. Also, keep the tabletop slides clean. You don't need to go crazy, but wiping off the old, dirty grease and slapping on some fresh lubricant once a month goes a long way.
Wrapping It Up
At the end of the day, a Coats 2020 is a tool, and tools need maintenance. Don't let a complex-looking diagram intimidate you. It's just a puzzle, and having the picture on the box (the diagram) makes it a whole lot easier to put together. Whether you're replacing a major air cylinder or just looking for a tiny snap ring, that diagram is the best tool in your toolbox.
Take your time, keep your parts organized as you take them off, and keep that PDF pulled up on your phone or tablet while you work. You'll have that machine back in service and those tires mounting in no time. It's way better than spending thousands on a new machine when the one you have just needs a five-dollar O-ring and a little bit of your time.