Quick Navigation Overview Specifications

Coats 81855851 Air Valve for Robo Helper Arm Control

Your Robo Helper Arm is only as good as the valve controlling it. When that hand valve gets sticky or wears out, precise arm control turns into guesswork, and guesswork on a tire changer costs you time on every job.

The Coats 81855851 Air Valve is the OEM hand-controlled valve built specifically for the Robo Helper Arm on APX and select Baseline tire changers. It also fits the Coats 550 Heavy Duty Tire Lift, so if you're running more than one piece of Coats equipment, this part covers you across the shop. The handle is included, so you get smooth, comfortable control right out of the box. No aftermarket guesswork, no compatibility questions. It's the same valve Coats built into the equipment, made from metal and plastic components that hold up under daily shop use.

Buying OEM here matters. A generic valve might fit close enough, but "close enough" isn't what you want on a component you're actuating dozens of times a shift. Order the exact part number your machine calls for and get back to changing tires instead of troubleshooting air controls. GSG keeps OEM Coats parts like this one in stock and ready to ship, so downtime waiting on a valve doesn't turn into downtime waiting on a supplier.

Specifications

GSG Part Number 81855851
OEM Part Number 550HV-APX
Product Type Hand Controlled Air Valve
Compatibility Robo Helper Arm on APX and Baseline Tire Changers, Coats 550 Heavy Duty Tire Lift
Material Metal and plastic components
Operation Hand-controlled
Weight 1.5 lbs

Ready to Order

The exact valve your Robo Helper Arm needs, in stock and ready to ship. Add it to your cart and get your tire changer back to full control.

About the Brand

Coats Company

View All Coats Company Products

Garage Supply Guys Frequently Asked Questions

If something's not working out, just let us know. Keep in mind that some items might have a restocking fee. Check the product page for the specifics.
No worries, we've got you covered. We can send replacement parts or arrange for a new delivery. Just make sure to inspect everything when it arrives and give us a heads up right away if something's off.
All the details are at the bottom of our site under Shipping & Return Policy. You'll find everything about returns, freight damage, and any brand-specific rules.
Most larger items like car lifts and heavy equipment ship free, but depending on the brand there might be freight costs. Smaller items almost always have shipping fees via UPS, USPS, FedEx, etc. We'll show you any extra costs before you check out.
Shipping estimates are just that — estimates, and they're not guaranteed. Weather, freight delays, and carrier issues can throw things off, especially with bigger items. If you're on a tight timeline for installation, it's smart to give yourself some wiggle room.
Yep! Once it ships, we'll email you the tracking info so you can keep tabs on your delivery and plan accordingly.
We always send tracking info once your order ships. If it's been more than five business days and you haven't heard anything, just shoot us a message at support@garagesupplyguys.com or hit us up through the Contact Us page. We'll figure out what's going on.
Make sure whatever you're buying will actually fit your space. That means checking ceiling height, floor space, power requirements, and whether freight delivery can even get to your location. Trust us, it's way easier to confirm these details upfront.
Read through the product details carefully, especially for heavy or specialized items. If you're not sure about fit, shipping, installation, or anything else, just ask. We'd rather help you get it right the first time.
You'll get a confirmation email right away once you place your order. For most items like car lifts, parts, and shop tools, we'll have them shipped out within five business days if they're in stock. This goes for all major brands and replacement parts.
We don't offer installation services ourselves, but we can put you in touch with qualified installers in your area who you can work out pricing with directly. We can also handle this for you after your purchase.
Just reach out to us after your purchase and we'll connect you with trusted installers in your area. You can negotiate pricing and scheduling directly with them, or we can help coordinate the whole process for you.
Some items can be installed by experienced DIYers, but larger equipment like car lifts typically require professional installation for safety and warranty reasons. Check the product specifications and manufacturer requirements before deciding.
Yes! We're authorized dealers for all the major brands we carry. This means you get full manufacturer warranties, genuine parts, and proper support. You can always verify our dealer status directly with the manufacturer if you'd like.
It means you're getting the real deal - genuine products with full manufacturer warranties, access to official support, and the peace of mind that comes with buying from a legitimate dealer. No gray market products or void warranties here.