A close look at a Tommy Gate serial number plate — the key to identifying the right parts fast.

When your Tommy Gate quits mid-route in San Antonio, the first question every parts counter is going to ask you is simple: what’s the serial number? Without it, you’re guessing at models, waiting on the wrong parts, and losing a day of hauling. With it, most repairs move fast — often the same day. Whether you’re stuck at a jobsite off Loop 1604, sitting at a delivery stop on I-10, or trying to finish a run through the Hill Country before dark, the difference between a good serial number read and a bad one can mean the difference between rolling by lunch and sitting through the weekend.

At Ace Welding & Trailer Co., we’ve been servicing Tommy Gate liftgates in San Antonio and across South Texas for over 80 years. From our FM 1346 shop, our team stocks the most common Tommy Gate parts and can identify almost any Tommy Gate unit — G2 Series, Railgate, Cantilever, Original Series pickup gates, and flatbed models — by its serial number plate alone. We’ve walked hundreds of owner-operators, contractors, and fleet managers through the same steps we’re about to walk you through here.

This guide shows you exactly where to find your Tommy Gate serial number, how to read what’s on the plate, and what to do if that plate is missing, damaged, or unreadable — which happens a lot on gates that have been running South Texas heat and jobsite abuse for a decade. Whether you’re calling us for parts, ordering online, filing a warranty claim, or shopping a used truck, this is the fastest way to get the right answer the first time.

No job too big or too small — that’s been our promise since 1946.

Why the Serial Number Matters More Than You Think

Tommy Gate has built a wide range of liftgate models over the years, and even within a single family — say, the G2 Series — there are variations in capacity, platform size, hydraulic configuration, mounting style, and column height. Two units that look nearly identical from the back of a truck can take completely different pumps, cylinders, and control components.

That’s why every Tommy Gate repair, warranty claim, or parts order starts with the same information:

  • Model number
  • Serial number
  • Year of manufacture
  • Capacity rating

Get any one of those wrong and you’re waiting on a return shipment while your truck sits at our FM 1346 shop or in your yard.

Where to Find the Serial Number Plate on a Tommy Gate

Tommy Gate rivets a metal serial number plate to every liftgate at the factory in Woodbine, Iowa. On most units we see roll through the shop, you’ll find it in one of these locations:

  1. On the main column or lift arm — usually on the driver’s side, easy to see when the gate is stowed.
  2. On the frame or mounting bracket — check where the gate mounts to the truck body.
  3. Inside the pump enclosure — pop open the pump cover and look on the interior wall or on the pump housing itself.
  4. On the platform or platform hinge — especially on Original Series pickup gates and flatbed models.

If your Tommy Gate has been running South Texas heat, jobsite dust, and cross-border miles out of Laredo for more than a few years, the plate may be faded, scratched, or covered in paint overspray. Bring a flashlight and clean the surface gently with a rag before you write anything down. Aggressive scrubbing can wipe out what’s left of the stamping.

What’s Actually on a Tommy Gate Serial Number Plate

Every Tommy Gate serial number plate carries the same core information, though the layout has changed across model years. You’ll typically see:

  • Model number — tells you the family (G2 Series, Railgate, Cantilever, Original Series, flatbed) and specific configuration.
  • Serial number — a unique identifier for your specific unit.
  • Capacity — the rated lift capacity in pounds (commonly 1,300, 1,500, 1,600, 2,000, 2,500, 3,000, or larger).
  • Date of manufacture — sometimes stamped as a code, sometimes as a plain date.
  • Hydraulic and electrical specs — pressure ratings, voltage, and pump specs.

When you call our parts counter, we ask for the model number and serial number together. That combo tells us the exact hydraulic layout, cylinder bore, pump type, and control system — so we can pull the right parts on the first try and get you back on the road faster.

Decoding the Model Name

Tommy Gate uses model families that give you a quick read on the type of gate you have:

  • G2 Series — Rail-lift design and the modern workhorse of the Tommy Gate lineup, common on medium-duty trucks running the I-35 corridor.
  • Railgate — Steel rail-lift platform built for heavy-duty commercial use, popular on box trucks and stakebeds hauling out of San Antonio warehouses.
  • Cantilever — Folds flat under the truck for loading dock access, common in last-mile and beverage delivery.
  • Original Series — The classic Tommy Gate for pickup trucks and utility beds — a staple for contractors and landscapers across San Antonio and the Hill Country.
  • Flatbed models — Purpose-built for flatbed and stakebed applications, common on construction and equipment-hauling trucks.

The suffix numbers and letters after the family designation usually indicate capacity, platform size, and mounting configuration. If you’re unsure what your model designation means, snap a photo of the plate and text it to us at (210) 667-1171 — we’ll identify it and quote parts right from the message.

What to Do If the Serial Number Plate Is Missing or Unreadable

We see this all the time — especially on older Tommy Gate units that have been through 10+ Texas summers, jobsite abuse, or a repaint. Don’t panic. Here’s how we identify a mystery Tommy Gate at our FM 1346 shop:

  1. Measure the platform — width, depth, and folded height give us a starting point.
  2. Check the pump and motor — Tommy Gate stamps part numbers on many pump housings and motor casings.
  3. Look at the column and cylinder configuration — Tommy Gate’s column design, cylinder placement, and mounting geometry are distinctive enough that a trained eye can narrow the model down quickly.
  4. Photograph the whole gate — arm geometry, cylinder placement, and platform style tell us a lot.

If you bring the truck to our shop, we can usually pin down the exact model in under 30 minutes. For fleet accounts, we keep a log of every unit we’ve serviced so you don’t have to re-identify the same gate twice.

Real-World Examples from Our San Antonio Shop

A San Antonio-based landscaping crew running an Original Series Tommy Gate on a pickup called us after the gate stopped lifting mid-day. Because the driver snapped a photo of the serial number plate before pulling in, we had the correct pump and switch on the counter when he arrived. Fixed and back to work before the crew lost the afternoon.

Another customer, a contractor hauling equipment out of the New Braunfels area on a flatbed with a Tommy Gate rail-lift, brought in a unit with a faded plate that had been repainted three times. Our team identified it from the column geometry and cylinder mount pattern, sourced the right cylinder, and had it rebuilt in a day.

We also worked with a last-mile delivery fleet running G2 Series gates on a group of box trucks out of the Loop 410 corridor. One driver had been ordering the wrong parts online for weeks — turned out he’d been reading his serial number off the wrong sticker. One accurate plate read from our tech got him back on route the same afternoon and saved the fleet weeks of chasing the wrong components.

When to Bring It to Ace

If you can’t find your serial number plate, can’t read it, or aren’t sure what the numbers mean, don’t guess. Text a photo to (210) 667-1171 or bring the truck by our FM 1346 shop. We service Tommy Gate liftgates every week — parts on the shelf, mobile service available for fleets across San Antonio, the I-35 corridor, and South Texas, and 80+ years of local know-how behind every repair. You can also see the full lineup of what we handle on our San Antonio liftgate and trailer repair services page.

Conclusion

Reading your Tommy Gate serial number correctly is the single fastest way to get the right parts, the right repair, and the right answer from your service shop. Whether you’re calling us at Ace, ordering online, or filing a warranty claim, the model number and serial number are the two pieces of information that make everything else move faster.

If your serial number plate is missing, faded, or you just want a professional to verify what you’ve got, bring it to Ace Welding & Trailer Co. Our experienced team combines factory-level knowledge with 80+ years of local know-how to get you fixed right the first time.

Ready to get your truck back on the road? Call or text Ace Welding & Trailer Co. today at (210) 667-1171 or visit aceweldingandtrailer.com for a free quote. From our FM 1346 shop, we’ve been keeping San Antonio and South Texas trucks working since 1946 — no job too big or too small.