Trailer & Vehicle Restraint Repair in Boston, MA
For trailer and vehicle restraint repair in Boston, MA, call (385) 325-7138 if a dock lock will not engage or release, or the communication lights are showing the wrong state. Tell us the facility location, the bay number, and whether a trailer is held on it right now. This is dock restraint equipment at commercial buildings — not semi-trailer roadside repair and not trailer cargo doors.
Call to describe the problem—if the door is stuck open or the dock is down, say so first.
Independent service-request website. Calls may be shared with an independent commercial dock-and-door repair company. That provider confirms availability, scope, pricing, and service terms.
Facts checked: September 21, 2026.
What a vehicle restraint is, and which kind you have
A vehicle restraint is a powered device mounted at the face of the dock that holds a trailer in place while a forklift is on it. It goes by several names — trailer restraint, truck restraint, dock lock — and it is a different thing from a wheel chock, which is a wedge somebody places by hand. The industry standard that covers this equipment is ANSI MH30.3, "Performance and Testing of Vehicle Restraining Devices," and it sits alongside MH30.1 for dock levelers and MH30.2 for portable dock plates. Three separate categories of equipment.
| What you can see | What it's usually called | How it works |
|---|---|---|
| A hook or arm at the dock face that rises and grabs the horizontal bar under the back of the trailer | Hook restraint, RIG restraint, dock lock | Engages the trailer's rear impact guard |
| A barrier or arm that comes up in front of a trailer wheel | Wheel-based restraint, wheel barrier | Blocks the wheel rather than the impact guard |
| A manual bar or chain arrangement, no motor | Manual restraint | Set by hand, no power |
| Red and green lights inside and outside the bay | Communication lights, traffic lights | Tell the driver and the dock crew whether it is safe to move |
| Wiring that stops the door or leveler working unless the restraint is engaged | Interlock | Links the restraint to the door or leveler |
Not all trailers can be restrained the same way. Rear impact guard condition, height and trailer type all affect whether a hook restraint can get a grip. If your restraint has stopped working on one carrier's trailers but not others, that is worth saying on the call — it is a real pattern and a provider will want to know.
Not sure which type you have? Say what comes up at the dock face.
What's it doing — and what a qualified provider checks
Keep people and powered equipment clear, do not force the restraint, and follow the facility's established process for taking the affected bay out of use. Nothing on this page explains how to override, bypass or manually release a restraint, and nothing here should be read as permission to do so.
| What you're seeing | What a qualified provider may inspect | Why it matters |
|---|---|---|
| Won't engage on any trailer | Restraint mechanism, drive, power, controls, sensors, dock face alignment | The bay has no restraint protection at all |
| Won't engage on some trailers | Restraint travel range, dock face height, trailer impact guard fit | Often a fit issue rather than a fault, but it still needs checking |
| Won't release, trailer still held | Restraint mechanism, drive, hydraulics or motor, controls, obstruction | The trailer cannot leave and the bay is blocked. Say this first on the call |
| Outside light stays green when it shouldn't | Controls, light circuit, restraint position sensing, interlock | The driver is being told it is safe to pull out. This is the most dangerous fault on the list |
| Inside light stays red | Controls, light circuit, restraint position sensing | The dock crew cannot tell what state the restraint is in |
| Lights don't match the restraint position | Sensing, wiring, controls, interlock logic | The whole point of the signal is that it is accurate |
| Door or leveler won't work with restraint engaged | Interlock wiring, controls, restraint sensing, door or leveler controls | An interlock doing its job, or an interlock failing. Both need a qualified look |
| Damaged after an impact | Restraint housing, mount, dock face, wiring, drive | Impact damage to the mount is structural as well as mechanical |
If a trailer is held on a failed restraint right now, say that in the first sentence of the call. That is not a detail to mention at the end. It changes the priority and it changes what the provider brings.
Say which bay and whether a trailer is on it.
Chocks, restraints, and what the federal rule actually says
This comes up on every dock, so here is the plain version.
The federal rule for powered industrial trucks, 29 CFR 1910.178(m)(7), says: "Brakes shall be set and wheel blocks shall be in place to prevent movement of trucks, trailers, or railroad cars while loading or unloading. Fixed jacks may be necessary to support a semitrailer during loading or unloading when the trailer is not coupled to a tractor. The flooring of trucks, trailers, and railroad cars shall be checked for breaks and weakness before they are driven onto." The companion paragraph, (k)(1), adds: "The brakes of highway trucks shall be set and wheel chocks placed under the rear wheels to prevent the trucks from rolling while they are boarded with powered industrial trucks."
Two things follow from that, and both are worth being clear about.
First: the rule talks about brakes and wheel blocks. It does not mandate a powered restraint. Plenty of facilities specify restraints anyway, for good reasons, but do not let anyone tell you a federal rule requires one.
Second, and more important: a failed restraint does not automatically make some improvised substitute acceptable. How your facility secures trailers when a restraint is out of service is a decision for whoever owns that procedure at your site — not something a repair company or a web page decides for you. Report the failure, take the bay out of use through your normal process, and let the people who own the procedure make that call.
What this page covers, and what it doesn't
Covered. Trailer and vehicle restraints at commercial loading docks — hook and wheel-based restraints, their drives, controls and position sensing, plus the communication lights and interlocks that go with them.
Not covered, and this list matters more here than on most pages.
- Semi-trailer roadside repair, truck repair and mobile trailer service. If a trailer has broken down, that is a truck shop, not us.
- Trailer cargo doors and rear impact guards. Damage to the trailer itself is the carrier's problem, not the building's.
- Locksmithing. "Dock lock" is a piece of dock equipment, not a padlock or a door lock.
- Installed dock levelers — dock leveler repair.
- Dock seals, shelters, bumpers, plates and boards — dock equipment repair.
- Any door.
- The concrete dock face and building structure.
- Parts-only orders.
- Boat docks and marine equipment.
What happens after you call
You describe the restraint and what it is doing, and whether a trailer is held. The request goes to an independent commercial dock-and-door repair company. That company confirms the address, the scope, whether it can take the work, when, what it costs, and its own contract, work and warranty terms.
- You call (385) 325-7138 and describe it. Facility address, bay number, what the restraint and the lights are doing, and whether a trailer is on it.
- The request goes to an independent repair company. Uptime does not repair equipment and does not price the work.
- That company confirms availability, scope, pricing and service terms directly with you.
An example of what that first sentence can sound like: "The restraint on bay 9 won't release at our warehouse in Boston, and there's a trailer on it right now." That is example wording, not a script and not a real job.
If you reach voicemail, leave the facility address, the door or dock number if known, what's wrong, and a callback number.
If a trailer is held right now, say that first.
Useful to have — but not required
You can call without any of this. The facility address, the bay number and "the restraint won't release" are enough.
If you already know them: whether it is a hook or a wheel-based restraint, whether the lights are working, whether the door or leveler is interlocked to it, roughly how old the equipment is, and whether it has been failing intermittently or stopped all at once.
Do not go and look. Nobody should reach into a restraint mechanism, go between the trailer and the dock face, or try to free a held trailer by hand.
What decides what this costs
We can't quote a restraint repair from a web page. The price depends on the unit, the fault, parts, and access. Here's what to ask before you authorize work.
| What changes the price | What to ask |
|---|---|
| Call-out or diagnostic fee | "Is there a call-out fee, and does it come off the repair?" |
| Restraint type and whether it's powered | "Is this the hook type or wheel-based, and does that change the parts?" |
| Mechanism versus controls versus lights | "Which part of the system is the fault in?" |
| Interlock wiring to a door or leveler | "Is the interlock in scope?" |
| Parts availability for the make | "Are the parts current for this unit?" |
| Mount and dock face condition | "Is the mounting sound, or is there structural work behind this?" |
| Access and whether the bay stays in production | "Does the bay need to be out of use, and for how long?" |
Ask which kind of number you are getting: a call-out fee, a starting price, a scoped fixed price, an estimate, or a final quote.
Ask the price questions on the phone.
Massachusetts rules worth knowing before you authorize work
Massachusetts does not license dock equipment work as a trade. A restraint is powered equipment with a control and signalling system, so the electrical side matters here more than on most dock equipment. Regulated electrical work sits with the Board of State Examiners of Electricians, and Massachusetts adopted the 2026 National Electrical Code effective April 24, 2026. Ask who performs the electrical scope and under what credential, and check it on the electrician lookup. The Construction Supervisor License is a separate credential on a separate system.
If the work touches the dock face structure, ask the building official which permit path applies. In Massachusetts that is your city or town, never the county. Boston's Inspectional Services Department publishes 617-635-5300 and isd@boston.gov. The provider and the issuing office confirm what applies to your job.
The full Massachusetts before-you-hire checks are on the Boston hub page.
Where we take these calls
Across the seven counties of the Boston metro in Massachusetts and New Hampshire. The full service area is here. The independent provider confirms whether it can serve the facility address and equipment, and sets scheduling, pricing, and service terms.
Common questions
The restraint won't release and there's a trailer on it — what do we do? Say exactly that in the first sentence when you call. Keep people clear of the bay and the trailer, do not try to free it by hand, and follow your facility's established process for taking that bay out of use. The people who own that procedure at your site decide how the trailer is handled; we get the request to a repair company.
Is a vehicle restraint required by OSHA? No. The federal rule for powered industrial trucks requires brakes set and wheel blocks in place to prevent movement while loading or unloading, and fixed jacks where a semitrailer is not coupled to a tractor. It does not mandate a powered restraint. Many facilities specify one anyway.
The outside light is green but the restraint isn't engaged — how urgent is that? Treat it as urgent. The signal exists so a driver knows when it is safe to pull away. A light that does not match the restraint's actual position is the fault most likely to cause a trailer to move at the wrong moment.
Do you repair semi-trailers or trailer doors? No. This page is dock equipment mounted to the building. Damage to a trailer, its cargo door or its rear impact guard is the carrier's repair, not the facility's.
Call about a trailer or vehicle restraint in Boston
Tell us the facility location, the bay number, and whether a trailer is held.
Independent service-request website. Calls may be shared with an independent commercial dock-and-door repair company. That provider confirms availability, scope, pricing, and service terms.
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Sources
- 29 CFR 1910.178, powered industrial trucks — checked September 21, 2026
- ANSI MH30.3-2022, performance and testing of vehicle restraining devices — checked September 21, 2026
- Board of State Examiners of Electricians — checked September 21, 2026
- 527 CMR 12.00, Massachusetts Electrical Code, effective April 24, 2026 — checked September 21, 2026
- Check a Construction Supervisor License, Commonwealth of Massachusetts — checked September 21, 2026
- City of Boston Inspectional Services Department — checked September 21, 2026