Trailer & Vehicle Restraint Repair in Dallas–Fort Worth, TX
For trailer restraint and vehicle restraint repair in Dallas–Fort Worth, TX, call (385) 325-7138 about a dock lock that won't engage, a restraint that won't release with a trailer at the dock, or communication lights and interlocks that have stopped working. Warehouses, distribution centers and plants across the metro.
If a trailer is being held right now, say that first.
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 18, 2026.
Which trailer restraint needs repair?
A vehicle restraint, also called a truck restraint or dock lock, is equipment designed to prevent trailer movement at the dock during loading or unloading. Restraints can be manual or powered and can act on the trailer's rear impact guard or a wheel. The type matters when you describe the problem.
| What you can see | Type | What it grips | What tends to fail |
|---|---|---|---|
| Hook that rises from below the bumpers and catches a bar under the trailer | Rotating-hook restraint | The trailer's rear underride bar | Hook won't rise, won't engage, won't release; sensor faults |
| Vertical barrier that rises at the trailer's rear impact guard | Barrier-style restraint | Engages the rear impact guard to resist departure | Won't raise or lower; impact damage |
| Device that clamps or blocks a wheel | Wheel-based restraint | The trailer's wheel | Won't extend, won't grip, alignment issues |
| Purpose-built restraint operated manually | Manual restraint | Rear impact guard or wheel, depending on model | Bent mechanism, missing parts or engagement trouble |
| Red/green light pairs inside and outside the bay | Communication lights | Nothing — they signal status | Lights disagree with the equipment, dead heads, wiring |
| Door or leveler that won't run while the restraint is in a certain state | Interlock | Ties equipment together on purpose | Interlock stuck, or genuinely doing its job |
Trailer rear impact guards differ, and compatibility can affect whether a restraint engages. Worth mentioning on the call if it only happens with some trailers; the provider still checks for damage, alignment and equipment faults.
A restraint just failed. What do you report?
| What you observe | What it means for the bay | What to report | What not to do |
|---|---|---|---|
| Restraint won't engage | The trailer isn't secured — loading shouldn't start | "Won't grab, bay 9" | Don't load "just this once" |
| Engages then releases on its own | Unexpected release can leave the trailer unsecured | "It lets go after a minute" | Don't rely on the light |
| Won't release with a trailer on it | Trailer and bay are both stuck | "Trailer is held and we can't release it" | Don't pull with a tractor |
| Lights disagree with the restraint | Nobody can trust the signal | "Inside indicates secured, but the restraint has not engaged" | Don't override the signal |
| Interlock won't let the leveler or door run | Could be a fault or the system working correctly | "Leveler is dead while the restraint is stuck" | Don't bypass the interlock |
| Damaged after an impact | Structural damage to a safety device | "A trailer hit it; it's bent" | Don't approach it |
| Operates but the trailer still moved | Movement despite an engaged indication | "It says engaged and the trailer crept" | Stop using the bay now |
| Control panel dead | No control, no status | "No lights, no response at the panel" | Don't open the panel |
The short version of all of it: do not approach a stuck restraint, do not try to free it, do not bypass an interlock, and do not send a forklift into that trailer. Take the bay out of use through your facility's existing process, keep people clear, and call.
You can call with that description; a model number is not a prerequisite.
Why a broken restraint is more than an operations problem
There's a federal chain behind this equipment, and it's worth understanding in plain words — because it changes what a broken restraint costs you.
OSHA's powered industrial truck rule calls for brakes set and wheel blocks in place to prevent trucks and trailers from moving during loading and unloading (29 CFR 1910.178(k)(1) and (m)(7)). The dockboard rule points the same way, referring to measures such as wheel chocks or sand shoes whenever a dockboard or leveler is in use (29 CFR 1910.26).
Restraints fit into that through an OSHA directive, STD 01-11-007 (August 5, 1981), which describes a de minimis enforcement policy for certain chocking violations when positive mechanical restraint is used — on three conditions:
- It is installed and used so that it effectively prevents movement during loading, unloading and boarding.
- All of the mechanical equipment is installed, maintained and used as the manufacturer recommends.
- Any damaged mechanical equipment is removed from service immediately.
Read condition two and three together. The policy depends on maintained equipment and immediate removal of damaged equipment from service. It is not blanket permission to omit chocks or bypass a failed restraint; your facility must determine the applicable requirements for its operation.
ANSI MH30.3 is the industry standard covering vehicle restraining devices, separate from the standards for installed levelers (MH30.1) and portable plates and boards (MH30.2).
None of this tells you what to do at your dock today. Your safety program and the equipment maker's instructions do that. What it does tell you is why a restraint repair deserves a call rather than a work order that sits.
What this page doesn't cover
- Wheel chocks as supplied equipment — dock equipment
- The dock leveler itself — dock leveler repair
- The dock door — metro homepage
- The trailer, the tractor or anything mounted on the vehicle
- Parts-only orders
- Any advice on bypassing, overriding or working around a safety device
- Residential garages, boat docks/lifts, pedestrian entrances or locks, and structural concrete, pit or slab work
What happens after you call
- You call and describe it — address, bay number, whether a trailer is held right now, what the lights show.
- Calls may be shared with an independent commercial dock-and-door repair company.
- The company that takes the work confirms scope, availability, price, schedule and its own terms with you directly.
Example of what to say: "The restraint at bay 9 in Dallas–Fort Worth won't release and there's a trailer on it — I can give you the address." Example wording, 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.
Hours, response time and availability are set by the independent repair company that takes the work.
What's useful to have ready
- Facility address and callback number
- Bay number
- Whether a trailer is currently held
- What the lights are showing, inside and outside
- Whether the door or leveler is interlocked with the restraint
- Brand, if it's visible from a safe distance
Don't walk up to it for any of this.
What drives the price
We can't quote your exact restraint repair from a web page. The price depends on the equipment, the fault, parts, and access. Here's what to ask before you authorize work.
| Driver | Why it moves the price | What to ask |
|---|---|---|
| Restraint type | The mechanism and model determine compatible parts | What type and model is it? |
| Hydraulic or electric drive | Different components, different labor | Is this a drive fault or a control fault? |
| Controls and light package | Panels and light heads are often replaced as assemblies | Are the lights and panel in this quote? |
| Interlock wiring | Ties into the leveler or door | Is the interlock being tested after the repair? |
| Impact damage | Bent structure is a bigger job than a worn part | Is any of this structural? |
| Access with a trailer present | The bay may need to be cleared first | Do you need the trailer moved, and can that be done safely? |
| Parts availability | Model support and stock affect lead time | Are parts still available for this model? |
Ask one extra question here: what confirms the unit is working before it goes back into service? A restraint that's been repaired should be demonstrated, not just declared fixed.
Repair or replace?
Restraints are repairable equipment. Hydraulic components, motors, sensors, control boards, light heads and wiring are all serviceable.
Replacement comes up when the unit has taken structural damage from an impact, when the model is obsolete and parts are scarce, or when the dock has changed — different trailers, different heights, more traffic — and the existing unit no longer engages reliably with what's backing in. If the same restraint keeps failing to grab certain trailers, ask about compatibility as well as a possible fault. A repair will not solve a mismatch between the restraint and the trailers using that bay.
Local rules that touch restraint work
Ask about permits for the actual restraint work, including mounting changes, a control panel, a new circuit or lights moved to a new position. Equipment repair and electrical or structural work can have different requirements.
In Texas, non-exempt electrical work must be performed by licensed people working through a licensed electrical contractor (TDLR), and TDLR runs a free public license search. There's a second question worth asking if your restraint or dock controls tie into a building alarm or electronic access-control system — that can put part of the work in a different regulatory box from plain equipment wiring. Ask the provider which parts of the job fall where.
Ask the responsible permit office before authorizing work that changes the structure, wiring or equipment; the office depends on the address: City of Dallas (214-948-4480), City of Fort Worth (817-392-2222), or the relevant county fire/development offices for an unincorporated address — Tarrant County 817-838-4660, Dallas County 214-653-7970.
Where this service is available
Trailer and vehicle restraint work across the 11-county Dallas–Fort Worth metro. Town pages for Arlington, Irving, Grand Prairie and Lancaster; the rest is on the service area page. The independent provider confirms the facility address and availability.
Questions before you call
Our restraint is stuck on a trailer. What do we do right now? Keep people clear of the bay and out of the trailer. Don't try to free the hook and don't pull the trailer with a tractor. Take the bay out of use through your normal process, and call with the bay number and the fact that a trailer is held.
Do we still need chocks if we have dock locks? OSHA's STD 01-11-007 describes a de minimis enforcement policy under specific conditions, not a blanket exemption for every dock lock. Your facility must determine the applicable vehicle-movement rules; damaged restraint equipment must be removed from service under the directive's conditions.
Can the communication lights be fixed without replacing the restraint? Often, yes — lights, heads, switches and wiring are separate components. But when the lights disagree with what the restraint is actually doing, the fault may be in the restraint or the controls rather than the lamp. That gets checked, not assumed.
Who decides the bay is safe to use again? Your facility and the repair company, together. This site doesn't inspect equipment and can't clear a bay.
Get the bay secured again
Dock lock won't grab, won't release, or a trailer is held — call and describe it.
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.
Background on how this equipment works nationally: loading dock repair. How requests are handled: how it works and about Uptime.
Dallas–Fort Worth home · Local dock and door services · Counties and communities · Phone and call information
Sources
Checked September 18, 2026.
- TDLR: Electricians program
- TDLR: 2026 NEC adoption notice
- Dallas: building-inspection and permit FAQ
- Dallas: adopted construction and fire codes
- Fort Worth: commercial permits
- Fort Worth: building and energy codes
- Tarrant County: fire-code information
- Dallas County: construction permit process
- OSHA 29 CFR 1910.178: powered industrial trucks
- OSHA 29 CFR 1910.26: dockboards
- OSHA STD 01-11-007: mechanical trailer restraint
- MHI: loading-dock equipment
- Rite-Hite: communication at the dock