Trailer Restraint & Dock Lock Repair in Mobile, AL

For trailer restraint and dock lock repair in Mobile, AL, call (385) 325-7138 if a restraint won't engage or won't release, or if the inside and outside lights don't match what's happening. Tell us the facility location and the dock number.

Call(385) 325-7138

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 23, 2026 — OSHA, ANSI and Mobile-area sources.

For commercial loading docks at warehouses, distribution centers, plants and similar sites.

What kind of trailer restraint do you have?

A trailer restraint, also called a vehicle restraint, truck restraint or dock lock, is a device at the dock that holds a trailer against the building while it's loaded. It keeps the trailer from creeping or pulling away. Most restraints are one of a few types, and many are wired to lights and to the leveler or door.

Type or part	How to recognize it	What to mention	Important distinction
Rotating-hook restraint	A steel hook on the dock wall that rises and catches the bar under the back of the trailer	"Hook restraint"	Needs a usable rear bar on the trailer
Wheel-based restraint	A device that blocks a trailer tire	"Wheel restraint"	Works on the tire, not the rear bar
Manual restraint	Set by hand with a handle or bar	"Manual"	No motor
Powered restraint	Engaged with a button at a control panel	"Powered"	Electric or hydraulic, with controls
Communication lights	Red and green lights inside and outside the dock door	The colors you see on each side	Tell the driver and dock crew when it's safe
Interlock	Links the restraint to the leveler or door so they operate in order	"The leveler won't work until the restraint engages"	Part of a safety system. Never bypass it.
Wheel chocks (standalone)	A wedge placed by hand at the tire	"Chocks"	See dock equipment

Nameplates you might see on restraints include Rite-Hite and Blue Giant, both of which make vehicle restraints. These are just examples of manufacturers. Listing them doesn't mean any affiliation, and you don't need a brand to call.

The industry standard for these devices is ANSI MH30.3-2022, "Performance and Testing of Vehicle Restraining Devices" (ANSI webstore listing; MHI LODEM).

What restraint problems can you call about?

You can call about a restraint that won't rise or engage, won't release, shows the wrong lights, keeps sounding an alarm, was hit by a trailer, or blocks the leveler or door through its interlock. You can also call about a dead control panel. The table below helps you describe the problem. The company that takes the job diagnoses it on site.

What you observe	What a qualified provider may inspect	Why it matters	How to report it
Hook won't rise or catch the trailer	Hook, drive, sensors	The trailer isn't held	"Restraint at dock __ won't engage."
Won't release the trailer	Hook, drive, controls	The truck can't leave, and forcing it can cause damage	"It won't let go of the trailer."
Lights stuck red or green, or wrong	Light units, sensors, controls	The driver and crew may get the wrong signal	"Lights stuck red with no trailer there."
Inside and outside lights don't match	Controls, wiring, sensors	Mixed signals at the dock	"Green inside, red outside."
Alarm keeps sounding	Sensors, controls	The system thinks something is wrong	"The alarm won't stop."
Restraint bent or loose after a trailer hit it	Mounting, carriage, hook	It may not hold a trailer	"A trailer bent the restraint."
Leveler or door won't work because of the restraint	Interlock, sensors	The system may be doing its job, or have a fault	"Leveler won't run. Restraint shows not engaged."
Control panel dead	Power, controls	No way to engage	"Panel is dark."
Can't catch some trailers	Hook reach, the trailer's rear bar	Some trailers can't be caught by a hook restraint	"It can't reach some trailers' bars."

What should you do if the restraint isn't working?

Treat that dock as out of use until the restraint is repaired, and follow your facility's own process. Never bypass or override the restraint, the lights or the interlocks to keep loading. Call (385) 325-7138 and say "dock down."

Federal OSHA's powered-industrial-truck rule names brakes and wheel chocks for highway trucks being boarded by forklifts (29 CFR 1910.178(k)(1)). Its enforcement directive conditionally accepts an effective positive mechanical restraint instead when installed, maintained and used as the manufacturer specifies, with damaged devices removed from service. The dockboard rule separately calls for measures to prevent vehicle movement (29 CFR 1910.26(d)). Your facility must confirm its installed system and safety procedure; do not bypass a failed restraint. See our research on vehicle restraints vs. wheel chocks.

If the dock is down, say so first.

Call(385) 325-7138

What does a restraint repair request cover, and what doesn't it?

This page covers repair of trailer restraints at commercial docks in Mobile County. That includes hooks, carriages, drives, sensors, communication lights, control panels, and the interlocks between the restraint, the leveler and the door. The company that takes the job confirms the exact scope.

Not covered: trailer repairs (including the trailer's rear bar and landing gear), boat docks, home garages, parts-only orders, and dock concrete.

The leveler and door have their own pages, even when they're interlocked with the restraint.

What should you say when you call?

Say where the facility is, which dock it is, what the restraint is doing, and what colors the lights show. You don't need the brand.

Call (385) 325-7138 and describe the problem. Say "dock down" first if it is.
Your request may be shared. If an independent commercial dock-and-door repair company receives it, that company decides whether it can take the job.
That company confirms the details. Availability, scope, price, scheduling and its own terms are set with them.

Example of what to say: "The trailer restraint at dock 6 in our Mobile, AL warehouse won't release and the lights are stuck red, and I can give you the address."

If you reach voicemail, leave the facility address, the door or dock number if known, what's wrong, and a callback number.

Read more about how service requests work and who Uptime is.

Call to describe the restraint problem.

Call(385) 325-7138

What details help, if you have them?

Optional. Don't hold the call for any of these.

Hook or wheel type, if known
Manual or powered
The brand, if you can see it without going near the restraint
The light colors inside and outside
Whether it's tied to the leveler or door
What happened: a trailer pulled away, an impact, or it just stopped

What affects trailer restraint repair cost?

We can't quote your restraint repair from a web page. The price depends on the restraint type, the fault, parts, and access. Here's what to ask before you authorize work.

Restraint repairs are priced by the company doing the work after it inspects the system. The main cost drivers are the restraint type, whether the fault is mechanical, electrical or in the controls, impact damage, and whether parts are available for that make.

Cost driver	Why it matters	What to ask
Trip or diagnostic charge	Many companies charge to come out	"Is there a trip charge? Does it apply to the repair?"
Hook vs. wheel type	Different mechanisms and parts	"What part failed?"
Drive: electric or hydraulic	Motor, pump and cylinder repairs differ	"Is it the drive or the controls?"
Sensors and lights	Often a smaller repair	"Is this a sensor or light fault?"
Interlock wiring	May involve licensed electrical work	"Who handles the wiring?"
Impact damage	Bent carriages and mounts add cost	"Is the mounting damaged?"
Parts availability	Some parts are made only by the original manufacturer	"Are parts in stock for this make?"
Repair vs. replace	Age and repeat failures	"Would a new restraint make more sense? Why?"

Ask these questions on the call.

Call(385) 325-7138

Should you repair or replace the restraint?

Whether to repair or replace depends on the restraint's age, whether parts are available, the extent of impact damage, and whether it can catch the trailers that now use your dock. A burned-out light or bad sensor is usually a repair. A bent carriage on an old unit with repeat faults may point to replacement. Ask the company to explain its reasoning, and to confirm a new restraint will work with your leveler and lights.

Which Mobile, AL rules matter for restraint work?

Most restraint repairs are handled by the company doing the work. Replacing a restraint or changing its wiring can raise electrical and permit questions. The company and the permit office decide what applies. We checked these sources on September 23, 2026.

Check	What the source says	Question to ask
Electrical	Alabama licenses "electrical power or control systems" work and exempts "systems that operate on 25 volts or less" (§34-36-3; §34-36-13; Alabama Board of Electrical Contractors)	"Who handles the power and control wiring? What license do they hold?"
New from October 1, 2026	The state board says exemptions for "certain routine or regular maintenance, repair, cleaning, and facility support services" take effect October 1, 2026, and "the law does not define every situation that may qualify" (board notice)	"Is this being treated as exempt maintenance?"
State license	A general contractor license applies when "the cost of the undertaking is one hundred thousand dollars ($100,000) or more" (Ala. Code §34-8-1)	Relevant to larger dock projects
Permit office	City of Mobile: Build Mobile, 251-208-7602. Unincorporated county: Inspection Services, 251-574-3507. Saraland and Semmes run their own.	"Does new wiring or a new restraint need a permit here?"
Workplace safety	Alabama is not an OSHA State Plan, so federal OSHA covers most private-sector workplaces (OSHA)	—

Where in the Mobile area?

Call about trailer restraints at facilities across Mobile County, including Mobile, Prichard, Saraland, Theodore and Tillmans Corner. Baldwin County and Pascagoula-area sites are reviewed case by case. See the Mobile, AL service area or go back to loading dock and dock door repair in Mobile, AL.

Trailer restraint questions

Is a dock lock the same as a trailer restraint?

Yes. People use "dock lock," "vehicle restraint," "truck restraint" and "trailer restraint" for the same kind of device.

Can the dock be used while the lights are wrong?

Treat it as out of use and follow your facility's process. Wrong lights mean the driver and crew may get the wrong signal. Don't override them.

Is an interlock fault a restraint problem or a leveler problem?

It can be either. Report what each piece is doing. The company that takes the job traces the fault.

Are wheel chocks enough without a restraint?

OSHA's rule names brakes and wheel chocks when a highway truck is boarded by a forklift. Its enforcement directive conditionally accepts an effective positive mechanical restraint instead. Follow the facility's procedure and have a qualified person assess any failed equipment before that bay is used.

Sources

Checked September 23, 2026:

For a national overview of dock equipment, see loading dock repair.

Call about the restraint

Tell us the address, the dock number and what the lights show.

Call(385) 325-7138

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.