Recall 16V522 affects 2 2016 Manac Flatbed trailers for delayed spring-brake application. Manac provides a free SR-5 valve repair kit.
Manac is recalling 2 2016 Flatbed trailers because certain Bendix SR5 spring brake valves can delay spring brake application while parking. A delayed brake application can let the trailer roll away after it is decoupled from the tractor, which raises the risk of a crash or injury; the Manac dealer repair will be free once available.
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What's wrong?
The parking brake system on a 2016 Manac Flatbed trailer uses air pressure and spring brakes to hold the trailer when it is parked. The Bendix SR-5 spring brake valve controls how that air pressure is released so the spring brakes apply when the driver sets the parking brake or disconnects the trailer.
On affected trailers, the SR-5 valve was improperly machined after a check valve seat radius was left out of a Bendix supplier drawing. That machining error interferes with how the valve handles air. When the parking control is used, the spring brakes can take longer to apply, so the trailer can be slow to settle into its parked, held position.
The slow-to-park condition can happen without warning. Before the tractor is decoupled, an affected trailer can have an audible air leak from the dash-mounted park control valve or from the red glad hand when it is disconnected.
Who's affected?
| 2016 Manac Flatbed | Parking brake |
|---|---|
| Units affected | 2 |
| Field incidents | NHTSA has logged no field incidents to date. |
Not every 2016 Manac Flatbed trailer is on the list. Check your VIN to confirm whether your specific trailer is included.
What's the safety risk?
A delayed spring brake application can let the trailer roll away after it decouples from the tractor, increasing the risk of a crash or injury. The rollaway event has no warning, but an affected trailer has an audible air leak at the park control valve or red glad hand before decoupling. Repair will be free at any franchised Manac dealer once available.
What should I do?
- Check your VIN to confirm your 2016 Manac Flatbed is included in this recall.
- Watch for Manac's owner notice before repairing the SR-5 spring-brake valve, because this recall does not list the remedy as available.
- Call Manac customer service at 1-573-262-2166 with questions and reference recall number 16V522 when you call.
- Chock the trailer and confirm the parking brake is fully applied before decoupling it from the tractor.
- Follow Manac's remedy-kit instructions once the free SR-5 spring-brake-valve repair is available; the kit addresses delayed parking-brake application.
What happens at the repair
Manac's remedy for campaign 16V522 is a repair kit for affected Bendix SR-5 trailer relay valves, with instructions for the valve repair. Because the remedy status is listed as under development, the final repair path should be treated as not open until Manac provides the kit or repair instructions for your trailer. The kit and related repair are free once available. Manac has a general reimbursement plan on file. If you already paid for an SR-5 trailer relay valve repair tied to this recall, contact Manac customer service with your repair paperwork and payment documentation.
| Reimbursement | Reimbursement available |
|---|
Timeline
| July 11, 2016 | NHTSA published the recall |
|---|---|
| September 2, 2016 | Owner notification mailed |
Frequently asked questions
What is recall 16V522?
Recall 16V522 covers 2 2016 Manac Flatbed trailers, model 10850B069, built from October 1, 2014, to October 31, 2014. The Bendix SR-5 spring brake valve was improperly machined, which can delay spring brake application while parking.
What should I do if my 2016 Manac Flatbed is on this recall?
Check your VIN to confirm your specific trailer is included in recall 16V522. If it is, contact Manac customer service at 1-573-262-2166 and ask for the free remedy kit and repair instructions for the affected SR-5 trailer relay valve.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to provide the recall remedy at no cost. Manac said it would provide a remedy kit with instructions to repair any affected SR-5 trailer relay valves free of charge.
What is the safety risk?
A delayed spring brake application can let the trailer roll away after it has been decoupled from the tractor, increasing the risk of a crash or injury. Until the repair is completed, confirm the trailer is secured before uncoupling it.
What if I bought this Manac Flatbed used?
The free recall remedy still applies. Ownership history does not decide recall eligibility. Check your VIN to confirm whether your specific trailer is included, then reference recall 16V522 when you contact Manac customer service at 1-573-262-2166.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/16V522000 |
|---|---|
| Manac customer service | 1-573-262-2166 |
| NHTSA recall # | 16V522 |
| NHTSA recall # (full) | 16V522000 |
Source documents
-
Download Owner Notification Letter (PDF) - Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 31, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →