Recall 21V548 affects 1,284 2020 Altec An-Class and Aa-Class vehicles for a faulty leveling sprocket weld. Repair is free at any franchised Altec dealer.
Altec is recalling 1,284 2020 An-Class and Aa-Class vehicles because a weld between the leveling sprocket and hub assembly can fail. If that weld fails, platform leveling can become uncontrolled, increasing the risk of injury and death; Altec dealers will complete the recall repair free of charge.
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What's wrong?
On 2020 Altec An-Class and Aa-Class vehicles, the leveling sprocket is part of the boom, crane, or ladder equipment. The sprocket works with the hub assembly to help the aerial device stay level as it moves. That leveling function depends on the sprocket and hub staying firmly joined.
On affected vehicles, the weld joining the sprocket to the hub assembly was not made correctly. Altec identified a cold weld with poor penetration, which means the weld did not bond deeply enough into the metal parts. That weak joint can separate under use, leaving the leveling sprocket failed instead of locked to the hub.
An owner or operator can spot this problem during the pre-operational inspection. A functional test of the aerial device can identify a failed sprocket before the equipment is placed into service.
Who's affected?
Both model classes use the same leveling sprocket in the boom/crane/ladder equipment.
| 2020 Altec An-Class | Boom/crane/ladder |
|---|---|
| 2020 Altec Aa-Class | Boom/crane/ladder |
| Units affected | 1,284 |
| Field incidents | NHTSA has logged 1 field incident to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific vehicle is included.
What's the safety risk?
Uncontrolled platform leveling raises the risk of injury or death around the aerial device. Before use, complete the aerial device functional test during the pre operation inspection; that check is where a failed sprocket is identified. Keep operators clear if leveling is abnormal and schedule the repair soon. Repair is free at any franchised Altec dealer.
What should I do?
- Check your VIN to confirm your 2020 Altec An-Class or Aa-Class is included in this recall.
- Contact Altec customer service at 1-877-462-5832 to schedule the free inspection and repair.
- Schedule the leveling-sprocket inspection and repair that fixes the failed sprocket-to-hub weld and limits uncontrolled platform leveling.
- Bring the owner letter if you have it, and reference recall number 21V548 when you call.
- Avoid using the aerial platform until Altec completes the inspection and any required repair.
What happens at the repair
At the dealer, an Altec technician inspects the leveling sprocket and hub assembly. If the sprocket assembly is damaged, the technician replaces it. If no damage is found, the technician installs a secondary retention kit to limit platform rotation. The inspection, parts, and labor are free under recall 21V548. Altec has a general reimbursement plan on file for eligible out of pocket repairs paid before the recall notice. Bring prior repair paperwork to Altec customer service so they can review it under that plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| July 21, 2021 | NHTSA published the recall |
|---|---|
| September 15, 2021 | Owner notification mailed |
| September 16, 2021 | Interim owner notification (was planned for this date) |
| September 17, 2021 | Dealer notification ended |
Frequently asked questions
What is recall 21V548?
Recall 21V548 covers 1,284 2020 Altec An-Class and Aa-Class vehicles with a leveling sprocket weld that failed between the sprocket and hub assembly. Uncontrolled platform leveling increases the risk of injury and death. Altec will inspect and complete the needed repair for free.
What should I do if my 2020 Altec An-Class or Aa-Class is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V548. If it is, contact a franchised Altec service location to schedule the inspection. Reference recall 21V548 or Altec CSN 828 when you call. The repair is free.
Is the recall repair free?
Yes. Altec will inspect the leveling sprocket assembly for free. If damage is found, Altec will replace the damaged sprocket assembly at no cost. If no damage is found, Altec will install a secondary retention kit to limit platform rotation for free.
What is the safety risk in recall 21V548?
The safety risk is uncontrolled platform leveling. The failed weld between the leveling sprocket and hub assembly can allow platform movement that increases the risk of injury and death. Keep the vehicle out of service for platform work until Altec completes the inspection and repair.
When were owners notified about recall 21V548?
Altec mailed owner notification letters on September 15, 2021. If you bought the vehicle used or never received a letter, check your VIN and call Altec customer service at 1-877-462-5832 with recall 21V548 or CSN 828.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V548000 |
|---|---|
| Altec customer service | 1-877-462-5832 |
| NHTSA recall # | 21V548 |
| NHTSA recall # (full) | 21V548000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →