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October 20, 2021 NHTSA CAMPAIGN NUMBER: 21V826000
Improperly tightened lug nuts can cause a loss of trailer stability, or the tire could fall off, increasing the risk of a crash.
NHTSA Campaign Number: 21V826
Manufacturer Doosan Portable Power
Components WHEELS
Potential Number of Units Affected 734
Summary
Doosan Portable Power (Doosan) is recalling certain 2019-2021 Doosan Portable Power Air Compressors and Mobile Generators. The wheel lug nuts may be improperly tightened.
Remedy
Owners are advised to not tow their trailer until the remedy has been performed. Dealers will tighten the lug nuts, free of charge. Owner notification letters were mailed November 4, 2021. Owners may contact Doosan customer service at 1-800-633-5206, Option #3.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
SAFETY RECALL
November 4, 2021
Technical Service Bulletin:
Wheel Lug Nut Torque Inspection
TSB Number: 12-21-6
Revision: This TSB replaces TSB dated October 11, 2021 with revised models affected and serial number tables. The units not affected by this SAFETY RECALL have been removed.
Class (AA-Safety Mandatory, A-Mandatory, B-Non-Mandatory, Product Improvement, Information Only):
AA-Safety Mandatory
Models Affected: Various Portable Air Compressors and Mobile Generators
Serial Number Break: See attached charts for affected models and serial numbers
Audience: Dealer Service Group and National Rental Accounts
Issue:
The wheel lug nut torque on the portable air compressor and mobile generator equipment identified in this letter may not meet engineering specifications. If out of specification, the equipment may experience vibration, tire wobble, or the wheel(s) could come off during towing.
Solution:
Immediately stop towing the affected equipment until the corrections instructed in this bulletin have been completed. Inspect and correct all affected equipment based on the applicable scenario below:
Scenario 1: Unit Has Not Been Towed
Properly torque the wheel lug nuts to the correct specification using the star pattern method (see Figure 1). Refer to the attached charts for correct wheel lug nut torque specification per unit model.
Scenario 2: Unit Has Been Towed
Remove the wheels and inspect wheel studs and holes in the wheels for damage.
- If no damage is observed, reinstall the wheels and torque the lug nuts to the correct specification using the star pattern method (see Figure 1). Refer to the attached charts for correct wheel lug nut torque specification per unit model.
- If damage is present, further inspect the area around the wheel for additional damage (for example, the wheel hub, leaf springs, etc.) and take clear photographs of all damaged components. Fill out the attached call sheet and call 1-800-633-5206 Option #3 to consult with a Doosan Factory Technician for guidance on parts to be replaced.
Instruct owner to re-check wheel lug nut torque again after 20 miles of towing.
Reminder: The Operation and Maintenance manual advises to CHECK Wheel Lug Nut torque on a Monthly basis.
Warranty: Campaign #12-21-6 is active in the warranty system for each potentially affected machine.
Scenario 1 repair: 1 hour (single axle), 1.25 hour (dual axle), or 1.5 hour (tri axle) labor plus travel time/mileage will be accepted per claim.
Scenario 2 repair: Labor time of repair, plus parts (if required), plus travel time/mileage will be accepted per claim. Attach photos of damaged/replaced parts to the warranty claim. All damaged/replaced parts shall be disposed of to prevent reuse.
All claims must be submitted as claim type = “Field Modification”.
Unit Model/Serial Number/Wheel Lug Nut Torque Charts:
MOBILE GENERATORS
Model | Total Units | Beginning Serial # | Ending Serial # | Wheel Lug Nut Torque |
G25WDO-3A-T4F | 165 | 501715UCAFH45 | 503276UGAFH45 | 100‐120 Ft.‐Lbs. |
G40WDO-3A-T4F | 12 | 501771UDAFH46 | 503028UFAFH46 | 100‐120 Ft.‐Lbs. |
G50WDO-3A-T4F | 16 | 501772UDAFH35 | 503044UFAFH35 | 100‐120 Ft.‐Lbs. |
G70WDO-3A-T4F | 4 | 502863UFAFH41 | 503030UFAFH41 | 100‐120 Ft.‐Lbs. |
G70WDO-3Q-T4F 600V | 6 | 501769UDAFH66 | 502432UEAFH66 | 100‐120 Ft.‐Lbs. |
G125WCU-3Q-T4F 600V | 4 | 501923UDAFH67 | 502124UDAFH67 | 100‐120 Ft.‐Lbs. |
G240WCU-3Q-T4F 600V | 2 | 501920UDAFH11 | 501921UDAFH11 | 100‐120 Ft.‐Lbs. |
G325WCU-3Q-T4F 600V | 3 | 501922UDAFH13 | 501957UDAFH13 | 100‐120 Ft.‐Lbs. |
G400WCU-3B-T4F | 91 | 490767UAADH14 | 503135UGAFH14 | 140‐170 Ft.‐Lbs. |
G400WCU-3Q-T4F-600V | 21 | 494213UEADH36 | 503318UHAFH36 | 140‐170 Ft.‐Lbs. |
G570WCU-2B-T4F | 31 | 501918UCAFH80 | 503122UGAFH80 | 100‐120 Ft.‐Lbs. |
MOBILE GENERATORS (Reman)
Model | Affected Serial #’s | Wheel Lug Nut Torque |
G570WCU-2B-FX-T2 | 425744RBAFH76, 437711RBAFH76, 455329RCAFH76 | 100‐120 Ft.‐Lbs. |
Unit Model/Serial Number/Wheel Lug Nut Torque Charts:
PORTABLE AIR COMPRESSORS
Model | Total Units | Beginning Serial # | Ending Serial # | Wheel Lug Nut Torque |
HP375WCU-T2-EX | 1 | 502433UEAFG03 | N/A | 100‐120 Ft.‐Lbs. |
P425/HP375WCU-T4F | 140 | 501733UDAFH17 | 503003UFAFH17 | 100‐120 Ft.‐Lbs. |
HP450/VHP400WCU-T4F | 30 | 501714UCAFH18 | 502833UFAFH18 | 100‐120 Ft.‐Lbs. |
XP825/HP750WCU-T4F | 27 | 501831UCAFF72 | 503134UGAFF72 | 100‐120 Ft.‐Lbs. |
PORTABLE AIR COMPRESSORS (Reman)
Model | Affected Serial #’s | Wheel Lug Nut Torque |
HP375WCU | 389396REAFB11 | 100‐120 Ft.‐Lbs. |
XP375WIR-T3 | 354296RCAFC48, 363138REAFC48, 412230RFAFC48 | 100‐120 Ft.‐Lbs. |
HP750WCU-T1 | 312205RDAFH42, 325930RDAFH42 | 100‐120 Ft.‐Lbs. |
HP750WCU-T3 | 346794RFAFH37, 353590RDAFH37, 354085RFAFH37, 354087RFAFH37, 364987RDAFH37, 392125RFAFH37, 412321RBAFH37, 425922RBAFH37 | 100‐120 Ft.‐Lbs. |
XP825WCU-T1 | 263729RDAFH43, 283897RGAFH43, 290573RDAFH43, 306991REAFH43, 333214RDAFH43 | 100‐120 Ft.‐Lbs. |
XP825WCU-T3 | 339744RDAFH40, 364986RCAFH40, 415888RBAFH40 | 100‐120 Ft.‐Lbs. |
HP915WCU-T3 | 413412REAFH53, 441557REAFH53 | 100‐120 Ft.‐Lbs. |
Chronology :
Doosan Portable Power received a report on 7/29/21 of loose wheel lug nuts on four mobile generators. Based on the report, the company initiated an internal investigation. The company determined potential noncompliance with manufacturing requirements, and as of August 15, 2021 the wheel lug not torque on all production units are being tested and validated to ensure Engineering specifications have been achieved. During the investigation, the company received additional reports received on 8/17/21, 9/29/21, 10/4/21, and 10/5/21 of wheels coming off various portable air compressors and mobile generators while being towed.
On 10/04/21, the company contacted NHTSA to initiate reporting the issue. On 10/14/21, the company started notifying national account customers that owned the majority of potentially affected units, provided serial numbers, instructed them to stop towing immediately, and instruction on how to properly check and correct the issue as needed.
6 Affected Products
Vehicles
MAKE | MODEL | YEAR |
DOOSAN PORTABLE POWER | AIR COMPRESSOR | 2019-2021 |
DOOSAN PORTABLE POWER | MOBILE GENERATOR | 2019-2021 |
16 Associated Documents
Remedy Instructions and TSB
RCRIT-21V826-1425.pdf 729.866KB
Recall Acknowledgement
RCAK-21V826-1667.pdf 1016.807KB
Defect Notice 573 Report
RCLRPT-21V826-3556.PDF 212.45KB
Remedy Instructions and TSB
RCRIT-21V826-2874.pdf 732.243KB
Recall 573 Report – Amendment 3
RCLRPT-21V826-8087.PDF 214.359KB
Recall Quarterly Report #1, 2021-4
RCLQRT-21V826-3575.PDF 211.123KB
Recall 573 Report – Amendment 2
RCLRPT-21V826-4331.PDF 213.586KB
Recall Quarterly Report #2, 2022-1
RCLQRT-21V826-4310.PDF 211.222KB
Recall Quarterly Report #2, 2022-1
RCLQRT-21V826-6336.PDF 211.384KB
Recall Quarterly Report #1, 2021-4
RCLQRT-21V826-4027.PDF 211.39KB
Recall Quarterly Report #3, 2022-2
RCLQRT-21V826-7061.PDF 211.39KB
Recall Quarterly Report #4, 2022-3
RCLQRT-21V826-4645.PDF 211.39KB
Recall Quarterly Report #2, 2022-1
RCLQRT-21V826-1609.PDF 211.381KB
Recall Quarterly Report #1, 2021-4
RCLQRT-21V826-3286.PDF 211.387KB
Recall Quarterly Report #3, 2022-2
RCLQRT-21V826-8839.PDF 211.387KB
Recall Quarterly Report #4, 2022-3
RCLQRT-21V826-8530.PDF 211.387KB
Latest Recalls Documents
For the Latest and Most Recent Recalls Information Visit the link below…
https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=21V826&docType=RCL
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- ATTENTION: Refer to the owner’s manual or the wheel manufacturer’s guide for the correct thread size, seat style, length, hex and torque specifications. You assume all liability of improper installation which can result in accident and/or injury.
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Last update on 2024-04-12 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.
SEOCONTENT-START
704 883 3500 www.doosanportablepower.com DOOSAN and the Doosan logo are trademarks of Doosan Corporation. Doosan Portable Power 1293 Glenway Drive Statesville, NC 28625 SAFETY RECALL November 4, 2021 Technical Service Bulletin: Wheel Lug Nut Torque Inspection TSB Number: 12-21-6 Revision: This TSB replaces TSB dated October 11, 2021 with revised models affected and serial number tables. The units not affected by this SAFETY RECALL have been removed. Class (AA-Safety Mandatory, A-Mandatory, B-Non-Mandatory, Product Improvement, Information Only): AA-Safety Mandatory Models Affected: Various Portable Air Compressors and Mobile Generators Serial Number Break: See attached charts for affected models and serial numbers Audience: Dealer Service Group and National Rental Accounts Issue: The wheel lug nut torque on the portable air compressor and mobile generator equipment identified in this letter may not meet engineering specifications. If out of specification, the equipment may experience vibration, tire wobble, or the wheel(s) could come off during towing. Solution: Immediately stop towing the affected equipment until the corrections instructed in this bulletin have been completed. Inspect and correct all affected equipment based on the applicable scenario below: Scenario 1: Unit Has Not Been Towed Properly torque the wheel lug nuts to the correct specification using the star pattern method (see Figure 1). Refer to the attached charts for correct wheel lug nut torque specification per unit model. Scenario 2: Unit Has Been Towed Remove the wheels and inspect wheel studs and holes in the wheels for damage. 704 883 3500 www.doosanportablepower.com DOOSAN and the Doosan logo are trademarks of Doosan Corporation. Doosan Portable Power 1293 Glenway Drive Statesville, NC 28625 • If no damage is observed, reinstall the wheels and torque the lug nuts to the correct specification using the star pattern method (see Figure 1). Refer to the attached charts for correct wheel lug nut torque specification per unit model. • If damage is present, further inspect the area around the wheel for additional damage (for example, the wheel hub, leaf springs, etc.) and take clear photographs of all damaged components. Fill out the attached call sheet and call 1-800-633-5206 Option #3 to consult with a Doosan Factory Technician for guidance on parts to be replaced. Instruct owner to re-check wheel lug nut torque again after 20 miles of towing. Reminder: The Operation and Maintenance manual advises to CHECK Wheel Lug Nut torque on a Monthly basis. 5 hole pattern 6 hole pattern 8 hole pattern Figure 1 – Star pattern method – torque sequence Warranty: Campaign #12-21-6 is active in the warranty system for each potentially affected machine. Scenario 1 repair: 1 hour (single axle), 1.25 hour (dual axle), or 1.5 hour (tri axle) labor plus travel time/mileage will be accepted per claim. Scenario 2 repair: Labor time of repair, plus parts (if required), plus travel time/mileage will be accepted per claim. Attach photos of damaged/replaced parts to the warranty claim. All damaged/replaced parts shall be disposed of to prevent reuse. All claims must be submitted as claim type = “Field Modification”. 1 6 3 2 4 5 3 1 2 4 5 5 4 1 3 2 8 6 7 704 883 3500 www.doosanportablepower.com DOOSAN and the Doosan logo are trademarks of Doosan Corporation. Doosan Portable Power 1293 Glenway Drive Statesville, NC 28625 Unit Model/Serial Number/Wheel Lug Nut Torque Charts: MOBILE GENERATORS Model Total Units Beginning Serial # Ending Serial # Wheel Lug Nut Torque G25WDO-3A-T4F 165 501715UCAFH45 503276UGAFH45 100‐120 Ft.‐Lbs. G40WDO-3A-T4F 12 501771UDAFH46 503028UFAFH46 100‐120 Ft.‐Lbs. G50WDO-3A-T4F 16 501772UDAFH35 503044UFAFH35 100‐120 Ft.‐Lbs. G70WDO-3A-T4F 4 502863UFAFH41 503030UFAFH41 100‐120 Ft.‐Lbs. G70WDO-3Q-T4F 600V 6 501769UDAFH66 502432UEAFH66 100‐120 Ft.‐Lbs. G125WCU-3Q-T4F 600V 4 501923UDAFH67 502124UDAFH67 100‐120 Ft.‐Lbs. G240WCU-3Q-T4F 600V 2 501920UDAFH11 501921UDAFH11 100‐120 Ft.‐Lbs. G325WCU-3Q-T4F 600V 3 501922UDAFH13 501957UDAFH13 100‐120 Ft.‐Lbs. G400WCU-3B-T4F 91 490767UAADH14 503135UGAFH14 140‐170 Ft.‐Lbs. G400WCU-3Q-T4F-600V 21 494213UEADH36 503318UHAFH36 140‐170 Ft.‐Lbs. G570WCU-2B-T4F 31 501918UCAFH80 503122UGAFH80 100‐120 Ft.‐Lbs. MOBILE GENERATORS (Reman) Model Affected Serial #’s Wheel Lug Nut Torque G570WCU-2B-FX-T2 425744RBAFH76, 437711RBAFH76, 455329RCAFH76 100‐120 Ft.‐Lbs. 704 883 3500 www.doosanportablepower.com DOOSAN and the Doosan logo are trademarks of Doosan Corporation. Doosan Portable Power 1293 Glenway Drive Statesville, NC 28625 Unit Model/Serial Number/Wheel Lug Nut Torque Charts: PORTABLE AIR COMPRESSORS Model Total Units Beginning Serial # Ending Serial # Wheel Lug Nut Torque HP375WCU-T2-EX 1 502433UEAFG03 N/A 100‐120 Ft.‐Lbs. P425/HP375WCU-T4F 140 501733UDAFH17 503003UFAFH17 100‐120 Ft.‐Lbs. HP450/VHP400WCU-T4F 30 501714UCAFH18 502833UFAFH18 100‐120 Ft.‐Lbs. XP825/HP750WCU-T4F 27 501831UCAFF72 503134UGAFF72 100‐120 Ft.‐Lbs. PORTABLE AIR COMPRESSORS (Reman) Model Affected Serial #’s Wheel Lug Nut Torque HP375WCU 389396REAFB11 100‐120 Ft.‐Lbs. XP375WIR-T3 354296RCAFC48, 363138REAFC48, 412230RFAFC48 100‐120 Ft.‐Lbs. HP750WCU-T1 312205RDAFH42, 325930RDAFH42 100‐120 Ft.‐Lbs. HP750WCU-T3 346794RFAFH37, 353590RDAFH37, 354085RFAFH37, 354087RFAFH37, 364987RDAFH37, 392125RFAFH37, 412321RBAFH37, 425922RBAFH37 100‐120 Ft.‐Lbs. XP825WCU-T1 263729RDAFH43, 283897RGAFH43, 290573RDAFH43, 306991REAFH43, 333214RDAFH43 100‐120 Ft.‐Lbs. XP825WCU-T3 339744RDAFH40, 364986RCAFH40, 415888RBAFH40 100‐120 Ft.‐Lbs. HP915WCU-T3 413412REAFH53, 441557REAFH53 100‐120 Ft.‐Lbs. 704 883 3500 www.doosanportablepower.com DOOSAN and the Doosan logo are trademarks of Doosan Corporation. Doosan Portable Power 1293 Glenway Drive Statesville, NC 28625 Technical Service Bulletin 12-21-6 Damage Call Sheet Complete the call sheet below before calling. • All photos taken shall be labeled for identification of wheel location on unit. Example: Street Side Front (SSF), Street Side Middle (SSM), Street Side Rear (SSR), Curb Side Front (CSF), Curb Side Middle (CSM), Curb Side Rear (CSR). The drawbar denotes the front of the unit. • Ensure all photos and this document are formatted in a manner for emailing. Call 1-800-633-5206 Option #3 to consult with a Doosan Factory Technician for guidance on parts to be replaced. Unit Model Serial Number Unit Hours Number of Axles Damage To: Check wheel location of damaged components observed SSF SSM SSR CSF CSM CSR Studs Wheels Lug Nuts Wheel Hub Leaf Springs Shackles Other Describe Other Damage Observed:
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