Engineering Analysis · Closed
OVERHEATING DISC BRAKE CALIPER
Manufacturer: WORKHORSE CUSTOM CHASSIS
This investigation led to a recall
NHTSA links this probe to recall campaign 09V217000.
Read the recall: what is defective and the free fix →What NHTSA is examining
The ea was opened to gain a technical understanding of the causes for one or more disc brake calipers on a subject vehicle to suffer severe overheating. The overheating caused brake drag, melting abs sensors, smoking, brake lining fires, and in some cases boiling brake fluid resulting in diminished stopping capability.based on testing, warranty and complaint data analysis, field trips and interviews with owners, mechanics and service managers, odi believes the likely cause of the alleged defect is water swell of the phenolic caliper piston and subsequent failure of the piston to fully return after the pedal is released.a technical report is attached with full details.
Vehicles under investigation
Source: NHTSA Office of Defects Investigation records, updated daily. An investigation is not a determination that a defect exists; many probes close without a recall.