NHTSA recall 83V139000
Service brakes, hydraulic › Power assist › Vacuum › Hoses, lines/piping, and fittings
Grumman Kubvan Trucks
The defect
Vacuum lines that help in the operation of the power braking system may collapse under vacuum pressure. Vehicle does not comply with the requirements of federal motor vehicle safety standard no. 106, "brake hoses", since vacuum lines contain material which IS not certified for their application.
The remedy
Dealer will replace hose with one that complies with the safety standard.