NHTSA Campaign Id 77V005000; Date: Jan. 13, 1977
1976 International Harvester Fleetstar Series; 1977 International Harvester Fleetstar Series
Component: Service Brakes, Hydraulic:power Assist:vacuum:hoses, Lines/piping, And Fittings
Manufactured by: International Harvester
Affected Units:: 20
On the involved vehicles, the hose used to supply vacuum to the brake power unit or vacuum reserve tank may have been of the wrong material. This hose could deform sufficiently during normal operation to cause a reduction in vacuum assist to the brake power unit. This would result in greater brake pedal effort by operator and an increase in vehicle stopping distances.
The dealer will inspect and, if necessary, remove incorrect hose and install the proper vacuum hose.
Vehicle description: trucks. System: service brakes; vacuum hose. Consequences of defect: this condition could cause loss of vehicle control andan accident. Note: until the necessary corrections are made, the vehicle should be operatedat reduced speeds, vehicle following distances should be increased, and drivershould become familiarized with parking (hand) lever operation so that it canbe used to supplement the service (foot) brake in an emergency situation.
Date Owners notified by Manufacturer: Jan 28, 1977
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