1968 GMC E4500 Recalls (2)

Campaign:: 69V039000 on 10/11/1979
Component:: Service brakes, hydraulic:foundation components:master cylinder
Affected:: 163,493
Notes:: Possibility that seal on piston in master brake cylinder may, after extendedusage, allow brake fluid to pass seal permitting brake pedal to be pushed tofloor in a slow gradual stop or upon the first ap- plication of brakes aftervehicle has been standing for a period of time.is also a possibility thatinner liner of vacuum hose which connects to brake vacuum booster may collapse,causing loss of power brake assist.(correct by installing new parts in brakemaster cylinder and modifying vacuum hose rout- ing.)
Campaign:: 70V016000 on 10/11/1979
Component:: Service brakes, hydraulic:foundation components:hoses, lines/piping, and fittings
Affected:: 25,950
Notes:: Possibility that during operation steel brake line at rear axle could chafe onleft rear shock absorber, and that front brake hoses on school buses maycontact tire, shock absorber or steering arm.continued chafing could wearhole in hose or line at point of contact, causing loss of hydraulic brakefluid.(correct by inspecting and re-routing steel line and adding additionalclip to hold hose.)