1967 GMC E4500 Recalls (3)

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:
67V101000 on 10/11/1979
Component:
Service brakes, hydraulic:power assist:vacuum
Affected:
15,382
Notes:
Possibility that improper length hydraulic brake hose may have been inadvertently installed on one or both sides of the front wheel.brake hoses that are too long will contact the tire or shock absorber during a full right or full left turn.this could chafe the hose and could cause a rupture and loss of braking action.(inspect and install correct length hose as required.)

Campaign:
67V089000 on 10/11/1979
Component:
Service brakes, hydraulic:power assist
Affected:
14,012
Notes:
Possibility that a lack of brake power assist may be caused by a defective check valve or by possible interference between the booster actuating huband dust seal retainer on the firewall.loss of power assist will result in higher than normal brake pedal effort and make it difficult to stop within a satisfac- tory distance.(inspect, test, and replace parts as required.)

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