Defect Description For Recall
A Design Deficiency Exists In The Air Dryer Piping In The Area Of The Pressure Relief Valve And Compressor Governor Control Link. Moisture Is Passed And Builds Up In This Relief Valve And Control Line. In Freezing Ambient Temperatures, This Moisture May Freeze, Allowing The Chassis Air System Pressure To Exceed 150 Psi. Excessive Air System Pressure Can Cause Separation Of Air Piping ConneCTIons And Air System Valve Failure.
Make Of Vehicle
MACK
Model Of Vehicle
WS
Year
1977
Recall Campaign Number
78V030000
Component Description
Service Brakes, Air:Supply:Hoses, Lines/Piping, And Fittings
Effect Of Defect
Fix Defect
The Dealer Will Relocate The Air System Compressor Governor Line And Pressure Relief Valve To Eliminate Moisture Accumulation.
Vehicle Manufacturer
Mack Trucks, Incorporated
Start Of Manufacture
19751201
End Of Manufacture
19780101
Type Of Vehicle Recall
V
Number Affected
400
Date Owners Notified
19780823
Initiated By
Mfr
Responsible Manufacturer
Mack Trucks, Inc.
Date Report Received
19780209