RL: SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS

Go Back To 1977 MACK TRUCKS, INC Directory

NHTSA Campaign Number:	78V030000
Vehicle/Equipment Make:	MACK
Vehicle/Equipment Model:	RL
Model Year:	1977
Manufacturer Campaign Number:
Manufacturer Component Description:	SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
Manufacturers Involved in Recall:	MACK TRUCKS, INCORPORATED
Manufacturered:	19751201 - 19780101
Type of Report:	V (Vehicle, Equipment or Tire)
Potential Number of Units Affected:	400
Date Owner Notified By Manufacturer:	19780823
Recall Initiated By:	19780823
Manufacturer Responsible For Recall:	MACK TRUCKS, INC
Report Received Date:	19780209
Record Creation Date:	19791012
Regulation Part Number:
Federal Motor Vehicle Safety Standard Number:
Defect Summary:	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.
Consequence Summary:
Corrective Summary:	THE DEALER WILL RELOCATE THE AIR SYSTEM COMPRESSOR GOVERNOR LINE AND PRESSURE RELIEF VALVE TO ELIMINATE MOISTURE ACCUMULATION.

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