Recalls › 78V030000

NHTSA recall 78V030000

Service brakes, air › Supply › Hoses, lines/piping, and fittings

Mack RL and 3 more

Reported Feb 9, 1978400 vehicles affectedMACK TRUCKS, INCORPORATEDBuilt Dec 1, 1975 – Jan 1, 1978

The defect

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.

The remedy

The dealer will relocate the air system compressor governor line and pressure relief valve to eliminate moisture accumulation.

Official recall at NHTSA ↗

Ask AI about this recallChatGPTClaudePerplexityGoogle AIGrok

Vehicles in this recall

Mack RL
1975197619771978
Mack RS
1975197619771978
Mack WL
1975197619771978
Mack WS
1975197619771978

Notes

Vehicle description: trucks equipped with anchorlok air dryers.system: service brakes; air system and governor control line (air dryer).consequences of defect: when this occurs, automatic application of the chassisemergency spring brakes and trailer brakes could cause loss of vehicle controlwithout prior warning and a vehicle accident.note: owner/driver IS advised not to operate vehicle if air pressure exceeds15o psi.