1975 MACK FS Recalls (2)

Campaign:: 77V173000 on 10/11/1979
Component:: Engine and engine cooling:cooling system:fan
Affected:: 48,000
Defect:: The flex blade fans on the involved vehicles may develop cracks in the laminated stiffener as a result of fatigue during operation. if such a condition exists and the cracks go undetected, continued operation could cause pieces of the stiffener to break off.
Correction:: Dealer will replace the original fan with a steel fixed blade fan, free of charge.
Notes:: Vehicle description: trucks equipped with six-cylinder engines.system: engine cooling; fan.consequences of defect: broken pieces can be propelled outside of the fanshroud and will present an immediate danger and possible injury to personsstanding nearby.note: prior to correction, vehicle should not be serviced with the hood raisedand the engine running.
Campaign:: 75V070000 on 10/11/1979
Component:: Electrical system:wiring
Affected:: 132
Notes:: Mack campaign no k1006.trucks with perlux lamps mfg'd nov.15, 1973 thrujan.2, 1975.possibility that perlux road lamps circuit was wired parallelwith the headlamps.this resulted in an electrical overload and caused thecircuit breaker to cycle or "trip", causing momentary loss of forwardillumination.(correct by inspecting and providing separate circuit breaker toprevent overload).