Firebird V8-305 5.0L VIN F FI (1987)
Drive Belt: Technical Service Bulletins
Generator - CS Belt Tensioning
Number 87-6(Gasoline)-59
Date 8/87
Subject:
GENERATOR BELT TENSIONING - CS GENERATORS
FIREBIRD, GRAND AM, AND FIERO MODELS
Some models of the above vehicles are equipped with CS-121, CS-130, or CS-144 Delcotron Generators and without automatic belt tensioning
equipment.. On these applications, the generator belt tension is adjusted by forcing the generator against the belt until the vehicle manufacturer's belt
tension specification is reached. When adjusting the belt tension for a CS-Generator in this manner, it is important that the force be applied properly to
avoid damaging the generator.
As with several other Delcotron models, the CS-Series housing includes an adjustment lug on the drive end frame (see illustration) which should be used
to push the generator against the belt while the adjustment bolt is tightened. A 3/4" wrench (or equivalent) should be used when holding the generator by
this lug.
If the vehicle configuration does not permit use of the adjustment lug, pressure may be applied to the side of the drive end frame to tighten the belt. If
pressure cannot be applied directly to the drive end frame, a block of wood should be inserted between the prying instrument and the side of the
generator to distribute the force to a wider area which includes the drive end frame. Do not pry directly against the stator or slip ring end frame.
