Generator - Belt Tension Adjustment
87chevy25Number: 87-214
Section: 6D
Date: SEPT., 1987
Subject: GENERATOR BELT TENSIONING - CS GENERATORS
Model and Year: CAMARO AND C/K TRUCKS WITH CS GENERATORS
TO: ALL CHEVROLET DEALERS
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 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.