TO OVERCOME SLIPPAGE AND CHATTER OR GROAN IN 346-347 MODEL CLUTCHES
Slippage causes clutch chatter or groan. When the Raybestos plates wear, spring pressure becomes less, allowing the clutch to slip. In order to bring the spring tension back to its original pressure, it is necessary to increase the thickness of the clutch plate and disc assembly.
This can be done by removing the 3/16″ Raybestos plate (28Bl54), which is first assembled in the clutch, and replacing it with one 1/8″ Raybestos plate (25B94). Assemble a 1/8″ Raybestos plate and a steel disc until the pack consists of seven Raybestos plates and six steel discs. Now, add another 1/8″ Raybestos plate and assemble the 3/16″ Raybestos plate last. This assembly eliminates one 3/16″ plate, and it uses two additional 1/8″ plates to get an increase of 1/16″
on the spring pressure.
The illustrations show the original assembly and the recommended use.
NOTE: Remove sludge and glaze from surface of Raybestos plate with wire brush before they are assembled.