Rigid plastics like ABS, polycarbonate (trade name Lexan), and acrylic materials like Plexiglass can be very sensitive to harsh solvents like toluene, xylene, and acetone. Alcohol- and hydrocarbon-based solvents tend to be better choices for sensitive plastics.
Rubber, silicone or other seals or gaskets made of elastomeric (soft) materials can have a tendency to swell or shrink with exposure to harsh solvents. After the solvent flashes off, they may spring back to their original dimensions, or be permanently changed, impacting the effectiveness of the seal. Polyester- or Teflon-based gasketing materials are less prone to this type of damage from harsh solvents.
A new degreaser should always be tested before use on any questionable applications or using any live (and expensive) equipment. If you do have very sensitive materials to clean, Techspray offers E-LINE Maintenance Cleaner and Precision-V Maintenance Cleaner & Flux Remover which are compatible with broad array of sensitive materials.