Power Tools and Equipment Chapter 4

Air Compressor and Tools

• An air compressor provides compressed air for automotive service facilities.
• Typical air pressure in shop compressed air systems ranges from 100-150 PSI.
• Quick disconnect couplings allow air hoses and tools to connect without a wrench.
• An electric motor is used to set a specific pressure in the compressed air system.
• Air tools are often referred to as pneumatic tools.
• Lubricating air tools before use helps remove water and prevent damage.

Air Wrenches

• Air wrenches efficiently install or remove nuts and bolts.
• Direction of rotation on an impact wrench is controlled by a button or switch.
• Care is essential when loosening or tightening fasteners with an air wrench to avoid stripping or breaking them.
• An air ratchet is a specialized air wrench for quick fastener removal, typically equipped with a 3/8 inch drive.

Sockets and Torque

• Impact sockets are made from case-hardened steel, thicker and stronger than conventional sockets, which can break easily from impact.
• Impact wrenches should not replace torque wrenches as they may not apply the correct torque specifications.

Air Hammer and Blowgun

• Air hammers are used for driving and cutting operations.
• Always press an air hammer tightly against the workpiece before turning it on.
• Air-powered blowguns are utilized for drying and cleaning parts washed in solvents.

Drilling and Grinding Tools

• Air drills are highly advantageous for repair tasks due to their power output adjustment options.
• Rotary brushes help remove gasket material, carbon deposits, and rust easily.
• Abrasive pads can also be used with air drills.
• Bench grinders are used for grinding, polishing, and cleaning operations and typically have two wheels.
• Key safety rules for bench grinders include wearing eye protection and using shields.

Drill Press and Bits

• Drill bits, often called twist drills, are used for creating holes in metal and plastic.
• Bits are tightened in the drill's chuck, using a special key.
• Drill bits are usually made of carbon steel or high-speed steel.
• A drill press is a large, bench-mounted or floor-mounted drill requiring specific safety protocols.

Hydraulic Tools

• Hydraulic tools operate with pressurized liquid.
• A floor jack should be placed under a solid part of the car to avoid damage.
• A transmission jack is specifically designed to hold transmissions during installation or removal.
• Portable engine cranes raise and assist with engine removal and installation.

Presses and Stands

• Pullers install or remove high-force parts like gears and bearings.
• A hydraulic press operates similarly to a mechanical press but uses hydraulic power.
• Never work under a vehicle supported only by a jack; always use a jack stand for safety.
• An engine stand secures an engine for rebuilding or repairs.

Cleaning and Maintenance Tools

• Cold solvent is used to remove grease and oil from parts.
• High-pressure washers and steam cleaners are effective for cleaning large assemblies, such as engines.
• An oxyacetylene torch joins wires effectively.
• Connect the battery before powering on the charger to prevent battery gas explosions.
• A droplight offers portable lighting for working on vehicles.

Additional Tools

• Battery chargers are vital for starting vehicles with dead batteries.
• Creepers allow technicians to comfortably roll under vehicles without dirt.
• Roll-around cans hold various tools and equipment, providing easy access to enhance efficiency.
• Seat covers protect vehicle surfaces from scratches and grease during maintenance.