Chapter 9 Vehicle Maintenance, Fluid Service, and Recycling 147 Copyright Goodheart-Willcox Co., Inc. systems, the fuel filter can be located at the inlet to the throttle body injector or in the carburetor. Most fuel systems also have a fuel strainer on the pickup tube in the fuel tank. Refer to the service manual for exact filter locations. Warning Wear a full face shield and work gloves when servicing fuel lines. Hold a shop rag around fuel line fittings when loosening them. The shop rag will keep fuel from spraying out due to any residual pressure, preventing a possible explosion and fire. Chassis Lubrication Chassis lubrication generally involves greasing high-friction points on the vehicle. It may also involve lubricating locks, hinges, latches, and other body parts. Chassis lubrication of control arms and ball joints is often done when the engine oil and filter are serviced. Tech Tip Control arms and ball joints are sealed on most pas- senger vehicles, so further lubrication may not be necessary anymore on these parts. Grease Job During a grease job, you must lubricate high- friction pivot points on the suspension, steering, and drive train systems. Most service manuals illustrate which parts must be lubricated, Figure 9-16. A grease gun, Figure 9-17, is used to force lubricant (chassis grease) into small fittings. Inject only enough grease to fill the cavity in the part. Overgreas- ing can sometimes rupture the rubber boot surround- ing the joint. Check for grease fittings at tie-rod ends Grease fittings on upper and lower ball joints Universal joint may have grease fittings Red dots indicate possible grease fitting locations Goodheart-Willcox Publisher Figure 9-16. A grease job involves lubricating the pivot points shown. Some cars have more grease fittings than others. Check closely on steering and suspension components, as well as on drive shafts. Goodheart-Willcox Publisher Figure 9-17. This technician is using a power grease gun to lubricate fittings on a suspension system.