34 Auto Brakes Copyright by Goodheart-Willcox Co., Inc. Specialized Brake Tools In addition to the tools previously described, many special brake tools make brake service easier. Some of the more common types are explained below. Seal and Dust Boot Installers Seal and dust boot installers, Figure 3-17, are useful when a caliper or wheel cylinder must be rebuilt, or when a wheel bearing grease seal must be installed. Th e installer will seat the new part without damaging it. Most installers are used by fi rst placing the dust boot seal onto the installer. Th e installer is placed over the part, and the seal is then gently tapped into position. Th e tool is removed, leaving the seal properly installed. Th ere are other special seal installers used when servicing power boosters and some anti-lock brake systems. Wheel Bearing Service Tools Wheel bearing service tools include packers, adjusters, and race removers. Some tools are needed to remove old grease from bearings and to pack grease into the cleaned or new bearings, Figure 3-18. While there are specialized bear- ing race installers, punches and brass drift s can be used to remove and install bearing races. Hydraulic System Tools Special tools for use on the hydraulic system include siphons and syringes, Figure 3-19. Th ese tools are useful for drawing out excess fl uid from the master cylinder reservoir. In many cases, the master cylinder will become overfi lled when the disc brake calipers are pushed back into their bores. Th e brake fl uid should not be allowed to spill out the master cylinder, as it could cause damage to other engine parts or vehicle paint. To make the job of bleeding brakes easier and neater, a clear jar and rubber hoses are used. One end of the hose is slipped over the open bleeder screw and the other end is placed in the jar, which is half full of fl uid. When the brake pedal is pushed, air in the system is pumped through the hose into the jar, where it rises to the top. Th e bleeder is closed, and the pedal is released. Fluid from the master cyl- inder reservoir replaces the fl uid and air removed from the system. Figure 3-20 shows a hose and jar being used to bleed brakes. Hammer Dust boot installer extension Dust boot installer Dust boot Caliper Chrysler Figure 3-17. Seating a caliper piston dust boot with the correct installation tool and hammer. Brake fluid Syringe Goodheart-Willcox Publisher Figure 3-18. Wheel bearings being lubricated with fresh grease while secured in one type of bearing lube fixture. EIS Figure 3-19. Brake syringe being used to clean a check valve.