TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM9-2320-387-24-l 1 l-26. SERVICE BRAKE SYSTEM OPERATION 1 The service brake system is identical for both models covered in this manual. It is an inboard-mounted, four- wheel, disc brake, hydraulically-assisted system. Major components of the braking system are: 0 A 0 B 0 C 0 D 0 E 0 F 0 G BRAKE LINEAGE - Directs brake pedal pressure to hydro-booster. HYDRO-BOOSTER - Converts hydraulic power from the steering pump to mechanical power to the master cylinder, providing power assist during braking. MASTER CYLINDEIURESERVOIR - Stores brake fluid, and converts mechanical pedal pressure to hydraulic pressure. PROPORTIONING VALVE - Provides balanced front-to-rear braking and activates brake warning lamp in case of brake system malfunction. ACCUMIJLATOR - Stores hydraulic pressure for additional power-assisted braking in case of loss of pressure in steering system. BRARE PEDAL - Provides operator control for stopping vehicle. BRAKE PRESSURE LIMITER - Limits front brake line pressure to prevent brake lockup. 1-33