TM 10-3930-659-20 10-5. BRAKE VALVES PRESSURE TEST. This task covers: Pressure Test Initial Setup. Equipment Conditions: Materials/Parts: • Parking brake set (see TM 10-3930-659-10). • Rags (Item 27, Appendix C) • Frame locking bar installed (see TM  10-3930- • Three preformed packings 659-10). • Front cab skirt removed (see paragraph 14-6). Personnel Required:  Two • Hydraulic system warmed to operating References: temperature (see paragraph 2-29). • TM 10-3930659-10 Tools/Test Equipment: • General mechanic's tool kit (Item 44, Appendix F) • Adapter (Item 2, Appendix F) • Quick coupler (Item 10, Appendix F) • Pressure gage (Item 18, Appendix F) • Hose assembly (Item 20, Appendix F) • Tee (Item 39, Appendix F) NOTE • Right and left brake valve pressure tests are performed the same way.  Right brake valve is Illustrated. • If   brake   valve   pressure   test   Is   performed   for   one   brake valve, procedure MUST be repeated for other brake valve. PRESSURE TEST WARNING Pressure   stored   In   accumulator   is   approximately   500   psi   (3448 kPa).        Ensure    that    accumulator    pressure    Is    relieved    before removing  service  brake  hoses  or  components.    Failure  to  follow this warning may result in serious Injury or death to personnel. 10-15