TM 10-3930-659-20 10-8. SERVICE BRAKE RESIDUAL PRESSURE TEST. This Task Covers: Pressure Test Initial Setup: Equipment Conditions: Materials/Parts: •    Parking brake set (see TM 10-3930-659-10). •  Three preformed packings •    Frame locking bar installed (see TM 10-3930- 659-10). Personnel Required:  Two •    Front cab skirt removed (see paragraph 14-6). •    Hydraulic system warmed to operating References: temperature (see paragraph 2-29). •· TM 10-3930-659-10 Tools/Test Equipment: •    General mechanic's tool kit (Item 44, Append- ix 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 • Service brake residual pressure test Is performed for both right and left brake valves the same way.  Right brake valve Is Illustrated. •  If  service  brake  residual  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. 10-21