TM 10-3930-659-20 12-4. SECONDARY STEERING PUMP RELIEF VALVE PRESSURE TEST (Con't). CAUTION DO NOT operate secondary steering pump and secondary steering pump motor for more than  15  seconds.    Failure  to  follow  this  caution  may  damage  secondary  steering  pump and secondary steering pump motor. NOTE Ensure that engine does not start when operating ignition switch. 6. Turn ignition switch to START position and release to activate secondary steering pump. 7. Note pressure reading on pressure gage (7).  Pressure reading must be 500-600 psi (3448-4137 kPa). NOTE Perform steps 8 through 13 only If pressure reading Is not within specification. 8. Open left engine upper sideshield (see TM 10-3930-659-10). 9. Remove   plug   (10)   and   turn   adjusting   screw   (11)   until   pressure   reading   on   pressure   gage   (7)   is   within specification. 10. Install plug (10) on secondary steering pump (9). TA707556 12-14