TM 10-3930-659-20 12-27.    PRIORITY VALVE RELIEF PRESSURE TEST (Con’t). 3. Install   hose   (9)   and   pressure   gage   (8)   on adapter (4). 4. Start   engine   and   operate   at   fast   engine   Idle speed (see TM 10-3930-659-10). NOTE • Some rotation of steering wheel Is normal.  Excessive rotation of steering wheel while frame Is locked Indicates leakage In steering system. • Steering wheel must be turned rapidly to obtain accurate reading on pressure gage. 5. Holding  firm,  constant  pressure  on  steering  wheel,  turn  steering  wheel  rapidly.    Note  pressure  reading  on pressure gage (8).  Reading must be 2500-2600 psi (17,238-17,927 kPa). 6. Shut down engine (see TM 10-3930-659-10).  If pressure reading was within specification in step 5, perform step 11. TA707605 12-68