TM10-3930-660-20 18-3. HYDRAULIC  SYSTEM  -  SERVICE  (Cont’d) C. Place auxiliary fuel shut-off switch in the “off” position, TM10-3930-660-10. A solid stream will flow out of both loosened hoses (6) and (8) when air is purged from pump (l). d. Crank engine until solid stream of fluid is flowing from both hoses (6) and (8). While continuing to crank engine, have assistant tighten hoses (6) and (8). e. Stop cranking engine. Place auxiliary fuel shut-off switch in the “ON” position, TM10-3930-660-10. If pump (5) will not pump oil after purging, further troubleshooting is required, para. 2-12. 2. CHECK HYDRAULIC OIL LEVEL, FILL HYDRAULIC RESERVOIR AS REQUIRED, AND CHECK FOR LEAKS, LO10-3930-660-12. 18-5