3–1 SYSTEMS – POWER

TM 1–1520–238–T–1 Change 6 3–5 3–1 SYSTEMS – POWER–UP (cont) 3–1 WARNING The aircraft hydraulic system is pressurized to 3000 psig. Make sure that hydraulic pressure is released before loosening any connections. Failure to comply could result in death or serious injury. NOTE In the event the gun drifts in azimuth during either aircraft power-up or power-down sequence, replace the hydraulic solenoid valve (TM 9-1090-208-23-1) prior to conducting the AWS FD/LS. d. If hydraulics are required, perform the following procedures: (1) Layout the hydraulic hoses in a manner which would prevent kinks and loops. (2) Attach AGPU pressure and return hoses to the PRIMARY and/or UTILITY couplings on the aircraft (TM 1-1520-238-23). (3) Verify all hydraulic hose connections are secured before applying hydraulic pressure. (4) Apply hydraulic pressure to the aircraft via the hydraulic control panel on the AGPU (refer to TM 55-1730-229-12 for operator and AVUM maintenance instructions on the AGPU). WARNING Pneumatic hose and coupling fitting become extremely hot when pneumatic power is applied. Never touch hose or adapter fitting until pneumatic power is removed and the hose and adapter fitting have cooled. Wear proper gloves and eye protection (goggles or equivalent) when operating the pneumatic system.