TM 9-2350-287-20-12-19. TROUBLESHOOTING CHART (continued).s. UPPER REAR DOOR.The upper rear door is powered hydraulically by the hydraulic actuator. The hydraulic actuator is powered by the primaryrotary pump. The upper rear door is raised and lowered electrically by one of two switches located at the rear of the vehicleat the top of the upper rear door and at the bottom near the APU control box. The upper rear door can also be operatedmanually by the push buttons on either side of the directional control valve located underneath the hydraulic control panel.Change 1 2-273
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