TM 9-2320-209-10-1 FRAME 4 1. Close valve by turning pressure gage control handle (1) left and placing pointer between position NO. 1 and position NO. 2. 2. Tell organizational maintenance if any of following conditions exist: (a) Difference between readings taken in position NO. 1 (inlet pressure) and position NO. 2 (outlet pressure) is more than 20 psi. (b) Difference between readings taken in position NO. 1 (inlet pressure) and position NO. 3 (internal pressure) is more than 15 psi. (c) Difference between readings taken in position NO. 2 (outlet pressure) , and position NO. 3 (internal pressure) is more than 15 psi. 3. Take off ground wires and close rear compartment doors. (Refer to para 4-9d frame 7). 4. Take off power to pump. (Refer to para 4-9d, frame 8). 4-142