TM5-3810-305-1018. With a 36 mm socket, remove stop pin andlockwasher from torque arm bracket on sideof rotary manifold. Stem stop pin and lock-washer in tool box.19. Disconnect wire harness (Figure 5-17) con-nected to electrical collector ring.20. Relieve pressure in extend-retract valvecircuit by turning ignition switch ON, hold-ing on anti-two block BY-PASS switch andoperating boom telescope lever in both direc-tions several times until pressure is released.Turn ignition switch OFF and proceed as fol-lows:a.b.c.Disconnect boom extend-retract hosequick disconnects from rotary manifold.Remove two plugs size 12 from tool boxand plug hoses.Roll both hoses back to rear opening andhang the right extend hose over lip ofopening. Hang left retract hose over rightextend hose and under tab (Figure 5-18).NOTEMake sure that all capscrews andstop pin are removed from insideupperstructure and wire harnessis disconnected from electricalcollector ring.21. Start engine. Lower hook block 12 in. (305mm) from boom head and proceed as fol-lows:a. Lower boom to horizontal position.b. Shut engine off.Figure 5-18 Location of Boom Extend-Retract HosesAfter Disconnection5-13
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