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T; .■® <br /> GEOPROBE OPERATION <br /> March 1998 <br /> CATEGOGEO 4.12 <br /> RY: <br /> PROBE <br /> Push down on this control <br /> to push probes in the <br /> ground;pull up on this <br /> ti control to pull probes out. <br /> HAMMER <br /> Downward movement of this <br /> control activates hammer. <br /> Upward position of the <br /> lever is not used. <br /> FOOT <br /> Downward movement in lever <br /> moves derrick assembly down <br /> with respect to the vehicle. <br /> Upward movement lifts <br /> derrick assembly. <br /> EXTEND <br /> Push this control down to <br /> move derrick out from <br /> vehicle;pull lever up to <br /> move unit in the vehicle. <br /> FOLD <br /> Pull down on this lever to <br /> unfold unit;push up to <br /> fold unit back in. <br /> JO L--j 0Control Panel <br /> Pilot LightUp Position:High throttle with <br /> ; hydraulic system clutch engaged. <br /> 0 Electrical Control <br /> 0 0 (3 position) Middle Position:Hydraulic system <br /> clutch engaged <br /> 0 0 Down Position:System off. <br /> Derrick Slide Geoprobe Model 8-A <br /> Control Panel <br /> Figure 3 Geoprobe Model 8-A Control Panel <br /> 8 <br />