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6. 25 amp fly wheel alternator. • <br /> 7. 12 volt electric starting system. <br /> 8. Governor with adjustable control, set 2800 r.p.m. , <br /> load 2925 .r.p.m. and idle. <br /> Hydraulic system <br /> 1. Two independent, fully filtered and cooled <br /> hydraulic circuits power all the rig's functions. <br /> The top head rotation and the feed functions will <br /> be on separate circuits. <br /> 2. 32 gallon reservoir with screened filling port and <br /> dip stick. <br /> 3. Tandem hydraulic pumps. Main segment, 20 g.p.m. <br /> and 2000 p.s. i . rotation. Second segment 8 g.p.m. <br /> and 2000 p.s. i. feed. <br /> 4 . Two spin on type replacement oil filters, 33 <br /> micron rating with one way check valves between <br /> filters and reservoir. <br /> 5. Hydraulic oil cooler mounted in front of the <br /> engine. Fly wheel fan provides continuous cooling • <br /> capacity, 20,000 B.T.U. per hour. <br /> X 6. Hydraulic control valves with pressure relief <br /> valves for each circuit. <br /> 7. Hydraulic pressure gauges are provided for all <br /> circuits. <br /> 8. Adjustable flow control valve. <br /> Drill Head <br /> 1. Single hydraulic motor with double chain sprocket <br /> coupling drives., a spindle shaft supported by <br /> tapered roller bearings. Out put of spindle shaft <br /> is 1-1/8 hexpin.. . <br /> 2. Maximum torque is 650 ft. lbs. <br /> 3 . Speed range is 0-150 r.p.m. <br /> 4 . Drill head shall house a hinged .over center quick <br /> latch for easy off hole to provide straight line <br /> access to borehole. <br />