TM 5-3820-256-10NOTEAn engine at or near operating temperature may bestarted with the throttle (7) at IDLE or partial throttle.(c)After the engine is running, reduce engine speed to approximately 1000 RPM and allow engine to warmup three to five minutes before applying a load. During warm-up, observe all gages for proper readings.CAUTIONDo not increase engine speed until the oil pressure gage(3, figure 2-11) indicates normal (25-30 PSI). Shutengine down if oil pressure does not register on thegage within 20 to 30 seconds after starting.(6) Set the throttle (7, figure 2-11) to the desired engine rpm. Read the rpm's on the tachometer (4).d.Extendrotarytable.Remove the jib pins from the rotary table sliding base. Check that there are no obstructions thatwould interfere with the tables movement from its retracted position to the extended position. Operate the tableretract control (4, figure 2-8) to the OUT position and extend the table to its extended position; then release thecontrol. Reinstall jib pins in the rotary table sliding base.e.Levelingtheriq.NOTEBefore leveling the rig, sight through the rotary tableopening to see if the rig is positioned correctly over thehole site. If not, reposition the rig before proceeding.(1) If terrain or ground conditions dictate, place supporting timbers under the hydraulic jacks. Unsnap the safetychain that holds each jack in the retracted position.(2) Check that tachometer indicates the desired rpm's; adjust throttle accordingly. Check that gages--hydraulicpressure (1, figure 2-12) and oil temperature (2) indicate within prescribed operating ranges.(3) Observe the level gage on frame near jack controls and determine which corner of the drill frame is lowest.Move the corresponding jack control (3, 4, 5, or 6, figure 2-12) to DOWN and hold until the corner is raised toapproximately level.2-48
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