CONNECTING RODS, PISTONS, RINGS & SLEEVES - CONT

CONNECTING RODS, PISTONS, RINGS & SLEEVES - CONT - TM-5-3820-256-24-5_253

CONNECTING RODS, PISTONS, RINGS & SLEEVES - CONT - TM-5-3820-256-24-5_255

TM-5-3820-256-24-5 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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SERVICE MANUAL CONNECTING RODS, PISTONS, RINGS & SLEEVES Section 5 Figure 27. - Operation of Counterboring Tool 1. Locking screw 2. Adjusting nut 3. Depth of cut 4. Feeler gauge 5. Housing NOTE: An alternate method for setting the depth of cut is to place a feeler gauge of required thickness between the adjusting nut and top housing. Make sure there is no grease or dirt between the adjusting nut and top of the housing. e. Rotate adjusting nut until feeler gauge is just held between adjusting nut and top of housing. All backlash must be removed. f. Tighten locking screw (1, Fig. 27) securely and remove feeler gauge (4) if this ALTERNATE method is used. g. Hold down on the handle applying more pressure on tool bit side and rotate clock-wise until the unit turns freely and is bottomed out between the adjusting nut (2) and top of the NOTE: To avoid damage to the tool bit, never rotate counterclockwise when the tool bit is in contact with the counterbore ledge. h. Measure the counterbore depth as described earlier in steps (6, a-c) of this Section. Continue counterboring as required. 8. Maintain Counterboring Tool as follows: a. Maximum tool bit life, of these accurately ground select carbide bits can be obtained by proper fitting into the tool bit holder and expert regrinding. b. Regrind tool bits as shown in Fig. 27. Figure 28. - Tool Bit Grinding Specifications A. 0.24-0.51 mm (0.010-0.020 in.) B. 8 C. 0.20-0.25 mm (0.008-0.010 in.)R. D. 7° E. 10° F. 6° G. 4.7 mm (3/16 in.) minimum. CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 25

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