TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
Page 643 of 670
TM9-2815-202-34 APPENDIX G ENGINE REPAIR SPECIFICATIONS Section I. INTRODUCTION G-1. SCOPE This appendix lists the repair specifications for the 8V71T series engines. G-2. EXPLANATION OF COLUMNS a. Column 1 -- Point of Measurement. This column lists the area of the engine (e.g., “Cylinder Block), then lists the specific component (e.g., “Main Bearing Bore”), and finally describes the critical dimension (e.g., “Inside diameter”). b. Column 2 -- New Minimum. This column lists the minimum acceptable dimension of the new part. All dimensions are in inches unless stated differently. c. Column 3 -- New Maximum. This column lists the maximum acceptable dimension of the new part. All dimensions are in inches unless stated differently. d. Column 4 -- Wear Limit. This column lists the maximum acceptable deviation for the used part. All dimensions are in inches unless stated differently. An asterisk (*) in this column indicates the part must keep the same minimum and maximum limit as the new part. Section Il. ENGINE REPAIR SPECIFICATIONS NEW NEW WEAR POINT OF MEASUREMENT MINIMUM MAXIMUM LIMIT (inches) (inches) (inches) CYLINDER BLOCK Cylinder Sleeve Bore Inside diameter of bore 4.6256 4.6275 4.6275 Oversize (0.010) 4.6360 4.6370 4.6375 Oversize (0.020) 4.6460 4.6470 4.6475 Oversize (0.030) 4.6560 4.6570 4.6575 Sleeve bore out-of-round 0.0010 0.0020 Taper of sleeve bore 0.0010 0.0020 Cylinder Sleeve Counterbore Inside diameter of counterbore 5.0460 5.0510 * Depth of counterbore 0.4770 0.4795 * Main Bearing Bore Inside diameter of bearing bore 4.8120 4.8130 * Camshaft Bearing Bore Inside diameter of bearing bore 2.1875 2.1889 * G-1