CRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASE - CONT

CRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASE - CONT - TM-5-3820-256-24-5_282

CRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASE - CONT - TM-5-3820-256-24-5_284

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 CRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASE Section 6 d. Hold the crankshaft towards the rear of the engine and check the clearance across the bearing split. If the clearance is more than specified, replace the rear main bearing with a new one. e. With the feeler gauge in place, tighten the rear main bearing cap to 155 N•m (115 Ibf- ft) torque. f. Remove the feeler gauge and wedging tool. 2. Pull the connecting rods down onto the crankshaft. Be sure that the bearings are in place. a. Install the connecting rod bearings and bearing caps. Make sure that the correct cap is located on its rod and that the identifying numbers are on the intake manifold side of the engine. b. Oil the bearings with clean engine oil. c. Torque the connecting rod bolts to 175 N•m (130 Ibf-ft). 3. Recheck the connecting rod end clearance as described in Section 5. 4. Install a new rear oil seal as outlined. a. Inspect the oil seal bore for a chamfer. If no chamfer is found, use a file to break the edge of the bore. This will prevent possible damage to the oil seal casing during installation. CAUTION: Care should be taken not to damage the bore while filing the chamfer edge. b. Prior to wear sleeve and oil seal installation, clean the bore and crankshaft of all foreign material. c. Use the wear sleeve and oil seal installing tool (see tool list for tool number) as shown in Fig. 31. Figure 31. - Wear Sleeve and Oil Seal Installer 1. Centering plate 2. Installing tool 3. Allen head screws d. If the oil seal and wear sleeve are NOT unitized (preassembled), assemble seal to sleeve prior to installing onto crankshaft as follows: 1. Clean and lubricate single lip seal with grade 251 H-EP grease or clean engine oil. 2. Fill double lip seal with grade 251H-EP grease at cavity between lips. 3. Assemble seal onto sleeve as shown in Fig. 32 by pushing the seal in the direction of the arrow. NOTE: Seal must be installed onto side of sleeve with chamfer on O.D. (2, Fig. 32) to avoid damage to seal lip. CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 24

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