ENGINE FEATURES- cont

ENGINE FEATURES - cont - TM-5-3820-256-24-5_118

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 INTRODUCTION Introduction DESCRIPTION Cylinder sleeves are of the replaceable, wet-type which are surrounded by water to provide immediate positive heat dissipation. The sleeves are machined by a special process called Plateau-Honing. This process provides a sleeve finish which results in rapid engine run-in. Induction hardening of the sleeves I.D. results in low wear rates and long life. (Hardening is used only on certain applications with higher HP ratings). The block is made of high strength alloy iron which minimizes weight without sacrificing engine rigidity. An outstanding feature of the 400 series engines Is that crankshaft wear is distributed over 7 main bearings rather than 4 main bearings which is common among competitive make engines. The crankshaft Is constructed of induction hardened forged steel; International not only Induction hardens the journal areas, but the fillet areas as well on 466 Series Engines, since this area is where crankshaft failures often occur. CGES- 185-3 *PRINTED IN UNITED STATES OF AMERICA Page 3

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