Section XI. 4-29. FUNCTION AND DESCRIPTION The diesel engine has pressure Iubrication to all working parts (see figure 4-27). The oil system includes oil intake cup, gear type oil pump, bypass valve, oil pressure gauge, low oil pressure shutoff, full-flow oil filter, oil coder, and passages to de- liver oil throughout the engine. Oil is held in the oil base, and forced through the oil filter and oil cooler by the pump. Lines leading to the rocker housing, passages through the block to crankshaft and front camshaft bearing, crankshaft passages to connecting rod bearings and connecting rod passages to piston pin bushings complete the oil system network The bypass valve controls oil pressure by allowtng excess oil to flow directly back to the crankcase. 4-30. OIL COOLER a. Inspect (see figure 4-28). On ASK equipped generators, remove ASK cover assembly (para 5-3). Inspect oil cooler (1) for physical damage. Visually check for leaks where oil cooler is connected to oil hoses (figure 4-29). Check that cooler Is securely fastened to mounting plate (2, figure 4-28) and that plate is securely fastened to engine. Inspect all hoses for Figure 4-26. Adjusting Starter Lockout Switch MAINTENANCE OF OIL SYSTEM

Figure 4-25. Starter Lockout Switch and Gear Assembly

TM-5-6115-584-12 Generator Set Diesel Engine Driven Tactical Skid Mtd. 30 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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TM 5-6115-584-12 NAVPAC P-8-622-12 TO-35C2-3-456-1 TM-05682C-12 (20) and spring (12). Slide gear (5) out through opening in engine back plate. Clean any gasket (13) material from switch and back plate. d. Repair. Repair starter lockout switch by re- placing parts found to be defective under inspection e. Replace. Make certain spacer (16) is on shaft and slip timing gear (5) through opening in engine back plate. Make certain that shaft seats properly in gear cover and that gear teeth are properly meshed. Place thrust plunger (20) and spring (12) in gear shaft. Slide switch and gasket (13) over shaft and attach to engine back plate with two screws (9) and Iockwashers (10). Use a new gasket (13) between switch and engine back plate. Reconnect electrical connector (8). f. Adjust. With engine stopped, remove cover re- taining wing nut (1) and remove cover (3). Turn adjusting screw (14) clockwise until points open. Turn adjusting screw counterclockwise until points just ClOSe (see figure 4-26). Start engine and dis- connect switch from wiring harness at connector (8, figure 4-25). Adjust adjusting screw for a 0.040 point gap. Replace cover (3) and wing nut (1). Reconnect connector (8). Be sure two wires are recessed in slot of housing before tightening cover down. Section XI. 4-29. FUNCTION AND DESCRIPTION The diesel engine has pressure Iubrication to all working parts (see figure 4-27). The oil system includes oil intake cup, gear type oil pump, bypass valve, oil pressure gauge, low oil pressure shutoff, full-flow oil filter, oil coder, and passages to de- liver oil throughout the engine. Oil is held in the oil base, and forced through the oil filter and oil cooler by the pump. Lines leading to the rocker housing, passages through the block to crankshaft and front camshaft bearing, crankshaft passages to connecting rod bearings and connecting rod passages to piston pin bushings complete the oil system network The bypass valve controls oil pressure by allowtng excess oil to flow directly back to the crankcase. 4-30. OIL COOLER a. Inspect (see figure 4-28). On ASK equipped generators, remove ASK cover assembly (para 5-3). Inspect oil cooler (1) for physical damage. Visually check for leaks where oil cooler is connected to oil hoses (figure 4-29). Check that cooler Is securely fastened to mounting plate (2, figure 4-28) and that plate is securely fastened to engine. Inspect all hoses for Figure 4-26. Adjusting Starter Lockout Switch MAINTENANCE OF OIL SYSTEM leaks and physical damage. Inspect seal (1A, figure 4-28) and replace if damaged. Blower housing must be removed to inspect cooler and hoses. b. Service. Every 500 operating hours clean oil cooler fins with air gun (50 psi) held 12 inches away from the fins. Every 2500 operating hours remove oil cooler and flush in both directions using solvent at 25 psi. c. Remove. Remove blower housing. Disconnect oil cooler hoses at valve of oil filter adapter (see figure 4-29), Drain cooler into suitable container. Remove four machine screws (3, figure 4-26) and special U- shaped washers (4) attaching oil cooler (1) and oil cooler seal (1A) to mounting plate (2) and remove cooler (1). Remove and check hoses. Plug hose if not used immediately. d. Replace. Install oil cooler (1) and oil cooler seal (1A) on mounting plate (2) and secure with screws (3) and special U-shaped washers (4), Attach oil hoses to cooler as shown in figure 4-29. Replace blower housing shown in figure 4-29. Replace blower housing, Replace any oil lost. On ASK equipped generators, replace ASK cover assembly (para 5-3). Change 7 4-33

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