Figure 4-41. Checking and Adjusting Rocker Arm to Valve Clearance

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 NAVFAC P-8-622-12 TO-35C2-3-456-1 TM-05682C-12 Figure 4-41. Checking and Adjusting Rocker Arm to Valve Clearance Always check and adjust the valve tappet clearance head. Correct valve clearance is 0.010 for intake when the engine is at an ambient of approximately 70°F (18°C). Remove rocker cover and proceed as follows : Turn blower wheel clockwise only. (1) Using 5/8" socket wrench and extension, turn the blower wheel clockwise until No. 1 cylinder is on its compression stroke, which follows the closing of its intake valve. See figure 4-41 for identification of intake valve assembly. (2) Continue clockwise rotation until the letter “A” appears in the timing port on the side of the generator adapter. This puts No. 1 cylinder in the power stroke with both valves closed. (3) By using a feeler gauge, check the clearance between the rocker arm and the valve stem cap. See figure 4-41. Increase or reduce the clearance until the proper gap is established, adjusting with the lock- nut which secures the rocker arm to the cylinder 4-52 valve, 0.007 for exhaust valve. (4) To adjust the valve clearance for No. 2 cyl- inder, turn the blower wheel clockwise 180° until the letter “B“ appears in the timing port and adjust valves as given in step 3. (5) Install rocker cover and tighten screws 7 to 8 ft-lb. 4-47. INJECTOR NOZZLE ASSEMBLY AND FUEL LINES. a. Inspect. (1) Injector Nozzle Assembly (see figure 4-42). Inspect for leaking fuel. Inspect fuel fittings for tight- ness. (2) Fuel Lines. Inspect fuel lines for leaks and damage to fittings. 4-48. GLOW PLUG ASSEMBLIES. a. Inspect (see figure 4-42). Inspect glow plugs for physical damage. Check that electrical lead to glow

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