TM 5-6115-593-12TO 35C2-3-463-1temperature. After engine has warmed up tonormal operating temperature, check valve lashagain for proper clearance.CAUTIONAfter any mechanical work has beendone that may have disturbed thevalve lash adjustment, ensure therocker arm adjusting screws areturned upward (counterclockwise)high enough to prevent rocker armsand push rods from opening too far,the pistons, will strike the valveswhen the engine is turned over.Observe the rocker arms of theopposite cylinder. Rotate crank- shaftuntil both rockers arms movesimultaneously then continue forapproximately 1/4 revolution. At thispoint, both valves are closed andvalve lash may be adjusted.Section XXVII. MAINTENANCE OF BASE ASSEMBLY4-88. GENERAL. This base assembly, figure 4-60,consists of a rigid frame skid base, fuel tank, and relatedcomponents. The tank is recess-mounted in the skidbase. The engine and generator are mounted on theskid base assembly.4-89. INSPECTION.a.Inspect the skid base and frame assembly forrust, corrosion, breaks and loose hardware.b.Inspect the fuel tank for dents, cracks, ordistortion.c.Inspect threaded holes in the base assembly fordamaged threads.d.Inspect the oil and fuel drain plug and hosesbetween skid base and engine for leaks.e.Inspect ground studs for stripped threads andlooseness.f.Inspect coolant and oil drain plugs for strippedthreads, deformation, or leakage.4-90. REPAIR.a.BaseSubassembly.(1) With stiff bristle brush, remove heavilyconcentrated grease and dirt.(2) Clean the skid base with cleaning solvent,Federal Specification P-D-680.(3) Repair cracks in skid base by welding orbrazing. Fill or sand weld marks to an evenfinish.(4) Repair threads in tapped holes by retapping.(5) Repaint as necessary.b.Fuel Tank. Warning switches and transmittermust be removed before repairing fuel tank.Refer to paragraphs 4-55 and 4-56 for test andreplacement of these items.NOTEWhenever fittings are replaced on thefuel tank, use sealing compound (MIL-S07916C).(1) Drain all fuel from tank. Flush inside of tankwith steam under pressure. Rinse with hotwater and detergent to remove flakes orother foreign matter.(2) Fuel tank must withstand an internalpressure of 0.5 psi. Seal all tank openings,apply pressure, and check for leaks (use aleak test solution or soapy water). Shouldtank leak, weld in accordance with4-127
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