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Valve clearance or valve lash is measured with a feeler gauge setting Gage put between the rocker arm contact and the bridge wear seat. Valve clearance is changed using a screwdriver. A 3/4 inch wrench is needed to loosen and tighten the lock-nut which holds the adjustment screw. To make the adjustment, turn the adjustment screw until you feel an easy pull on the feeler gauge as you move it backward and forward between the rocker arm contact and the bridge wear seat. Tighten the nut on the adjustment screw and check the adjustment to be sure it has not changed. The adjustment of all valves and the injectors can be done by putting the engine crankshaft in two positions. Refer to the Service Manual for these procedures.

Caterpillar Engine Turbocharger. An exhaust driven air compressor. Impeller on the left side of turbocharger. Turbine on the right side. Connecting shaft,free floating bearing,oil lubrication center housing. Causes Of Premature Wear or Failure. Poor oil quality. Dirt ingestion. Hot engine shutdown. Signs up quicker for good engine response. Regulates turbocharger speed and prevents over speeding. The wastegate is opened by the high pressure boost in the compressor side of the turbocharger. Some of the exhaust gas then bypasses the turbine and escapes wastes to the exhaust stack. Caterpillar Engine Turbocharger Failure. If the turbocharger fails during engine operation  damage to the turbocharger compressor wheel or to the engine may occur.Damage to the turbocharger compressor wheel could allow parts from the compresser wheel to enter an engine cylinder.This can cause additional additional damage to the the piston,valves and the cylinder head. Turbocharger 

Caterpillar Engine Cooling System Components. Water pump. Oil cooler. Passages through block and . Temperature regulator and regulator housing. Radiator. Pressure cap. Hoses and pipes. Caterpillar Engine Cooling System. Coolent flows through the passages in the cylinder block in to the cylinder head. Water seals between the head and cylinder block prevent coolent leaks. Some engines have water ferrules to direct coolant to critical areas. Caterpillar  Engine  Cylinder  cooling  system. Coolant flows arround the cylinder liners. Absorbs heat from the combustion chamber. Prevents break down of oil film between pistons and cylinder liners.

Caterpillar Engine Lubrication System Components. Oil Pump. Relief Vavle. Oil Cooler. Oil Filter. Bypass Valve. Oil level Gauge (Dipstick). Oil Pressure Gauge. Oil Pan. Caterpillar Engine Lubrication System. Caterpillar Engine Causes of Lubrication System Wear & Failure. Single largest problem is short engine lift due to excessive soot in the oil. Poor quality low performance engine oil. Extended oil change intervals. Poor maintenance projects. Fuel dilution. Wear lubrication system caused. Seals and bearing. Turbo. Crank main rod. Valve and guide.

Caterpillar Engine Lubrication Oil System. Caterpillar engine crank shaft failures due to oil contamination. Caterpillar Engine Function of Lubrication System. Cleans.  Parts. Cylinder. Cools. Seals and Lubricates. Support. Separate. Caterpillar Engine Lubrication System Components. Oil Pump. Relief Vavle. Oil Cooler. Oil Filter. Bypass Valve. Oil level Gauge (Dipstick). Oil Pressure Gauge. Oil Pan . Caterpillar Engine Lubrication System. Caterpillar Engine Causes of Lubrication System Wear & Failure.