SEAL-INTEGRAL 1262704 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.Before proceeding with this maintenance interval, perform all previous maintenance interval requirements.Engine Valve Lash
Check/Adjust
Initial valve lash adjustment on new, or rebuilt engines is recommended and should have been performed at the first normally scheduled oil change interval (250 Hours) due to initial wear and seating of valve train components. Subsequent adjustments should be made at every 3000 Hours. Set the valve lash clearance to the nominal value given in the Valve Lash Setting chart shown previously in this manual. Refer to the information in the Every 250 Hour maintenance and the Service Manual for the procedure. Turbochargers
If the engine is operated until the component(s) fails, it could cause additional damage to the engine. Damage to the turbocharger compressor wheel could cause parts from the compressor wheel to enter the engine cylinder and cause additional damage to the piston, valve and cylinder head.Inspect for Proper Operation
Turbocharger bearing failures can cause large quantities of oil to enter the air intake and exhaust systems. Loss of engine lubricant can result in serious engine damage.Minor leakage of a turbocharger housing under extended low idle operation will not cause problems as long as no turbocharger bearing failure occurred. When a turbocharger bearing failure is accompanied by a significant engine performance loss (exhaust smoke or engine speed up at no load), DO NOT continue engine operation until the turbocharger is repaired or replaced.
1. Remove the exhaust outlet piping and inlet piping from the turbocharger. Visually check for oil leaks. 2. Turn the turbine and compressor wheel by hand.3. The assembly should turn freely.4. Inspect the turbine wheel and compressor wheel for contact with the turbocharger housing. 5. There should NOT be any visible signs of contact between the turbine or compressor wheel and the turbocharger housing. Check the compressor wheel for cleanliness. If only the blade side of the wheel is dirty, dirt and/or moisture is passing through the air filtering system.If oil is found only on the back side of the wheel, it indicates a turbo oil seal leak. The leak may be the result of extended engine operation at low idle or an intake air line restriction (plugged filters).Maintain the compressor wheel/turbo housing by cleaning with standard shop solvents and a soft bristle brush.6. Check the end play and the bearing clearance on the turbine wheel and shaft. Refer to the Service Manual for the procedure and specifications. If the measurements are not within specifications, the turbocharger must be repaired or replaced. See your Caterpillar dealer for repair or replacement options. To minimize downtime, Caterpillar recommends the use of a Remanufactured turbocharger. When installing or replacing V-band clamps, position the gap (tightening screw) down if possible so any accumulation of moisture (water condensation) will drain away. 7. Visually check for oil leaks after engine is started and during operation. Engine Mounts and Crankshaft Vibration Damper
Inspect/Check Engine Mounts
Caterpillar recommends