874356 Volvo.Penta Bearing

Engine Protection Devices
Inspect For Proper Operation
The engine protective alarm and shutoff controls must be tested, inspected and checked by an authorized Caterpillar dealer at least every year or 1000 hours for proper operation. The manual shutoff functions should be tested to ensure proper operation and protection to the engine. Refer to Engine Control, Monitoring and Protection in the Operation Section in this Manual.Have the checks made by a qualified mechanic. Consult your authorized Caterpillar engine dealer, or refer to the Service Manual for your engine.Verify Alarm and Shutdown Operation
Check for loose, broken, or damaged wiring or components. Check the condition of all sensors and wiring. Repair or replace any broken or malfunctioning sensors before they become a problem. The inspection only takes a few minutes and could avert a potential problem that could cause your engine to fail.Operational Checks
Start the engine. Use the starting procedure found in the Engine Starting topic in this publication.The operational checks are intended to check the engine starting and stopping, lubrication and fuel systems as well as overall operation. The checks should take no longer than five minutes to complete. Longer periods of operation are not required.Automatic Switches
Check that all switches are in proper position for automatic start.The shutoff controls must be checked so that they function properly when they are required. To prevent damage to the engine while performing the test, only authorized personnel or your Caterpillar dealer should perform the checks.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 (125 Hours) due to initial wear and seating of valve train components. Subsequent adjustments should be made at every 1000 Hours.Set the valve lash clearance to the nominal value given in the chart shown in the Engine Specifications section. Refer to the information in the Every 125 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 inlet 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 inlet 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 inspecting the engine mounts for deterioration and proper bolt torque. This will prevent excessive engine vibration caused from deterioration and/or improper mounting. See the Engine Application and Installation Guide for more information.Inspect/Check Vibration Damper
Damage to, or failure of, the damper will increase torsional vibrations and result in damage to the crankshaft and other engine components. A deteriorating vibration damper will cause excessive gear train noise at variable points in the speed range.The vibration damper weight is located inside a fluid filled case. The weight moves in the case to limit torsional vibration. Inspect the dampers for evidence of dents, cracks or leaks of the fluid.