TUBE AS 1723450 - 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, perform all previous maintenance interval requirements.Valve Lash, Valve Bridge, Injector Timing & Synchronization
Be sure the starting motors are disabled and engine cannot be started while this maintenance is being performed. This warning is very important when the engine is equipped with an automatic start-stop system.
Before operating barring device for turning the crankshaft, operate the prelube pump to ensure correct prelube procedure. DO NOT crank the engine before prelube, especially after this maintenance procedure, to prevent damage to the crankshaft bearings.The lube oil can drain out from between the crankshaft and engine bearings if the engine has not been run for a period of time. Damage can result if the crankshaft is rotated on dry bearing surfaces.DO NOT use the air or electric starters to rotate the engine. If the engine is rotated too fast, oil cannot flow through the openings in the cylinder head fast enough to prevent damage to the combustion seal.
Check/Adjust
All valve lash adjustments after the Initial 3 Month inspection interval are to be performed at Every 6 Months inspection interval. Thoroughly clean the area around the valve mechanism covers to prevent the entry of foreign matter into the top of the cylinder head and valve mechanism.Prelubing the engine is required when the crankshaft is rotated during normal maintenance operations. This includes adjusting valves as well as engine starting. The prelube pump should also be left ON during the time the engine crankshaft is rotated. The intermittent prelube pump should not be operated continuously for extended periods of time. If, during repairs, the intermittent prelube pump has run continuously for a period of three hours or more, it will be necessary to remove any oil that may have collected in the cylinders and/or above the valves.
DO NOT use an impact wrench or pneumatic motor to operate the 1:1 Manual Barring Device.
The manual barring device provides the ability to turn the flywheel and crankshaft. When the barring group gear shaft is engaged, the starting system is disabled. The 50:1 reduction barring group can be operated with an air or electric tool. The tool must be equipped with a cushion clutch and capable of producing the required torque of 6.8 N m (5 lb ft) for engine only or 16.3 N m (12 lb ft) for engine and generator. The flywheel will turn at less than 3 rpm at 700 rpm tool speed.The gear shaft is spring loaded and must be pushed toward the flywheel to engage the pinion with the flywheel ring gear. The barring group handle is used to secure the gear shaft in the engaged or disengaged positions. Rotate the adapter to turn the crankshaft and the crankshaft and flywheel will be locked into the engaged position. To lock the flywheel and crankshaft from turning, tighten guide to a torque of 270 25 N m