Engines Lubrication and Maintenance Chart in the Caterpil- lar Operation and Maintenance Management. moving parts of the engine will suffer from poor lu- brication. Cummins 4. Turn off the ignition switch and shut down the en- gine. 1. With the vehicle stopped, apply the parking brakes and place the transmission in neutral. CAUTION 2. Idle the engine three to five minutes before shutting it down. This allows the lubricating oil and the water to carry heat away from the combustion chambers, bearings, shafts, etc. This is especially important with turbocharged engines. Stop the engine at the first sign of malfunction.
Al- most all malfunctions give some warning to the op- erator before significant damage occurs. Many en- gines are saved because alert operators heed warning signs (sudden drop in oil pressure, un- usual noises, etc.) and immediately shut down the engine. Bearings and seals in the turbocharger are sub- jected to the high heat of combustion exhaust gases. While the engine is running, this heat is car- ried away by oil circulation, but if the engine is stopped suddenly, the turbocharger temperature may rise as much 115°F (46°C). The extreme heat may cause bearings to seize or oil seals to leak. Detroit Diesel 1.
With the vehicle stopped, apply the parking brakes and place the transmission in neutral. 3. Do not idle the engine for excessively long periods. Long periods of idling are not good for an engine because the combustion chamber temperatures drop so low the fuel may not burn completely. This will cause carbon to clog the injector spray holes and piston rings and may result in stuck valves. 2. Allow the engine to run at half speed or slower with no load for four to five minutes to cool the engine gradually and uniformly. 3. Turn off the ignition switch and shut down the en- gine.
If the engine coolant temperature becomes too low, raw fuel will wash the lubricating oil off the cylinder walls and dilute the crankcase oil; therefore, all 4.26