Perkins 4012-46A Maintenance Manual
![Perkins 4012-46A Engine manual cover](/images/uGUoJFWcUHqbHgHeTtXInAaM/thumbs/thumb175x175.webp)
The recommended oil type for the Perkins 4012-46A engine is a high-quality, heavy-duty diesel engine oil that meets or exceeds API CI-4/CH-4 specifications.
Routine maintenance should be performed every 250 hours of operation or at least once a year, whichever comes first. This includes checking fluid levels, inspecting belts and hoses, and replacing filters.
To bleed the fuel system, start by loosening the bleed screws on the fuel filter and injection pump. Manually pump the fuel lift pump until fuel free of air bubbles flows from the bleed screws, then tighten them securely.
Signs of a failing turbocharger include excessive exhaust smoke, loss of engine power, unusual noises from the turbocharger, and increased oil consumption.
To troubleshoot overheating, check the coolant level and inspect the radiator for blockages. Verify that the thermostat is functioning correctly and ensure that the water pump and fan are in good working condition.
The recommended coolant type is an ethylene glycol-based antifreeze mixed with water at a 50:50 ratio. The cooling system capacity is approximately 140 liters.
To adjust the valve clearance, remove the valve covers and rotate the engine to bring each cylinder to TDC on the compression stroke. Use a feeler gauge to check and adjust the clearance according to the engine manual specifications.
Common causes of black smoke include a dirty air filter, over-fueling, faulty injectors, or poor turbocharger performance. Address these issues by cleaning or replacing the air filter, checking injectors, and inspecting the turbocharger.
Identify an oil leak by inspecting common leak points such as gaskets, seals, and the oil filter. Fix leaks by replacing damaged gaskets or seals and ensuring all bolts are properly tightened.
For long-term storage, drain the fuel system, change the oil, and add a corrosion inhibitor to the coolant. Disconnect the battery, cover the engine, and store it in a dry, covered area.