The engine should be run in after major repair or following maintenance. The main bearing, connecting rod bearing, crankshaft or any combination of these parts have been replaced. The piston, ring or gasket was replaced. The rear crankshaft oil seal and wear sleeve were replaced. (the main purpose of running in is to check whether the oil seal is still leaking) the cylinder head is removed.
The electronic injector has been removed or major adjustment has been made when it has not been removed. (the main purpose of running in is to check the power.)
Perform engine run in
Important: if the engine is equipped with a power take-off, the following regulations can be followed to run in on the power take-off shaft. In order to prevent damage to the power take-off gearbox, the time for applying full load to the power take-off shaft shall not exceed the following 10 minutes.
Use the dynamometer to perform the following initial run in steps. If necessary, under controllable operating conditions, the dynamometer can also be used to perform the initial running in of the engine.
Important: do not use John Deere plus-50 oil or oils meeting the performance levels of apicg4, API CF4, ACEA E3 or ACEA E2 during running in period of overhauled engine. This oil will prevent the engine from running in correctly after an overhaul.
Do not add oil until the oil level is below the add mark. John Deere oil should be used to replenish the oil consumed during running in.
Do not fill the level above the mesh pattern or the "full" mark. The oil level is acceptable at any position within the mesh pattern.
1. During the running in operation, use "John Deere running in oil" to fill the engine crankshaft to the correct level. The ambient temperature can be ignored when running in oil is used. This oil is formulated specifically to enhance the running in of John Deere diesel engines. Under normal conditions, if running in oil is used, the running in time shall not exceed 100 hours.
If John Deere engine running in oil is not available, diesel engine oil meeting API maintenance level CE or ACEA specification E1 can be used.
Important: during the initial run in period, check the oil pressure and coolant temperature regularly. The fuel, oil or coolant should also be checked for signs of leakage.
2. Start the engine, the load and speed shown in the table below and run according to the specified time.
3. After the initial run in, the engine should be allowed to run at 1500 rpm for 1-2 minutes without load, and then shut down.
4. If necessary, check and readjust the valve clearance. There is no need to re torque the cylinder head.
Note: during the first 20 hours, the engine should be avoided from idling for a long time or running at maximum load continuously. If the engine idles for more than 5 minutes, stop the engine.
Check the crankcase ventilation system
1. Check whether the ventilation of crankcase ventilation system is blocked. Insufficient ventilation will cause fouling in the crankcase. This can cause blockage of the oil passages, filters and oil nets, resulting in serious engine damage.
2. If the ventilation is blocked, clean the crankshaft vent pipe (a) with solvent and compressed air. Install and tighten hose clip.
A - crankcase vent pipe
Crankcase vent pipe
Check the air intake system
1. Replace the main filter element of air filter. If small holes are found on the main filter element, replace the auxiliary filter element.
2. Check the condition of intake hose. If the hose is broken, broken or in poor condition, replace the hose.
3. Check whether the hose clamp is tightened. Replace clips that cannot be properly tightened. This operation prevents dust from entering the air intake system, causing serious engine damage.
4. If the air filter is equipped with automatic dust remover valve (a), check whether the valve has dust accumulation or air intake is blocked.
5. Check the air intake obstruction indicator gauge (b) (if installed) to determine if the air filter needs to be repaired.
A - dust removal valve
B - air intake restriction indicator instrument
Check the exhaust system
1. Check whether the exhaust system has leakage or air intake is blocked. Check the manifold for cracks. Repair or replace as necessary.
2. Check that the turbocharger to exhaust bend adapter clamp is tight and there is no leakage.
3. Check whether the exhaust pipe leaks oil when passing through the valve stem sealing device. The leakage in the exhaust pipe may be caused by excessive valve stem to guide clearance or light engine idle load.
Check and maintain the cooling system
1. Remove the dust deposited in or around the radiator.
2. Visually inspect the whole cooling system and all components for leakage or damage. Repair or replace as necessary.
3. unload the foam filter on the drain hole beside the timing gear cover (A, shown as discharge) and discard the filter. Check whether the drain hole is blocked.
4. Insert a thick wire deeply into the drain hole to ensure that the drain hole is unobstructed.
5. install new foam filter flushing device with open hole.
6. Remove and check thermostat.
7. Drain and flush the cooling system.
Important: air must be removed from the cooling system when refilling the system. Loosen the temperature transfer unit connection at the rear of the cylinder head and plug the top front end of the cylinder head with a plug or plug the thermostat housing so that air can be discharged when filling the system. After draining the gas, re tighten the connection piece or plug.
8. Fill the cooling system with coolant. Follow the recommendations in Chapter 002.
9. Run the engine until the operating temperature is reached. Check the whole cooling system for leakage.
10. After the engine cools down, check the coolant level.
Note: the coolant level should be level with the bottom of the radiator filler neck
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