Regarding Isuzu engines, it is believed that all those within the automotive industry possess a thorough understanding. Through its excellent performance, robust quality, and other attributes, it has earned worldwide recognition. However, even the most reliable quality requires correct operation by personnel and regular maintenance.
Particularly for engines in construction machinery, facing harsh working environments and extremely high operational demands, safety in usage demands even greater attention.
Today, we shall discuss the safe operation of Isuzu excavator engines.
1.For a new engine, the first step is to conduct a new engine verification. Unpack the shipping crate, locate the packing list, and verify that all components are present.
Inspect whether the engine’s inlet/outlet water ports, inlet/exhaust ports, and inlet/return oil ports are all sealed;
Remove the waterproof film and check whether the engine contains the assembly ticket, certificate of conformity, and desiccant.
On the valve cover, check whether an engine nameplate is affixed, displaying the engine model, date of manufacture, manufacturer, and country of origin.
2. Turbocharger Inspection
After confirming the new unit is undamaged, remove the adhesive tape from the turbocharger. Inspect the rotor for damage, check the casing for signs of friction, and verify there are no oil leaks. Manually assess whether the axial/radial clearance of the rotor is abnormal.
3. Fill the oil filter with engine oil
Remove the sealing tape from the oil filter, then pour engine oil into the inlet until full. Refit onto the frame. Note: Ensure the oil inlet is not mistaken for the outlet!
When performing maintenance and changing the engine oil, ensure the oil filter is also filled to capacity. Failure to do so may result in abnormal wear of components such as the turbocharger, cylinder assembly, camshaft, and bearing shells.
4. Cylinder Pressure Test
Refer to the engine manual for the specific model to confirm measurement conditions. Disconnect the high-pressure fuel pump supply during testing. The optimal measurement point is at the glow plug location; ensure all glow plugs are removed.
5. Inspection of the Fuel Transfer Pump
During normal engine operation, the manual component of the fuel transfer pump does not participate in pumping fuel; it is the plunger connected to the high-pressure fuel pump that constitutes the actual pumping mechanism. The manual fuel pump features a sealing gasket at its top, thereby preventing air ingress. Should air be detected within the low-pressure diesel fuel line, thorough examination should focus on the fuel lines, fittings, and the fuel filter.
6. Inspection of the Radiator Pressure Cap
Due to the varying quality of antifreeze, the vacuum valve on the radiator pressure cap may occasionally become stuck. This prevents coolant from the expansion tank from flowing back to replenish the system. Over time, this leads to a gradual depletion of coolant in the radiator, potentially causing the engine to overheat.
7. Operational Precautions
Insert the ignition key and turn it to the ON position. The red oil pressure warning light should now flash. Turn the key to the START position to ignite the engine. Within 5 seconds, the red oil pressure warning light must cease flashing. Should it fail to do so, the vehicle must be stopped immediately for inspection! Should the engine fail to start initially, wait one minute before attempting again to prevent damage to the starter motor. After starting, allow the engine to idle for 5–10 minutes to ensure thorough lubrication during warm-up. Avoid sudden acceleration or heavy loading, particularly in cold weather. Similarly, allow the engine to idle for 5–10 minutes before shutdown to permit the turbocharger to decelerate gradually. Failure to do so may cause rotor wear, compromise dynamic balance, and ultimately result in shaft fracture or seal failure.
8. Using a Digital Multimeter
Occasionally, instances of welding on excavators may be observed in factories. It is imperative to disconnect the positive and negative battery cables before commencing any welding work. Failure to do so may result in damage to the generator’s rectifier, electronic regulator, or other electronic components. As illustrated below, a digital multimeter must be used correctly to measure sensors or other electrical components.
The above constitutes our company’s -EnginePartsGlobal recommendations for the maintenance of construction machinery engines, using Isuzu engines as an example. Should your engine require replacement parts, please do not hesitate to contact us.
We primarily supply the following engine parts:
1.Core Engine Components
Cylinder blocks, cylinder heads, crankshafts, camshafts, pistons, piston rings, cylinder liners, connecting rods, and bearing shells. These components form the engine’s “heart” and demand exceptional durability.
2.Fuel and Injection Systems
High-pressure fuel pumps, injectors, fuel filters, common rail pipes. Ensure efficient and clean fuel combustion, directly impacting engine power and emissions.
3.Intake and Exhaust Systems
Turbochargers, intercoolers, intake/exhaust manifolds, mufflers. Manage the engine’s “breathing,” affecting air intake efficiency and exhaust expulsion.
4.Cooling and Lubrication System
Water pump, radiator, thermostat, oil pump, oil cooler. Ensures the engine operates at optimal temperatures while lubricating moving components.
5.Electrical and Control System
Starter motor, alternator, battery, various sensors (e.g., coolant temperature, oil pressure sensors), ECU (Engine Control Unit). Functioning as the engine’s “nervous system” and “control switches,” they manage starting, power generation, and precise operation.
6.Other Auxiliary and Wear Components
Various filters (air, oil, fuel), gaskets, belts, bearings. Though small, these are critical and require regular replacement and maintenance.
Feel free to contact us anytime via WhatsApp/WeChat +86 19181745421 or email
contact@engineparts-global.com.
