First of all, we need to know that for a piece of equipment, the engine is like its heart. If there is a problem with the engine, the entire equipment will not be able to operate normally. In addition, the economy, power, and environmental protection of the whole machine are directly related to the engine, so it is very important for a piece of equipment to have a good engine. In a piece of equipment, the engine is the most complex component, and its manufacturing cost may account for 20%-30% of the entire equipment, so the technology of assembling an engine is very high-end and rigorous.
1）Preparation:
The assembly precision of the CUMMINS engine is very high. Before assembly, the selected parts and assemblies must be carefully rinsed, blown dry, and wiped to ensure cleanliness. Check each part to ensure that there are no burrs or scratches. Keep the tools, facilities, and workplaces clean, and the workbenches and machine tools neatly arranged. In particular, check, rinse, and blow clean carefully.
2）Appearance inspection:
Check the appearance of the CUMMINS engine accessories to check for wear, cracks, deformation, etc.
3)Cleaning and oiling:
Clean the engine parts with a special detergent; apply appropriate lubricants when necessary.
4)Pre-install parts:
Pre-install required parts, such as cylinder head, piston ring, rocker arm, cylinder liner, etc.
5)Install the cylinder block:
Use appropriate tools to install the cylinder block to the base.
6)Install the crankshaft and connecting rod:
Install the crankshaft and connecting rod, and calibrate them to ensure that all parts are accurately aligned and well sealed.
7)Install the piston and valve cover:
Install the piston and valve cover to ensure that each piston is in the correct position.
8)Install the cylinder head and valve:
Install the cylinder head and tighten the screws; install the intake and exhaust valves and pressure relief valves in appropriate positions
9)Install the intake and exhaust system:
Install the intake and exhaust system to ensure that it is tightly connected to the CUMMINS engine components and ensure smooth gas circulation.
10)Install the oil /Fuel pumps and oil pan:
The installation of the oil pump and oil pan needs to ensure the normal operation of the lubrication system.
11)Install various other accessories:
Including various sensors, cooling systems, air filters, etc., to ensure the normal operation of various engine systems.
12)Engine performance test:
including power, speed, fuel consumption, torque, etc., to ensure that the engine meets the production standards specified by the CUMMINS factory.
Matters that need to be paid attention to during the assembly process include:
1) Cleaning parts and tools:
Before assembly, parts, tools and workbenches must be carefully cleaned, especially the lubricating oil passages of the cylinder block, to ensure that they are clean and free of impurities.
2) Apply lubricating oil:
to ensure lubrication of each component when it starts to move.
3)Tighten the bolts according to the specified torque:
The bolts and nuts on the CUMMINS engine must be tightened in sequence according to the specified torque to ensure that each component is firmly fixed.
4)Check the fit clearance:
The fit clearance between the piston and the block, crankshaft, camshaft, bearing and other main working parts must meet the standard requirements.
5)Ensure sealing:
All sealing parts must be well sealed, and there must be no oil leakage, water leakage or air leakage.
Through the above steps and precautions, the assembly of the CUMMINS engine can be ensured to proceed smoothly, and its normal operation and service life can be ensured.
