1. What method is used to directly adjust the valve clearance of various engines? Now we have a disassembled engine, but the adjustment requires special tools and adjustment according to the crankshaft mark;
Answer: To adjust the valve clearance of various engines, you can use the Cummins Cylinder Block to adjust.
6-cylinder engine, ignition order 153624.
Cylinder method, adjust the valve of cylinder 1, and observe the first time when the exhaust valve of cylinder 6 rises and the intake valve falls. At this time, cylinder 1 will ignite.
Adjust the valve of cylinder 5, and observe the first time when the exhaust valve of cylinder 2 rises and the intake valve falls. At this time, cylinder 5 will ignite.
Adjust the valve of cylinder 3, and observe the first time when the exhaust valve of cylinder 4 rises and the intake valve falls. At this time, cylinder 3 will ignite.
The same goes for the last three cylinders.
This method can be used for general engines, but for Cummins NT855-280, NT855-C360 and other series engines, the valve and injector must be adjusted together.
I don't know what model of engine you disassembled, if it is NT855 series. The torque method can be used. A-1-6 B-2-5 C-3-4 Injector torque <8.1 Nm>. Valve clearance (0.36-0.69) After adjusting the injector of one cylinder by the torque method, adjust the valve of the same cylinder. (It is not allowed to adjust the valve first and then the injector).
2. What kind of special tools are needed to repair the engine
Answer; Required special tools. Lifting fixture. Start-up and repair bench. Engine bench joint. Mechanical timing adjustment mechanism fixture. Bracket and stud. Engine bracket. Pulley drawing die. Fan hub wrench. Crankshaft flange drawing die. Cylinder liner drawing die. Injector drawing die. Piston assembly tool. Injection timing inspection tool. Injection stroke adjustment tool. Torque wrench. Etc.
3. How to adjust the inlet and outlet pressure of the torque converter, and what is the basis?
Answer: To adjust the inlet and outlet pressures of the torque converter, you can adjust the force of the springs in the torque converter boost valve and back pressure valve.
4. The hydraulic oil of the transaxle assembly is very easy to heat up at high temperature. If the temperature exceeds 100 degrees, the oil will lose its own characteristics and become thinner at high temperature. How to determine the cause of powerlessness: For example, because the gearbox pressure is low, the clutch is worn early or the engine is weak, how to determine the degree of wear of the Clutch Friction Plates, without disassembling other friction plates
Answer: Use the elimination method to determine, check the reason for the high oil temperature, whether it is due to the blockage of the return oil circuit of the torque converter, insufficient oil inlet pressure, or problems with the pump, vortex, and guide, and the brake belt is too tight, etc., to be eliminated one by one.
To determine powerlessness, the gearbox pressure is low, measure whether the pressure of the gear pump is normal. Measure whether the working pressure of each gear of the gearbox is normal. The gearbox pressure is low, and the pressure can be increased by adjusting the spring in the valve.
Early wear of the clutch, check whether there is alloy copper foam in the engine oil and filter element. If the steering clutch is worn, there will be obvious steering inefficiency.
The engine is weak, check the diesel filter, air filter, and observe whether the exhaust is normal. Eliminate them one by one.
To determine the degree of wear of the friction plate, the wear degree of the Gearbox Clutch Friction Discs must be measured by removing the friction plate, and there is a wear limit. If it is the friction plate of the steering clutch, there is no need to remove other friction plates. Remove the clutch and measure the size between the clutch pressure plate and the inner gear drum to determine the degree of wear of the friction plate.
5. In order to improve the efficiency of the working device, can the working pressure be increased? If so, what should be done? When the Cutting Edges touch the ground, why can't the ripper lift the bulldozer? Is it a pressure limit or a special structure? How to diagnose the specific data of the hydraulic system, where are they distributed, and how to measure them. What is the data? Can it be achieved that the tilt blade cylinder works at the same time when the blade is in a floating state? Can the working speed of the tilt blade cylinder be increased? Why is the brake belt very easy to wear? For us, it takes at least 50 hours! Sometimes there is no steering before the transmission oil becomes hot.
Answer: To improve the efficiency of the working device, the working pressure cannot be increased. If the working pressure is low, you can make appropriate adjustments.
When the blade touches the ground, the ripper cannot lift the bulldozer. This is normal because the lever arm is short.
What are the specific data of the diagnostic hydraulic system, where are they distributed, and how to measure them? What are the data?
The pressure measuring point of the hydraulic system is at the oil outlet of the hydraulic pump. It can be measured with the measuring tool that comes with the vehicle. The data is that SD22 is 14MPA. The measurement method is to push the blade down with force, and the pressure measured when the bulldozer reaches full load is 14MPA.
Can it be achieved that the tilting blade cylinder works at the same time when the blade is in a floating state. Can the working speed of the tilting blade cylinder be increased?
The tilting blade cylinder can work when the blade is in a floating state, but the blade has already floated and the oil pressure of the lifting cylinder has leaked away. How much is the meaning of using tilt? The working speed of the tilting blade cylinder cannot be increased.
Why is the brake belt very easy to wear? For us, it takes at least 50 hours! Sometimes there is no steering before the transmission oil becomes hot.
The brake belt is easy to wear. Have you adjusted it according to the adjustment data and adjustment position specified in the manual? The driver's operation also has a great relationship with the wear of the brake belt.
, Before the transmission oil becomes hot, sometimes there is no steering. This phenomenon is that the brake belt is loose and needs to be adjusted. It is not a problem of oil temperature. Because the higher the oil temperature, the more difficult it is for the pump to absorb oil.,
Engine Spare Parts
Engine Spare Parts,Diesel Fuel Injector,Cummins Cylinder Block,Engine Upper Gasket Kit
