The first trick
The temperature of the diesel engine is high. After the thermometer is removed, the small round hole under the thermometer seat is sealed with a wood plug to avoid boiling water circulation.
No. 2
The minimum core in the pilot handle plays a key role in micro-operation.
3rd trick
Some locations are often blocked. Check whether the transfer road is caused by internal peeling.
4th trick
The spring of the regulator stem is thinner in the middle than thicker on the outside,
It should be at the end of the posture stroke arrangement to adjust the stroke arrangement, and the middle waterproof casing restricts the valve stem stroke arrangement.
No. 5
Approximate resolution of iron cutting position:
1. The glow is caused by the hydraulic cylinder, and there is no dullness due to the low gear.
2. The fouling is caused by the pump or the needle roller bearing of the motor, and it is dull and dull due to high-speed operation.
No. 6
A certain posture is slow or not moving in a coordinated posture. The pilot secondary pressure is less than 20KG.
Reason: when the handle frame seal was removed and replaced, the small core on the lower side fell below, not in the hole of the valve stem, replaced it with a long, thick thin iron wire on the spot, and the test operation was OK.
No. 7
The lack of energy to move around. For a car parked near the sea for a long time, the chain rail shaft will rust to death, resulting in high frictional resistance and fatigue.
Countermeasure: dismantle and replace the chain rail shaft.
No. 8
Increased handle:
1. Reason: The oil return of the handle return pipe is blocked. Solution: Dismantle and replace the oil pipeline.
2. Reason: a small round hole in the pilot control valve core of the handle of the posture is blocked.
3. After cleaning up, take it down.
Tip 9
The exhaust pipe emits black smoke: oil head, gasoline pump, turbocharger (including intercooler, pipeline), air filter element, and hydraulic oil pump load.
Tip 10
After the pump is installed, you can pour gasoline at the top of the mouth to test for leaks. If it leaks, search for the cause. Whether the valve plate is reversed, the clamping force is insufficient, the matching surface between the engine block and the plate, and the plate and the chemical intermediate is not good, etc.
11th trick
Gear oil temperature: The oil temperature in the car's fuel tank should not exceed 90 degrees (old cars), and within 80 degrees for new cars.
12th trick
When the hydraulic oil pump is repaired, it is best to mark the engine block and plunger pump after being removed. When reinstalling, follow the order of removal to prevent poor friction of the coupler and cause excessive internal leakage.
13th move
The key elements of high gear oil temperature:
1. Leak
2. Throttle valve
3. Heat pipe cooling
Tip 14
If the hydraulic oil tank cap is damaged, the pressure cannot be maintained, which will cause no back pressure in the automobile oil tank, no pressure in the oil suction hole of the pump, and expansion of the friction resistance of the oil inlet. The pump is easy to suck in gas, which causes the pump to be damaged prematurely.
15th move
The exhaust pipe emits black smoke when fully loaded: the main pressure of the rear arm is generally 110-120Kg when fully loaded. If the pressure is too high, it should be considered that the friction resistance of the return oil is too large.
reason:
1. The valve stem of the regulator is installed incorrectly.
2. The back pressure of the oil return is too high. Check whether the product is stuck or the oil return filter is blocked.
16th move
About holding the car:
1. If the exhaust pipe emits a lot of black smoke when the diesel engine is under load, and the speed ratio of the diesel engine is relatively serious, the hydraulic oil pump will digest and absorb the output power to exceed the engine displacement. If the engine displacement is lowered a little, the car will be stopped. Turning better is a problem for hydraulic presses.
2. The engine displacement is not enough. Check the fuel pipe, air filter element, supercharger pressure, and fuel supply interruption, which may cause the accident to happen early.
It is very important to identify the second mobile phone when you buy it. The nationwide service system of the second phone and the powerful butler service team of the second phone will investigate and verify the information content of all the machines and equipment on the service platform to ensure that it is authentic and credible. , If necessary, you must be able to accompany you to see the car on the spot to prevent being deceived.
Tip 17
Heavy handle:
1. The pilot pressure is low and the oil inlet filter is blocked.
2. The oil return pipe of the handle is blocked from the vehicle fuel tank, resulting in excessive frictional resistance of the oil return.
The 18th move
The whole vehicle has no posture after changing the gear oil three times:
Reason: The dismantled oil reflects the original oil, 7 valve stems are dead, and the pilot lock relay is stuck.
Solution: Remove the regulators, relays, etc. and use a soft toothbrush to completely clean the valve stems, cores, etc.
Tip 19
When converting the pump and motor drive gears, mark the mesh with the transmission gear and the mesh between the shaft and the internal teeth of the transmission gear before removing it. Make sure that the assembly line is in accordance with the meshing scratches during the assembly line to avoid new ones. Caused by meshing noise.
20th trick
If the surface of the pump swash plate and drift plate of a small excavator are uneven, they can be milled on a CNC lathe with a cutter to eat them all, and then polished to a bright surface with a pump, then installed with a thickened drift plate, otherwise, the plunger The pump will be wrong.
