Tractors and agricultural vehicles are equipped with engines, air filter, oil filter, diesel filter, commonly known as "three filter". "Three" the work is good or bad, directly affect the working performance and service life of the engine. There are quite a number of drivers, not according to the time and the requirements of the specification of the "three filter" maintenance and maintenance, resulting in engine failure occurred frequently, prematurely into the maintenance period.
1. main points for maintenance of air filter. The air filter should pay attention to the following points in addition to the timely maintenance of the specified time and operation requirements of the instruction manual.
(1) the guide plate of air filter should be maintained without deformation and no rust. The inclination angle should be 30~45 degrees. If it is too small, the resistance will increase, which will affect the intake air. If the air flow is too large, the air flow will weaken and the dust separation ability will be reduced. No paint should be dropped on the surface of the blade to prevent oxidation particles from entering the cylinder. The direction of the dust outlet should be based on the ability to discharge the dust particles.
(2) to clean the ventilated mesh in the maintenance, the dust can not exceed 1 / 3 height for the dust collecting cup, otherwise it should be removed in time; the sealing of the dust cup should be tight, and the rubber seal should not be damaged or lost.
(3) fine filter the oil level of the standard, resulting in high oil into the cylinder and coke, too low to reduce the filtration effect, wear speed.
(4) metal mesh filter in the alternative (silk), the hole diameter of the wire or only slightly smaller, not increase nor reduce the loading amount, otherwise it will reduce the filtering effect.
(5) the intake pipe shall not have leakage phenomenon, the oil and smoke dust cleaning should be in place; to use high-pressure air blowing filter, in low humidity environment, blowing air into the opposite direction to the direction of the screen; when installed, the adjacent screen folding direction should be mutual cross.
2. main points of maintenance and maintenance of oil filter. The oil filter must be maintained in accordance with the specified time, and the following points should be paid attention to:
Centrifugal oil filter maintenance, centrifugal filter should pay special attention to and after installation:
(1) there should be no blocking phenomenon. The inspection method is, when the rotor is installed, the rotor is rotated with the hand, and after the release, the rotor can be free to turn 2-3 circles and stop, that is to be qualified.
Second, it can also install the fine filter on the vehicle, start the engine, run a few minutes at the rated speed, and extinguish when the oil temperature reaches 70 degrees, then listen to the rotor outside the housing, and it will continue to rotate for more than 1.5 minutes, that is, the installation is qualified. If the above index is not reached, it should be reassembled if the installation is not qualified.