1 timely maintenance

When installing the bearing (W) should be first in the shaft and the bearing of the moving surface coated with provisions of brands of clean oil, the main bearing repair before initial start-up should first close the fuel switch, and the throttle is placed in a low position, start the engine operation observation, idle time can not exceed 5min. Do a good job in the new machine and overhaul of the engine after the running in period of time in a long period of time to prohibit the load surge, reduced and high-speed operation of the state work; long time full load work can not immediately stop. Must be unloaded, in the low speed operation after the 15min is shut down, otherwise, the internal heat can not be dispersed.

2 reasonable use

(1) as far as possible to avoid the engine at low speed and heavy load for a long time

Engine at low speed and heavy load conditions, the bearing will be in the boundary lubrication state, especially when the engine speed is reduced to the vibration point, due to the vibration wave of the role of direct contact between the metal may be great. For this purpose, the low speed and heavy load conditions should be limited to a minimum.

(2) to prevent the engine starting immediately after acceleration

Normal circumstances, there will be a certain amount of oil remaining in the bearing for engine idle speed and lubrication, however, if the engine speed is more than 1000r / min, you need to lubricating oil lubrication engine start requires at least 15~30s in lubrication system in the formation of oil pressure and oil flow, if started in the throttle wide open, 2S can reach the highest speed, which means that the bearing will in ten seconds in Unlubricated condition, and to run at a higher speed, so it is easy to cause damage to the bearings.

(3) regular inspection of lubricating oil, if necessary, add or replace

Method for replacement of lubricants: general is in after the engine flameout while heat the oil release, then add new oil, preferably in combination with oil lubrication system cleaning, make adding new lubricating oil for contaminated.

In the process of mechanical use, it should be timely to check the oil sump oil level height, to be added; also should regularly check the quality of lubricating oil, if necessary, to be replaced.

Check the quality of the lubricating oil can be empirically observed on the oil dipstick lubricating oil, in order to make a rough judgment, namely in check oil level height also on the quality of lubricating oil visually, the to determine if the lubricating oil should be replaced.

3 regular inspection and adjustment

No disassembly inspection, which is based on the experience of the instrument or sound auscultation. Bearing damage, the engine will be running when the sound of the bearing will be issued. Main bearing issue is a coarse hair boring "boring", higher engine speed, load the voice getting louder; in suddenly stepped on the gas when the noise is more prominent and even the engine will produce buffeting; when the alloy layer peeling, burning tile or clearance increases to a certain degree, in any speed or load, generally heard knocking; to determine which main bearing ring can be issued in accordance with the position of sound judgment, but also the suspected bearing and adjacent to the two cylinder off the fire, if the sound reduction that is the sound of the bearing.