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Larger foreign matter is sandwiched between the inner wall of the pad and shoe mounting holes, and the moving surface of the pad will produce a bump, abnormal wear will start from the bumps when the shaft is running, but also extended to the periphery, causing the shaft and early bearing damage; if there are large foreign body between the movement of the bearing surface and the shaft after installation will be embedded in the bearing alloy layer, running at the same time damage the shaft also damage the bearing; its axis and tiles and mounting holes the parts are subject to touch knock the bump point will be on the axis and tile damage or injury.
The causes and prevention: the corrosion of the shaft, bearings, bearing hole (the body, connecting rod) generates oxide or sticky sediment should be carefully checked before installation cleaning, oil channel and tubing lumen; installation site must be kept away from dust dust and debris splash venue; installation tool to clean and take the necessary protective measures to avoid recontamination, and lubricants used in the assembly to clean dust mixed; shaft and bearing and the bearing hole storage and installation, to ensure that is not in contact with any metal objects without any touch knock operation.
To prevent the shaft and bearing lubrication system caused damage and injury must be done:
A, no manual lubrication equipment, the installation of the engine to the shaft and bearing sports watch topcoat using the same label cleaning and lubricating oil, engine installation, before initial startup turn off the fuel switch, driven by the engine with the starter idle several times, when the engine oil pressure gauge is displayed, then connected to the fuel switch, the throttle operation observed in the medium and low speed, start the engine.
The B engine after long-term storage, the initial startup is also subject to the startup drive the idling, and then start.
C, must be stipulated time of engine maintenance, inspection, oil change and filter.
D, engine lubricating oil level must be within the standard range, lubricants and refueling tools must be clean to prevent the entry of dirt and water, while ensuring that the sealing effect of the engine ministries.
E, avoid idling engine idle for too long, not more than 5 minutes.
F, after starting the engine must be medium-speed heating operation, when the water temperature rises above 70 ° C and then put into use.
G, the end of a long work at full capacity, the engine can not be shut down immediately, we must let the engine-load low speed turn after 15 minutes to stop, otherwise the heat inside on the loose out.
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