The "motorcycle bearing" protection method makes it look new

Source: Bearing network time: 2013-10-24

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After the motorcycle engine is differentiated; firstly, the degree of yaw of the crankshaft should be checked: the crankshaft is supported by the V-ring; the yaw degree is measured by the dial gauge; the operating limit of the yaw of the crankshaft is 0. 05 mm; The limit of use. Excessive yaw of the crankshaft is usually the main cause of abnormal engine oscillation; this oscillation will shorten the engine life; reduce the operating time. Therefore, once the operating limit is exceeded, the repair part will be corrected or replaced immediately.
Secondly, check the motorcycle bearings: check the front end; first remove the bearing with the solvent to remove the bearing; and smooth with the oil. Then change the inner seat to see if the transition is smooth; if the transition is found to be insensitive and uneven; The impact of "Kada, Kada"; further look at the ball track and steel ball. If the steel ball and the seat are found to have severe pitting, peeling, breaking, etc., it is necessary to replace the new bearing. If the bearing changes very much Normal and smooth; there is no obstruction of the appearance; but the noise of â€œå“—å“—â€ is very large; it is necessary to check whether it can show the appearance of excessive wear. The method of viewing is: hold the inner and outer rings tightly with both hands; push the bearing forward and backward; The gap that feels shaking is very large; it is necessary to replace the new bearing. Then we need to check the oil seal of the bearing; if the appearance of wear, breakage, and hardening is found; such oil seal damage may cause leakage of fuel and air mixture or oil. The oil seal should be replaced immediately.
Again, look at the big-head bearing of the motorcycle connecting rod: view the time; change the crankshaft with the connecting rod; should be able to feel the rotation in the big head change smoothly. Then firmly fix the crankshaft on one side; pull the connecting rod on one side; Acknowledge whether the sound can be expressed in the big head. The degree of wear of the big end of the connecting rod can be estimated by looking at the swing of the small end of the connecting rod; this method can also see the degree of wear of the large part of the connecting rod. The degree of wear cannot exceed 3. 0mm; Wear exceeds this limit; the connecting rod, crank pin and crank pin bearing are all repaired or replaced.

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