(1) heating temperature should be well controlled, high temperature bearings will be damaged ferrule amount of expansion, the temperature is too low, the effect was not significant. The amount of thermal expansion of the inner ring inner diameter of 80 to 1000 ° C. The heating temperature is obtained, which for the bearing having the general amount of interference, is already sufficient.
② Upon reaching the required heating temperature, it is necessary as soon as possible the installation, to avoid cooling the difficulty of installation.
(3) bearing cooling in the width direction of contraction, so the installation to put some pressure on the inner ring is pressed to the shoulder, and after cooling with a very thin feeler test for detection of the end face of the inner ring and the shaft shoulder between the gap. In short, the butterfly for proficiency required, quickly and accurately.
(1) decomposition, cleaning the crankshaft assembly to ensure that the crankshaft of the internal oil passages are clean and smooth.
(2) on the crankshaft inspection, if any crack and must be replaced. Carefully check the crankshaft main journal, rod journal and its transition arc, all surfaces without scratches, burns and touch marks.
(3) Check the crankshaft main and rod journal dimension overrun by the repair level to be repaired. The crankshaft journal repair will be allowed as follows:
(4) Check the crankshaft journal and rod journal hardness requirements must meet the technical requirements. Otherwise, it should be re-treated, in order to meet the use requirements.
(5) The crankshaft radial round beating, the thrust face the common axis of the spindle neck runout, must comply with the technical requirements. Otherwise, you must be corrected.
(6) axis of the crankpin, parallel to the common axis of the spindle neck in the entire length must comply with the technical requirements.
(7) the crankshaft before and after transmission gear for cracks, damage, badly worn, replace the crankshaft.
(8) any crack, crank weight bolt must be replaced. Crankshaft replacement balance weight or balance block bolts, the crank assembly balancing test, to meet the technical requirements to ensure that the amount of unbalance.
(9) flywheel, pulley bolt if any cracks, scratches or elongation exceeds the limit, replace it.
(10) carefully check the crankcase foot shock absorbers, if damaged, rubber aging, cracking, deformation or crack and must be replaced.
(11), pay attention to the main bearing crankshaft assembly, thrust tile installation. Check the crankshaft axial clearance as required Tighten the main bearing cap vertical bolt and horizontal bolts.
Bearing equipment periodic maintenance, operation and external parts Change dismantled bearing abort check the demand in turn determine the bearing parts whether can use again and record the use of conditions better than bad. In order to clarify and query visit the remaining amount of lubricant sampling Next to the well to clean the bearings.
inside and outside the ring, rolling elements, the confrontation between the frame and one any cracks and rendering debris.
inner and outer rings, rolling a a peel.
C raceway, wall, rolling significantly cards injury.
d confrontation frame badly worn or loose rivets ferocious.
e. raceway, rolling rust and injuries.
f rolling surface, rolling a significant indentation and hit marks.
g Inner diameter surface or outer diameter creep.
h overheating discoloration ferocious.
i grease sealed bearings, seals and dust cover damage to serious.
 



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