原帖由： Subash ,
Firstly, thanks to lawrencesemenuk for encouragement and opinions. Thanks to mayer for listing the common possible causes. A you tube of bosch machine's tub bearing and rear bearing replacement was insightful of modern washer inside structures. Dear lawrencesemenuk, You are spot on correct stating that my tinkering induced the clanking sound problem. But what we may not have been able to guess was that the problem was because of one less SPRING WASHER - Amazing indeed. As a glimpse of the cause of the sound, I say that one less spring washer caused one screw to become loose and then the vibrations increased and this had a cascading effect of lossening other screws and further increasing the vibrations and setting of this vicious cycle that ultimately lead to scary sounds being heard outside. Since I have also guessed 'some' of the inside structure of the washer in todays explorations, that I will describe below, so I cannot vouch for it, nevertheless, I feel I have learnt something about the history of the front load washers in my adventures with my washer, as I call it adventure now instead of an ordeal! Also I learnt about some terminologies of the parts inside. Now you could be surprised that I learnt that the washers in the earlier days were very different in construction from what are contemporary. My washer, even though not much old, is based on an older type of construction. The washer has a stainless steel drum AS WELL AS A STAINLESS STEEL TUB! SECONDLY, there is a spider bolted OUTSIDE to the tub and there is a bearing INSIDE THIS SPIDER! And the drum is mounted into this bearing. Since, I did not (neither dared to nor needed to) disassemble the spider away from the tub I do not know maybe even in my old style washer there is a second bearing beyond this spider bearing (mounted perhaps inside the tub at its opening towards the spider or a bearing could be at the spider mouth facing the drum), but the spider bearing, on the outer side of the spider, is LARGE SIZED and not small sized like that of a modern washer's rear bearings Though I am not sure, but there is a STRONG POSSIBILITY that there is JUST ONE bearing in this machine - as opposed to the contemporary machines having tub bearing as well as a smaller rear bearing behind it (2 bearings in modern washers are supposed to keep the axis of drum shaft perpendicular to the plane of the bearing rotation). The reason that I feel that there could be just one bearing is that the pulley is mounted onto the drum shaft's end and there is a 'very heavy' washer between the pulley and this 'washer' connects to the inside ring of the bearing, taking an additional transverse support from the bearing - though in that case this could be producing a very high stress on the bearing! Anyway ignoring this debate of existence of one or two bearings, and coming to the cause of the clanking sound: The spider is bolted to the drum using six bolts - each should have been having one spring washer - incidentally, the company repair person who had changed the bearing earlier (as I alluded about it earlier) did not return the spring washer in one of the bolts. He tightened the bolt very hard (even bending the bolt's edges in that process). I did not use that much of torquage yesterday, since I did not know about this mischief, leading to this bolt getting loosened off. Now as the bolts started getting loose one after the other, the spider must have started getting losser on the bolts away from the tub and at high speed this must be creating the world class scariest clanking sound that would not have been heard by anywhere else - exaggerating :) . Dear mayer, though you rightly think that the bearing should be replaced as I had said there was grinding sound heard earlier. Maybe it was past midnight when I wrote my question and maybe I was more scared about the grinding noise and it could be just squeaking sound and the grease slipping past the rubber seal was all that was needed! Secondly, the company is no more supporting the parts of this model - and though today is sunday and I could not enquire about it, I feel they can refuse replacing the bearing citing no more support! I did not carefully go through alibaba because at a glancing superficial look most results are coming for bulk orders. Though I saw single order bearing available from the mainland China - but to me there does not seem to be a simple way through which I can find out that these bearings are for my model. Thank you nevertheless for overall quite insightful suggestions and opinions.