tomh Posted July 13, 2008 Posted July 13, 2008 My neighbor rebuilt the bevel gear box several months ago and then gave the tractor to me after after a couple of other problems including severe surging. Another member correctly suggested that this was caused by loose bolts. In fact, I had to tighten them again after about an hour of use. The new issue is that after running very well for about another hour, the engine now turns over too slowly to start and there is a noise that sounds like a slipping belt or scraping metal. When I turn the engine over by hand, the scraping sound occurs only at one point in a revolution. I tightened the belt, that was not the problem. I also removed the drive shaft and the engine started and ran easily with no noise. The bevel gear oil level appears to be ok. Does this sound like a bevel gear problem again, or can you suggest other possibilities? Thanks for sharing your thoughts and knowledge.
RayS Posted July 13, 2008 Posted July 13, 2008 It sounds to me that your flywheel pulley is rubbing the shroud.
Roy Posted July 14, 2008 Posted July 14, 2008 "the engine started and ran easily with no noise." If above is true, the problem must be in the drive shaft, couplings, and/or BGB. Check the rear drive shaft coupling and yoke on the BGB. Also check the BGB shafts for play/slop and the BGB output pulleys. Let us know what you find.
JJ MARSHALL Posted July 14, 2008 Posted July 14, 2008 check the cooling fan for the hydo if this is a vicker hydo. JJ
gearhead19 Posted July 14, 2008 Posted July 14, 2008 You might try disconnecting the hydro drive belt to see if it is the BGB, or the hydro producing the noise..
tomh Posted July 15, 2008 Author Posted July 15, 2008 Thanks for those responses. I hope to get some time tomorrow to check out your suggestions. Will let you know what I find.
tomh Posted July 16, 2008 Author Posted July 16, 2008 After disconnecting the hydro belt, the noise appeared to be coming from the bgb. I engaged the pto and the noise stopped, and the tractor started and ran ok. I had removed the right side pulley to tighten bolts and I suspect that I did not leave enough play when I replaced it. The shaft seems to move from side to side a little when the pto is moved between engaged and disengaged. I will move the pulley away from the end plate a little and see if will then work ok in the disengaged position. Before I had this problem, there was a space between the right side pulley and end plate of about 1/4" or so which closed when the pto was disengaged. Does this sound right, or do you have other suggestions? Thanks for your help so far.
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