Does anyone here have the bosch 4000 table saw?If so have you had any problems w/the blade lifting mechanism?Mine had just recently started to have trouble lifting(it’s approx. 2 y/o),not bad but definately not like the ease of it’s usual operation.I keep it pretty clean underneath but blew it out anyway.It seemed to work fine for a while but the trouble came back and after trying to see what it might be I noticed some play between the gear on the threaded rod and the cast bracket on which it sits.
The threaded rod goes through the gear and the diameter is reduced and it goes through the bracket where it passes through a s/s washer and it’s last bit of lengh is threded w/2 nuts one used I imagine as a keeper.
The nuts where loose so I tried tightening them but it did not help the situation.Then I backed the nuts off a bit and tried again,no good.I tried pushing up on the motor while raising the blade and it went up,no problem.Couldn’t quite figure out why it had the play in the mechanism but left the blade up so I could finish cuting some 2x material.
Just then a friend happened by and after catching up a bit told him my tale of woe and decided to do what I was telling myself not to do..show him whats happening w/the t/s.Sooo,I go over everything and we have the saw on it’s side trying to figure whats what,trying this,that and the other thing and presto change-o.That sucker(gear on threaded rod)is now stuck fast,will not budge a bit.Niether w/ brute strength or blunt instruments.The saw is now farquat of course because it is stuck in the lowered positioin.At least the blade is safe for a while.
Any help from a bosch t/s owner or someone w/ a similar blade lift mechanism is much appreciated.Other than that trouble I really like this saw but I think there may be a design mistake in that mechanism or that another s/s washer should’ve but was not installed between the gear and the bracket itself.(the gear is some type of plastic or composit and it sits directly on the bracket).
Thanks for any help you may offer.