I'd been using the chipper/shredder, shredding mostly oak leavesand pine needles, for about an hour, when I had to shut it off because it was not spitting anything out. I didn't see a rock or any other problem, so I went to start it again and the pull-start rope won't pull at all. It is encased so I can't see the rope, but it doesn't feel like it is tangled. It just won't pull at all. Any ideas? If there is a rock somewhere inside, jamming blades, would that prevent it from pulling, since you can't stop the blades from turning while it's running? I had started it about 3 times in that hour already.
This has happened several times for me and is usually caused by a peice of word jamed in the input hopper and half cut by the blades. Always make sure there is no wood in the input chute before stopping motor. remove the collector bag and use a long pry bar to reverse the flywheel. if this moves backwards you may then be able to remove the peice of wood jammed in the blades thru the input chute. Long Skinny arms is required to reach down the chute. Use a Flashlight to see if this is your problem.
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You say Pull rope mechanism is ok, How do you know that? Ive's seen them get the rope a little off and gets caught being wedged into a small clearance. Is the rope wearing? I bet if you take it apart put a new nylon rope and some wd-40 in rubbing surfaces including the ratchet area it will be good as new. Crank bearing has to get really bad to effect pull. How is the spark?
As for your first part - It sounds like there is something wrong with the switch lever that moves to complete the electrical circuit to start the shredder. On every shredder I have seen, there is a little "bellows" linked up to this lever that pushes it back so the machine will shut off. Most of the time all you have to do is put another piece of paper in and let that get shredded and the shredder will stop afterwards. If not, then just use the main switch to turn the shredder off.
Second, the beeping during "mid-shred" sounds like a warning that the shredder is starting to overheat and shut down. If this is the case, just wait a few minutes to allow it to cool down and try to finish the shredding you have. I have found that if you feed a shredder a constant stream of paper to shred, this might cause the shredder to overheat.
Also, the shredder may get overloaded with pieces of the shredded paper. Here is the way to check on that:
1. UNPLUG THE ELECTRICAL CORD FROM WHEREVER YOU HAVE IT PLUGGED IN.
2. Lift the shredder from the bin and turn it upside down.
3. Look for an excessive amount of paper in the bottom of the shredder. If there is a lot, you can remove it in several ways. (Most likely the bin is quite full at this point.) Pull the majority of it out and put it in the bin. If there are pieces of paper that you can pull out with your fingers, use a tool (needle-nose pliers, serrated tweezers, a hemostat, etc.) to get those difficult pieces out.
Replace the unit on the bin making sure that it is the same way you took it off. In most cases (on the better shredders), there is a notch on the underside of the shredder that needs to be on top of a "nub" that is on the edge of the inside top of the bin. Unless that nub is aligned with the slot, the shredder will not work.
Most of our industry refers to chippers or chipper-shredders as pieces of equipment that can handle both wood and leaves. These machines have both a chipping device and a leaf-shredding mechanism. This mechanism is basically a hammer mill, cylinder or drum with a series of pivoting flail-type knives. The chipper-shredder usually is a smaller machine and may include a vacuum to clean up leaves. These machines can be self-propelled or stationary. Most chippers are disc-type, consisting of a large, heavy, rotating disc with knives mounted to it and are for chipping wood only.