My brother-in-law is developmentally disabled. He seems fond of using the chipper. I would not feel comfortable letting him operate the machine without this safety feature.
SOURCE: Chippers and Shredders safety tips
Make sure that the machine has come to a complete stop before removing access panels. When performing maintenance on the machine, shut off the engine, remove the key (if electric start) or temporarily disable the machine. Always feed material butt-end first. Feed shorter material into the machine by laying it on top of longer material. Do not feed material that you've raked up or scraped off the ground. You should simply place this material on top of the material that you've already chipped, as it may contain dirt and rocks that may damage the chipper. Chippers with dull knives and anvils do not feed well. This becomes a problem with any machine but especially on manual-feed units. If your operator then tries to force the material into the feed shoot, he or she creates a greater danger of slipping and getting too close to the chipper knives. Do not operate the chipper alone. Always be prepared for a fire or injury by having a fire extinguisher attached to the machine and a first-aid kit handy. It is the operator's responsibility to make sure that flying chips and debris will not harm bystanders.
SOURCE: Troy-bilt Model 47279
I really hate to be the "bearer of bad tidings" but Troy Bilt, as a company, in no longer in business, MTD bought out the name and design rights for a lot of their tools but they are not manufacturing or stocking any parts for the older GardenWay/ Troy-Bilt machinees. My best suggestion would be tostart looking for a good used one or one with a blown engine, broken frame or whatever, buy it and canibalize it for spare parts
SOURCE: I have a yard machinne 6.5hp chipper/shredder -
The blade(s) should have usually two bolts on them depending how many blades you have. Mine only has one blade held on with two bolts and that is only on the side that cuts the larger branches up to two inches in diameter and should be sharpened on a grinding wheel because it has a specific angle to it. The other side that chips smaller branches and twigs it a type of flailer, meaning pieces of metal just swinging around to mash up the sticks and do not need sharpening.
SOURCE: How to sharpen blades on a Yard Machine 6.5 chipper
http://manuals.mtdproducts.com/mtd/public/list.jsp?BrandCode=10151
above link will provide a pdf of manual
I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae
SOURCE: replace flails on 5.5 Yard Machine
Go to www.ordertree.com. The flailblade is p/n 719-0329, The shredder blade is p/n 942-0571, The chipper blade is p/n 981-0490.
Replace them you have to take casing off the unit to get to them.
Testimonial: "I have the casing off,and have penitrating oil on the pins and screws ----- tomorrow is an other day!"
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