Honda Harmony Il mower transmission fix
I bought a used Honda Harmony ll self propelled mower, HRR216SDA, for my son for $50. The seller told me that the drive cable was bad or it needed adjusting to fix the non-operational self propel drive. The mower runs and looks great so it was worth $50 even if that function ever worked. Online there is really no information on the drive transmission, (a Spicer 6200), other than price for a new/used one which costs $100 to more than $200. I was unable to find any information on what actually breaks on these single speed transmissions or a tear down of one, so I was on my own. After removing a couple of under carriage shields to access the drive transmission, I observed that there wasn't any resistance from the gearbox when I manually moved the engagement lever, (on the transmission), and rotating the rear wheels. There should be some feel of engagement/resistance but it was like whatever the lever was connected to was broken. So with nothing to loose I dug into disassembling the transmission gearbox and this is what I found, (I hope this makes sense). The engagement lever is connected to a shaft that runs the length of the gearbox inside. This shaft assembly has two parallel arms welded to it that spans across a very thick gear, (smooth on the arm side and teeth on the opposite). Both arms have a hardened steel pin protruding toward and riding on top of the smooth edge of the gear. Normally when the lever is moved, it rotates the shaft arms causing the steel pins to press and laterally move the spinning gear, (via a drive belt from the engine), to engage with an adjacent parallel toothed gear that is part of the rear wheel axle and the rear wheels spin. Both of the two steel pins where sheared off of the arms, (see pic), which explains why there was no resistance when moving the engagement lever. I punched out the remaining halves of the pins from the arms and found the diameter at 3/16" with a drill gage. I drilled the holes to that size, tapped and screwed in two 3/16" hardened hex bolts, (the threads rest on the smooth gear). I did have to grind the bolts length down to match the original pins length, (pic shown is before I ground them), and file the threads down smooth where it mates the gear. Once I put it all together the transmission worked great! I paid $1.25 for 4 3/16" hex bolts and another $6 for a tap. Tools I used: rachet and sockets, box end wrenches, star tip driver, drill, grinder, hand file, axle grease and Loctite blue thread locker. Thanks for reading!
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from DIY https://ift.tt/3eFSFkS
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