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#31
August 4th 16, 11:40 PM
posted to rec.aviation.soaring
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Al-Ko Trailer Tongue failure
Thanks for posting this Dave.
Finding bolts with the right unthreaded length wasn't easy. Just replaced the 8-year-old 10.9 grade bolts with AN8-36A and AN365-820A from Aircraft Spruce. $20 with spares and shipping. AN8-37A bolts would work too. The unthreaded part is long enough and the threaded part comes to the top of the Nylock when using locknuts. Torqued to 45Lb. Does that seem right? The old bolts didn't look bad. A little corroded, but still tight. The threaded part was not damaged but too long. The unthreaded part was too short for the job. Do this at home! Chock the trailer. Jack up the tongue aft of the bolted connection. Release the parking brake. 19mm fits metric and STD. Loosen both. Change one at a time, and don't tighten until it's reassembled as the AN8 bolts are a snug fit. Jim 
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