Re: 646-75lbh Restoration
Posted: Mon Mar 27, 2023 10:07 pm
Sep 20, 2022
The engine has been dropped of at a machine shop for boring and a wish list sent to Boomer. In the meantime the hoe will get some attention. After reading Harry's post of issues with his bucket not curling, it was the motivation and encouragement needed to give the hoe a proper rebuild. The 646L hydraulic system was used to stretch out the hoe for pressure washing and joint pin removal. The center pin was seized and took a lot of persuasion to remove. At one point consideration was given to drilling and tapping the pin for using a hollow core cylinder to pull the pin out.
2 items added by a PO were found after removing the center pin. A 2X4 block was wedged under the 4 hard lines and a clamp made of steel had been used to support??? the lines. The clamp bolts were bent over and nuts damaged beyond turning. Because the bolts were tapped into the frame they turned out of it easily. Time has not been taken to see if there is a proper pipe clamp that is missing from the joint area. The 2 long cylinders came apart much easier than expected. The Davis manual says the the gland nut is torqued to 200 ft/lb's. The end caps were not much more than hand tight and the gland nuts broke loose with a cheater. There was quite a bit of filth inside the cylinders, probably 45 years worth. The 646L was used for testing the hoe so it will definitely need an oil and filter change before doing any work. The gland guide on on barrel has a lot of gall marks. The barrel is also scored. The barrel will hone but no decision has been made on whether to reuse or make a new rod end. The crushed hard lines were taken to a local hydraulic shop and duplicated with a 24 hour turnaround. The price was roughly 3 times the price of a same length hose. Still digging in,
Eugene
The engine has been dropped of at a machine shop for boring and a wish list sent to Boomer. In the meantime the hoe will get some attention. After reading Harry's post of issues with his bucket not curling, it was the motivation and encouragement needed to give the hoe a proper rebuild. The 646L hydraulic system was used to stretch out the hoe for pressure washing and joint pin removal. The center pin was seized and took a lot of persuasion to remove. At one point consideration was given to drilling and tapping the pin for using a hollow core cylinder to pull the pin out.
2 items added by a PO were found after removing the center pin. A 2X4 block was wedged under the 4 hard lines and a clamp made of steel had been used to support??? the lines. The clamp bolts were bent over and nuts damaged beyond turning. Because the bolts were tapped into the frame they turned out of it easily. Time has not been taken to see if there is a proper pipe clamp that is missing from the joint area. The 2 long cylinders came apart much easier than expected. The Davis manual says the the gland nut is torqued to 200 ft/lb's. The end caps were not much more than hand tight and the gland nuts broke loose with a cheater. There was quite a bit of filth inside the cylinders, probably 45 years worth. The 646L was used for testing the hoe so it will definitely need an oil and filter change before doing any work. The gland guide on on barrel has a lot of gall marks. The barrel is also scored. The barrel will hone but no decision has been made on whether to reuse or make a new rod end. The crushed hard lines were taken to a local hydraulic shop and duplicated with a 24 hour turnaround. The price was roughly 3 times the price of a same length hose. Still digging in,
Eugene