Backhoe Bushing Replacement DIY

[@GerardVaux]

Hello, Loved your video. Lots of good learning for myself. I just replaced all the seals in my swing cylinders on my JD 510C. While doing so, I capped both oil supplies to the swing cylinders and was able to run the backhoe to lift up the hoe and swing it off out of the way to repair one cylinder at the time. I manually swung the hoe itself manually and it felt real smooth without any resistance or weird noises. Now I feel very confident that I can replace any bushings on my tractor using the power pack method you described. My next plan is the kingpins and bushings, I just ordered a hollow jack to pull and install the new bushings thanks to your video. Best Regards Gerard

[@coltongarber8087]

i love heavy equipment content may i please see more? i'd love to see videos of your John Deere 330LC

[@stephenmeeks684]

Great job cleaning.

[@sevanson1]

Great legwork re: info... Did you contemplate also heating the machine's bushing boss'. That would have created a significant fit advantage?

[@StevesFarmShop]

Hi There. Yes, my son was heating it with a heat gun for quite a while before I attempted to press the frozen bushing. It might've helped some but it seemed like without a clearance fit, the bushing swelled immediately when it touched the bore. I thought about a torch but wasn't crazy about messing up the paint. Thanks for the comment though!

[@DA-zi6eq]

Great video... very good info as well.... thank you for sharing!!! 👍👍

[@mikeedwards1768]

i have a similar issue with our 710g backhoe. on hot days after hours of digging started to squeak out the swivel pins. i found out using the proper grease and lifting the weight off the frame with hydraulics and greasing more often stopped the squeak 90%. might install grease lines up into the cab so dont need to stop and jump out every 30min. might be a deere problem!

[@FourthWayRanch]

Did you try a good penertating oil first?

[@trail457]

I would check the bore alignments. Looks like only a bit of the pin is hitting the bushing. The lold pins didn't look that bad.

[@stevenpringle7813]

What about using dry ice? Would that work?

[@stevenpringle7813]

I guess it won't since the liquid nitrogen didn't. Seems odd that the interference fit is so tight. Most people seem to have success with dry ice or liquid nitrogen.

[@StevesFarmShop]

Hello, this sure would've been easier because dry ice in my area is sold in the grocery stores and you don't need a dewar to handle it. However, dry ice is only -109F and liquid nitrogen -320F. Add your shop ambient temp to that, let's say 60F and you get a total delta of -169F vs. -380F, so over double the shrinkage of dry ice. I used one of the those online calculators for shrink of a pipe segment where you enter your ID, OD, and temp delta. Dry ice still resulted in an interference. LN2 got me to just about line on line, I thought if I worked fast it'd be OK. Nope! My conclusion after all this is that if you do the math and don't end up with a clearance fit at full shrink, don't even attempt the cold method. As soon as that cold bushing touched the hot rearframe bore, it expanded like crazy and hung up after only going in about 1/4 of the way. Brute hydraulic force finished the job. In hindsight I think the LN2 might've worked if I'd used a bore hone to knock the peaks down and better size it ahead of time. Maybe I'll try that next time. Thanks for the question.

[@stevenpringle7813]

@@StevesFarmShop Thanks for the information. Would you be able to share those links to the pipe shrinkage calculations?

[@StevesFarmShop]

Hello, sorry for the delay, been quite busy. I just did some quick searching and think the one I used is this: www.engineeringtoolbox.com/thin-circular-ring-radius-temperature-change-d_1612.html If you scroll down to the bottom of the page, you can enter your bushing diameter and temp delta. Before I tried the LN2 method, one of the only other videos I could find on the topic was the one from the Cutting Edge Engineering channel. Since he has some really nice equipment to do his own line boring and sizing, in that LN2 video he mentions some rules of thumb he uses for setting just the right amount of clearance. It's worth a watch and his videos are great.

[@pattyyoung3570]

Pins and bushings should ALL WAYS go together other wise you do rework, takes twice ass long and can wreck a new part . Never cheap out , will come back to bite you .

[@coltongarber8087]

i love heavy equipment content may i please see more? i'd love to see videos of your John Deere 330LC