Wow this is quite a project! Sorry I missed it before. 
Coincidentally I just helped an old farmer friend here with his wood processor by making a part. Just a small bit -- he would stop getting bar oil to the chain periodically and couldn't figure out why. I pulled the hose from the oil reservoir off the bar block, and the mfr had used a split roll pin as a hose nipple!
I have no idea why -- I guess it was cheaper than machining a barbed nipple with a smooth end for a press fit in the block, or making a threaded nipple. I dunno, but anyway as the hose loosened and backed off when the bar dropped repeatedly to do the cutoffs, oil would leak out of the split in the roll pin. The pin was too smooth even with 2 hose clamps to hold the hose from moving eventually. My friend, who is getting old and a little less observant would see oil dripping down off the bar block and figure he had enough flow -- but didn't realize it wasn't getting to the chain. Well he realized it wasn't because of the heat. and going through bars, but didn't understand why.
Anyway I turned him up a barbed hose fitting from a piece of steel rod, added a flange for a stop and turned the rest for a nice interference fit in the hole. Drilled it out to the same ID as the roll pin and pressed it into his bar block. Now the hose stays put, and without the split pin, it can't leak.
I'd mentioned a couple months ago over coffee that I was looking for some culvert to use to move my driveway entrance. Last week I heard a truck pull up to my drive, and then a big bang. And then a truck revving up and tearing out of here. By the time I got out of my shop to see what was what, I saw Pete's old dump truck tooling away down the road, and a big piece of culvert sitting in my driveway. He didn't want any thanks.
Coincidentally I just helped an old farmer friend here with his wood processor by making a part. Just a small bit -- he would stop getting bar oil to the chain periodically and couldn't figure out why. I pulled the hose from the oil reservoir off the bar block, and the mfr had used a split roll pin as a hose nipple!
I have no idea why -- I guess it was cheaper than machining a barbed nipple with a smooth end for a press fit in the block, or making a threaded nipple. I dunno, but anyway as the hose loosened and backed off when the bar dropped repeatedly to do the cutoffs, oil would leak out of the split in the roll pin. The pin was too smooth even with 2 hose clamps to hold the hose from moving eventually. My friend, who is getting old and a little less observant would see oil dripping down off the bar block and figure he had enough flow -- but didn't realize it wasn't getting to the chain. Well he realized it wasn't because of the heat. and going through bars, but didn't understand why.
Anyway I turned him up a barbed hose fitting from a piece of steel rod, added a flange for a stop and turned the rest for a nice interference fit in the hole. Drilled it out to the same ID as the roll pin and pressed it into his bar block. Now the hose stays put, and without the split pin, it can't leak.
I'd mentioned a couple months ago over coffee that I was looking for some culvert to use to move my driveway entrance. Last week I heard a truck pull up to my drive, and then a big bang. And then a truck revving up and tearing out of here. By the time I got out of my shop to see what was what, I saw Pete's old dump truck tooling away down the road, and a big piece of culvert sitting in my driveway. He didn't want any thanks.