Today a few of our ACMOC, Chapter 3 Minnesota members got together to remove the engines from 2 Model 11 graders. The old Super 6 Pettibone was up to the task of gently sliding the 2,800 lb units out. We have three stuck power units and two complete chassis, one with little wear. Our goal is to build one decent machine out of the three as well as provide some pistons and other in-attainable parts for a RD6 a member has. 1. Trying to get the flange off the live shaft. A little heat and it fell off the tapered shaft. 2.Helping on the live shaft from inside what's left of the cab. 3. Removing bell housing bolts. 4. Checking to insure we didn't miss anything before lifting it out.
More pictures. 1. Bob in the OSHA approved three point stance in order to insure he doesn't fall over. Toolbox ready to pop free when the team is clear. Need it removed to remove the rear end cover to get to the mounting bolts that go up into the oilpan from inside the pumpkin. We saved the shim stack for reassembly. 2. Engine hanging free. Two point hookup on the Super 6. One on the forklift. one on the main boom, Makes it super easy to adjust angle. 3. Ready to set it down and go for lunch.
[QUOTE="old-iron-habit, That's Great that your saving her. Thanks for the pictures. Tom
On Saturday we pulled the other engine and loaded them out to one of the members shop for the rebuilding. We also took 4 good tires off to use on a 3rd model 11 grader that was gave to the club. The frame was removed on that one and made into a pull grader. The power unit has had a hitch installed on it to move it around. Was done at noon in time for a brat fry over a wood fire using a fire ring made from worn out Cat 30 track pads. You can see a future Cat mechanic setting on my lap. He loves equipment and it was a good spot to insure he didn't get under anything. s some pictures of Saturdays activities.
Cool beans! I'm glad there are others out there who think the past is worth preserving.
Saturday the chapter gathered for a work day and chapter meeting. The goal was to disassemble the 3 Model 11 engines. D6600 series engines. After removing the frozen Bendix we discovered that one of the pony motors turned freely. We pulled the head on it and found the valves to be working and things looking generally good inside. We are going to give it a hone job to clean things up a bit, grind the valves and take a look at the bearing as long as we got it off the machine. Al in all we are pleased that it is easily fixable. The 2nd engine is the one that sat in the MN north woods for at least 38 years since it was run last. It did have a bucket on it when I first looked at it but it was stuck fast. The main clutch was frozen solid with rust and the steel plates had to be busted with sledge and big punch to get them out. After a hour or more of beating breaking and pulling them out in pieces we noticed the flywheel seemed to move a bit. We pulled the valve covers, loosened the valves, and noticed that they all were free. We pulled the injectors dumped a bit of tranny fluid in the three holes and a few minutes later tried turning it over. It cranked fine with a three foot tune up wrench on the front pulley. Adjusted the valves and it has compression. Some fuel shot out of the injection lines when we were cranking it. It seems we may have a runner. Between the decent pony and the free engine we are well on the way. We never did get to the third engine although we did get it in the shop and set up on blocks. EDIT: The young man in picture one and two is getting the tabs bent on the flywheel bolts. He holds a mini LED flashlight in his mouth aiming to where he is working copying a good habit his dad has.
taking it to Texas?
cool project OIH, will be fun to watch the progress.
Update on the Model 11 project. When we started tearing down two of the model 11 we discovered that the one that set with an open exhaust for at least 37 years would turn over once the pony motor was removed. On the other the main was rusted up but the pony turned over. Fast forward to last Saturday. We cleaned up and installed new rings in the pony that turned over. A carb rebuild was done and tested on another RD6 a member owns. We rebuilt the starter pinion as both had been rusted tight. There are three variants of exhaust on these pony motors. One variant looks correct but the exhaust flange sets about 3/16" from the main exhaust where it plumbs in. Most folks install the bolts and suck it up thinking that's the correct way. A few starts later they have another cracked exhaust. We made a filler shim and used two exhaust gaskets. Think it will work fine. We struggled for a couple of hour trying to start the pony on Saturday. We finally figured out that the mag was firing on impulse about one out of 5 times. A member happened to have a mag that he had just rebuilt for another member that did not show with him. We changed it out and it two cranks the pony run like a top. With the bellhousing with the pinion engagement lever attached still off the machine we used a stick to safely engage the pinion and spun the main over on decompression. after a few minutes we thru the compression lever and it started to pop even with the throttle shut down. We pulled the throttle and it started to run on two cylinders. In a minute we shut it down and pulled the injection cover off. The center injection pup was stuck in the up position. A shot of penetrating oil and a gentile massage with a cloth covered plier and it was free and good to go. We re-fired the pony and the D6600 fired to life and ran super clean. We had a oil leak. we forgot to plug the oil line going to the gauge. A members finger in the dike worked fine for as long as we ran it. Being as we still have a lot of winter left we are thinking of taking the chassis to the shop and install the engine and start seeing how the chassis is. I have some short videos that it says are two large to load so will have to try to load them to U-tube and post a link. I'm not to savey but will try to figure it out. EDIT, Not sure why the pictures posted double.
If I did this right it should be a video of the D6600 running.
It works. Did the grandkids help you?
If I did this right it should be a video of the D6600 running.
Did it myself. Here's one more short one with Andy's finger in the dike.