(quoted from post at 09:25:22 01/24/15) This thread was split up so here is the first part of the thread for people looking at it in the future.
http://forums.yesterdaystractors.com/viewtopic.php?t=1116451
For the compete story and symptoms read the above post first...
So yet [i:b2664082e1]another[/i:b2664082e1] year has passed, dozer sat in the yard all alone for the whole year and the bag of Spaco parts on the coffee table, but this week I finally got around to rebuilding the IP and I wanted to complete this story.
Once I got the pump apart I could indeed confirm that the governor retainer ring was completely gone, and that the steel ring had worn through one rivet completely and was working on the other 2. I left the head intact as the machine, other than the miss and pops, ran very well and I didn't want to get into the little bits of the pump end. The pump was extremely clean with no signs of any particles or "stuff" remaining. I didn't have the Bristol splined wrench but had a torx 45, and with some careful application of foil around the end to make it a tight fit, managed to get the cam screw out without breaking it. Impact wrench on lowest setting and she popped right out. Lucky :lol: I pressed out the old pilot tube as it had some decent grooves worn into it from the umbrella seals, cleaned the bore and mixed up some JB weld and pressed in the new one. Found out it should be flush on the inside surface of the pump body, which leaves about 1/8" sticking out the front of the mounting flange. I went to the local Diesel shop and they had a drawer full of Roosa Master parts, and the fellow gave me a good used governor weight retainer and check ball fitting for the return line, as someone had drilled mine out at one point. Then carefully put on the new damper ring, reassembled the rest of the pump, making sure to get all the registration marks correct, reconnected the governor and all the springs and such (make sure you get the shut off cam mounted correctly :roll: ) and waited for the rain to stop and installed it in the machine. Make sure to have the engine at TDC with the pin inserted into the flywheel, and the timing mark showing in the timing window on the pump before you remove the pump, and don't touch the engine until it's time to go back together. Look at the end of the shaft and notice the punch mark, ensure it matches the punch mark on the slot inside the pump, where the shaft seats.
Took about a half hour and was ready to fire up...with my trusty tennis ball emergency shut off device in hand and with the pump all bled, I turned it over and after about 10 seconds of cranking she fired up, sputtered and popped until all the air came out of the lines, and roared to life! Ya baby! What a difference. Runs smooth and sounds so much better. Jumped on the machine and took it for a little run around the yard...and in the process dumped the top tray of my tool box off the far track and drove over it (don't tell me you have never done THAT
) Doooh! Got it back to the work area and found I couldn't shut it off, got down to a trickle of an idle but wouldn't shut down. I had to dump the clutch in 3rd gear as my tennis ball wouldn't kill the engine. Apparently I have an air leak somewhere between the air intake pipe and the manifold.
Posted here for some help, and thought about it for a while, and Dieseltech mentioned the shut off cam...shut off cam you say? what's that? Well I found out it is the little clip, with one longer arm on it, that secures the throttle shaft halves, and pulls the metering rod completely closed when you close the throttle, I had it on backwards, and it was doing nothing. Easy 5 minute fix right on the machine as it is just under the governor spring cover with only 3 screws and no need to remove the pump. Tried it again and it works 100%. Thanks Dieseltech!
Thanks all for the help...it took me 2 years but it's running perfectly. Not completely sure what fixed it, whether it's having the weight retainer back in or having the check ball back on it so that correct pressure is obtained inside the pump, but I am happy.
Here are a few pictures and a sound clip of it running....compare it to the sound clip at the beginning of the thread in part 1....amazing difference.
Cheers
JD350 running again sound clip
[u:b2664082e1][color=blue:b2664082e1]
JD350 fixed[/color:b2664082e1][/u:b2664082e1]
All apart ready for reassembly
Torx 45 disguised as Bristol wrench (it was Halloween)