Okay! As promised, here's New Saw Surgery. As mentioned, I have never taken a chainsaw apart before. As you might expect, it was a lot more involved than it really needed to be, but I learned a lot!
So here's the saw before I took anything apart. Oil should come out of that green tube and blorp onto the chain. Oil not come out! Problem! Dealers say go jump in lake! Also problem! Happily, (and maybe accidentally), Baileys Online has
the service manual for this saw where google can see it. I might not know what the hell I'm doing, but I have instructions! How bad could it be?
D-ring- washer, drive sprocket come off the clutch cover. Set the brake.
Push the brake towards release a little bit- enough to loosen the band just enough to pull the clutch cover off. If you release the brake, put it back on and try again.
Take the brake spring cover off. It just has that one little slotted screw holding it on. At this point, if you're going for the oil pump, you should also take the brake itself off; I didn't do it until later because I didn't think it would be in the way.
The service manual tells you to take this little piece of foam out next. I did. Why is it in there in the first place? For what possible reason did I take it out and then put it back later? Good questions. Leave the little piece of foam alone. Also, see that little black pin in the brake linkage, looks like the rounded end of a black screw? That is a little pin that is held in its spot by nothing whatsoever after you take the plastic cover off. If this proves a surprise to you, you may well lose it like I did and then be surprised that your saw has no brake. More on this later.
We have to take the whole muffler assembly off so we can jam something in the cylinder, so we can pop the clutch loose. That little triangular thing is a muffler bracket. 3 screws including that sneaky one on the side. Also, see those 3-tabbed stainless steel dealies at the top of the muffler? They're caps that I imagine are supposed to keep wood chips out of the recessed holes for the muffler screws; they just pull off. Take them off and get the two screws underneath them, plus the third longer muffler screw up top. Don't drop the aluminum standoff or the muffler gasket.
Here's the muffler assembly free of the saw.
Hello, Mr. Cylinder! We need to jam that piston using the special magic Dolmar Cylinder Wedge. Oh, wait, we don't have any special magic Dolmar tools.
Plastic coat hanger, stuffed with wood, wrapped in duct tape. Boom. You want something that is strong enough to get hammered between two pieces of metal but which will not scratch said metal or leave any little bits of anything behind! Make sure it's strongish, soft, and clean.
Super duper pistonjammer in action. Mock me if you must, but it worked. Now that the piston's jammed, we can pop the clutch loose!
I looked at the drawing of the Dolmar clutch tool and decided that I needed a 3 pronged wrench with a retaining cap to stop clutch parts from spraying across the room. Behold.
Well, that didn't work, and I put a dent in my hand besides. Time for a bigger better clutch puller tool!
Well, that didn't work, and it broke my 2x4 besides. Time to call Home Depot and ask the tool guy if I can borrow his Makita clutch puller. He tells me he doesn't have one because it's easier to use a punch and a hammer to pop it loose. .... well, he is SO RIGHT. I don't even have a picture of this because it worked so fast. It's reverse threaded, so put a big punch or big screwdriver down in there and bang it clockwise.
The white thing is the clutch drive for the oil pump. Behind it.... the promised land! The oil pump herself!! It looks like the drive thing is in good shape.
Two screws are all that separate me from inspecting the pump and its plumbing. Well, that and that pesky brake, which I can now see is going to need to come out.
I'm not sure if there's going to be oil everywhere when I pull the pump, so I drain the saw. That saw holds a LOT of oil! Let's see if I can remember which glass has my drink in it and which one is significantly less tasty. (Editorial note: By the end of this adventure, I did indeed get to taste bar oil several times, but not because I drank from the wrong glass.)
Someone who knew anything about chainsaws would have said, "Hey, I think I see the problem!" at this point. That someone was not me. I was also not the guy who drained the oil and saw the problem before he took anything apart. But if I knew what I was doing, you wouldn't have this photo essay to entertain you, so there's that.
Pop the brake band out, remove two pump screws, and the pump lifts right out with a little wiggling. At this point, I saw what I thought was the problem: NOTHING connects the feed tube and the oil pump. I checked the exploded diagram in the service manual to see what was supposed to be there, and the answer is: NOTHING. WTF, Dolmar people. That green tube end just kind of sits on the outside of a hole in the pump. So if your saw drips oil out the case sometimes, that's a design feature.
The black tube is the supply line from the oil tank.... IT gets a nice aluminum 1/8" barb connector on the oil pump. Unlike the green discharge tube, which just kind of sits on a hole in the pump and hopes for the best. Did I say 'WTF' yet?
Here's the plumbing for the oil supply from the tank to the pump. Plastic L-barb on the straight side, and the aluminum barb on the oil pump goes into the other side. Notice how both sides of the tubing have some sort of appropriate connector to allow fluid transfer? Are you taking notes, Dolmar? I am able to blow air through this line. The bar oil tastes about like you'd expect. The green thing in the photo comes out next- it just snaps in, pry it gently out with a flat screwdriver and a pair of needlenose.
Holy cow, I just pulled the intestines out of my saw. Lookit that. I can blow air through the intestines and filter, too. Bar oil still tastes about like you'd expect.
Blew air through the green output tube. Bar oil still tasting mighty fine. Hooked the green tube to the input side of the oil pump and used it to try to draw some oil through the pump to see if it worked. It did not work. Not sure if this means the pump is defective or that it was just operating at about 13,440 RPM less than it was designed to. Results inconclusive. Took the pump apart as much as I could, looked okay, put it back together.
Put everything back together. Clutch took three tries because I kept getting the brake wrong (it's easy to get part of it underneath the clutch cover; it goes AROUND the clutch cover.) Hey, look what you can see under the oil cap now.
Took her out and tested it... and THE OILER WORKS! Huzzah! One thing I did not know when I took this photo: See the linkage pin that makes the brake work? The little black one we talked about above, the one that's not retained by anything? You don't? That's because it's not there. If it's not there, the saw has no brakes. I soon discover that my saw has no brakes, I find out why, and spend 30 minutes crawling around looking that that stupid black pin (and the muffler screw that I lost).
SO, the pin and the screw both fell into an alternate plane of reality on the way to the floor, and are not to be found. I hope they're happy in their new life; perhaps in the happier universe they went to one of them will win the next Presidential election. I know I would vote Pin or Screw in a heartbeat. Since they're off having those wacky adventures, I fabricate a new pin using a roofing nail and a file. Works fine. I go to Home Depot and get a new muffler screw- 5mm x 0.8mm x 20mm cap screw. It has an Allen head instead of a Torx one, which is annoying, but at this point I just want my damn saw to work.
This is out of order, but look how beat up my cylinder jammer got!
Everyone suffered today.
...but now the suffering's over, and the saw is oiling nicely and it has WOOD CHIPS and SAWDUST on it!! Huzzah!
I did not learn for sure what the problem was. My first guess is that the oil feed line was all kinked up inside the oil tank. My second guess is that the oil pump had some sort of problem that was resolved, as so many problems in my house are, by my disassembling it and squinting thoughtfully at it. My third guess is that the discharge line was sitting crooked underneath the oil pump, and since only hope and good intentions join the oil pump and the discharge line, it didn't work.
I DID learn lots of other things, starting with "If you have an oiler problem, one side of the saw has a big hole that leads to the most likely problem, OR you could take the whole damn saw apart and dig through from the far side, whatever floats your boat."
Special thanks to jatoxico and Jon1270, who gave me some good tech support inline, the web guy at bailey's online who accidentally left the Dolmar service manual lying around, and a big "hoo-rah" to the Home Depot tool tech who told me to forget the magic clutch popper tool and just hit it with a hammer. =D