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Post by barnhouz on Oct 7, 2017 23:32:31 GMT -5
Hi new to the forum. I am cleaning up and repairing my dad’s old xl-2. When I dug the saw out of dad’s garage it hadn’t been run for about 20 years. I cleaned it up and rebuilt the carb and got to run. Now my problem I can’t for the life of me get it to oil the bar. I have changed the oil lines, the diaphragm and the duck bill. I cleaned the pump cylinder. I can get air to move through the discharge nozzle from the pump when I use a small wire. So that is not blocked. Funny thing is when I use the plunger connected to the diaphragm I can’t get air to move. I measured the plungers of both diaphragms and they are good according to my service manual. Any ideas would be greatly appreciated.
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Post by undee70ss on Oct 8, 2017 1:43:25 GMT -5
One of the biggest misconceptions on the XL, XL2, Super 2 series is that the diaphragm is a pump, it is not. It's acts as a on/off valve to regulate the flow of oil. To pump oil, the oil tank must be pressurized from the crankcase. If the lines or the oil cap leak, tank will not build pressure. Another very common reason for oiling issues is the oil lines being reversed. The oil pickup line goes to the square fitting on the crankcase.
Since it was all apart, even with everything correct, it will take 3-5 minutes at WOT to prime the system.
If your still having problems, post back, there are other tests that can be done.
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Post by barnhouz on Oct 8, 2017 14:54:03 GMT -5
One of the biggest misconceptions on the XL, XL2, Super 2 series is that the diaphragm is a pump, it is not. It's acts as a on/off valve to regulate the flow of oil. To pump oil, the oil tank must be pressurized from the crankcase. If the lines or the oil cap leak, tank will not build pressure. Another very common reason for oiling issues is the oil lines being reversed. The oil pickup line goes to the square fitting on the crankcase. Since it was all apart, even with everything correct, it will take 3-5 minutes at WOT to prime the system. If your still having problems, post back, there are other tests that can be done. Hi I ran the saw this morning for 5 minutes at wot. And low and behold I got the oil to flow. It seems to be dripping a lot at the back of the bar. Can I lesson the flow of oil by adjusting the distance between the duckbill and the end of the oil line. Thank you for the info I was beginning to think the little beast was going to spend its days as a shelf queen |
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Post by undee70ss on Oct 8, 2017 17:34:05 GMT -5
How close is duckbill to line?
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Post by barnhouz on Oct 8, 2017 18:55:46 GMT -5
How close is duckbill to line? It is about 1/6 of an inch maybe a little less I guessed at the measurement. |
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Post by undee70ss on Oct 8, 2017 23:42:00 GMT -5
Try pulling it apart farther, exposing more of the porous connector, but no more than 1/8 of a inch.
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Post by Supercharged86 on Oct 10, 2017 8:28:05 GMT -5
Check the diaphragm closely. I had an XL-2 oiling problem a while back and after changing everything else in the system it turned out to be a diaphragm problem. The diaphragm material had loosened around the rivet where it's attached to the stem (likely just from old age). As a result the crankcase pulses just leaked past the stem instead of pushing the diaphragm out. Just to confirm my suspicions I fabbed up a replacement diaphragm cover with a large hole so that I could see if the diaphragm was pulsing back and forth with the motor running. As I suspected, no pulses. I carefully re-peened the rivet end to tighten it up and whala I now have oil.
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