|
jdemaris
11-20-2005 12:03:57
|
|
Re: 1010 diesel crawler timing in reply to Roger2561, 11-20-2005 10:14:24
|
|
| |
Without going out to my shop and looking at a pump degree timing window, I think 1/8" equals around four degrees on the pump, and therefore eight degrees on the engine since the pump runs at half engine speed. That's quite a bit. Now, if I understand you correctly, you are saying that if you advance, or retard, the oil-pump gear by one tooth, the injection pump comes completely out of range and you can't see the line at all? I don't think that is something I have ever encountered if true. Are you sure that the oil pump teeth aren't slipping back into the same place although you think they are advanced or retarded? I've seen that happen many times since the gears are sloped and helical. Anyway, it's pretty easy to verify. The tech. manual shows you - if the injection pump is off, and you look down the hole at the slot in the end of the oil=pump drive - exactly what position that slot is supposed to be in. Once verified, look at the corresponding tang on the drive of the injection pump. If that too, is in the correct location, and the timing lines of pump are NOT lined up - then the injection pump probably has the wrong timing lines in it. That piece of metal that has the moving timing line (that rotates) does not have a timing mark when new. The part (governor weight retainer) is generic and fits many injection pumps. So, when being installed for the first time, new or as a repair, the installer is supposed to figure out where the line is supposed to be - and use an etching machine to put the line on it. So, it may be etched on to the wrong position, or it may be a part taken from another pump, or other possibilities, I guess. If it were me, at this point, I'd run the machine. If it seems to be running too retarded or advanced, and the pump won't twist any further to accomodate, I might try simply grinding the slot longer since you say you're only lacking an 1/8". Also, if you have access to a timing light - it would enable you to ascertain when the pump is actually firing in regard to the TDC or BTDC position of number one cylinder. In other words, it would tell you if the timing lines are "lying" to you, or not. Using a timing light requires a pulse-pickup adapter. They are expensive and not many people have them.
|
|
|
