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Mel your help with a timing question

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loneranger27

03-07-2008 18:26:34




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Is it common for the harmonic balancer to loose its position on the crank pulley or is it just a possibility? And if the pump is 180 out of time would the tractor run or seem to run correctly but just smoke like it has unburned deisel coming out of the exhaust. Your help is appreciated.

Thanks




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loneranger27

03-08-2008 22:47:02




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 Re: Mel your help with a timing question in reply to loneranger27, 03-07-2008 18:26:34  
Here's a small update. I got home today and got my injection pump back from my repair shop. As i feared timing it and putting it back on did not do me any good. I can get it started on either and the engine smokes and runs poorly for about 15 minutes and I have to keep giving either to keep it running then it levels out and runs good but still smokes. If I move the pump towords the left side of the tractor the rpms will increase and the tractors runs a little better. Does the fact that the engine rpms increase and it runs fine show that I need to remove the pump and move it a tooth or two ahead? and if so would I turn the grear on the pump to the left of the tractor or the right?

Thanks

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mEl

03-09-2008 04:21:37




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 Re: Mel your help with a timing question in reply to loneranger27, 03-08-2008 22:47:02  
You can slip it a tooth and see what happens, sounds like it is out if you can improve it by moving the pump. if you timed by damper and are having this problem you are still going to have to verify #1 TDC on compression stroke if you want to be accurate. Until you do this you are only guessing. Good luck. If you are improving it by rocking the pump in then the gear should be turned over the top toward the right side or down in the timing plug hole.

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Walt davies

03-08-2008 08:23:14




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 Re: Mel your help with a timing question in reply to loneranger27, 03-07-2008 18:26:34  
If the damper has come loose then its most likely going to make a lot of noise and the engine will run rough and sooner or later thing will completely comer apart. You system to determine top dead center can be off by several degrees as the crank passes by the top it will not move the piston for 5 or more degrees.
Look at the damper and if the rubber looks good its Ok if it has come loose the rubber will be all chewed up around the edges.
Walt

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mEl

03-08-2008 13:35:15




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 Re: Mel your help with a timing question in reply to Walt davies, 03-08-2008 08:23:14  
Walt. I don"t disagree with your thought on the system I recommended , a positive stop on the piston and turning stop to stop and warking TDC in the center between the two marks is how I do my competetion engines that have pulleys that are not marked but The method I recommended should pick out a obviously slipped outer ring, Incidently I just saw one of those front pulleys laying at our place of business this week that had been replaced for that reason.

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mEl

03-08-2008 04:43:32




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 Re: Mel your help with a timing question in reply to loneranger27, 03-07-2008 18:26:34  
The damper slipping? It happens frequently enough to be of concern, If the unit runs smoothly after getting it up to speed it is unlikely it is 180 out. You are going to have to verify tdc and go from there. As I said before, drop the #1 intake valve down on top of the piston at TDC and use a dial indicator on top of the stem to deternine TDC, then compare to the damper markings, then you will be certain. Those diesels are not fussy within a degree or two, but you could be out way further than that if you timed it by a slipped damper. Grizzly sells very inexpensive reasonable quality magnetic base dial indicator sets if you do not have one, when doing this work and ring and pinion setups they are invaluable. mEl

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mEl

03-08-2008 04:43:31




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 Re: Mel your help with a timing question in reply to loneranger27, 03-07-2008 18:26:34  
The damper slipping? It happens frequently enough to be of concern, If the unit runs smoothly after getting it up to speed it is unlikely it is 180 out. You are going to have to verify tdc and go from there. As I said before, drop the #1 intake valve down on top of the piston at TDC and use a dial indicator on top of the stem to deternine TDC, then compare to the damper markings, then you will be certain. Those diesels are not fussy within a degree or two, but you could be out way further than that if you timed it by a slipped damper. Grizzly sells very inexpensive reasonable quality magnetic base dial indicator sets if you do not have one, when doing this work and ring and pinion setups they are invaluable. mEl

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