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Yanmar 3TN72 Timing
Thanks for all the input. I had an unexpected Dr Bill come due & I had to sell the JD!! -
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Yanmar 3TN72 Timing
Yes; but I got nothing. Your manual is very informative; I have a compression tester ordered & will perform the test when it comes in next week. This JD is so old & has been sitting outside for years; so the rings could be stuck or engine could just be shot. I removed glow plugs... -
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Yanmar 3TN72 Timing
Thanks; I will look into this manual; looks to be up to date compared to what I bought online. As soon as I get the proper tool; will check the compression & update this thread as to what I have found. -
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Yanmar 3TN72 Timing
I understand the timing marks. The JD tech manual I purchased did not have the Yanmar portion covered. I am fishing for answers since I cannot get this old JD to start; but I will be patient. Thanks for the replies. I sent an inquiry to Yanmar; maybe they will send me some data on the... -
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Yanmar 3TN72 Timing
I have another thread; but I need some more info trying to get a JD to start!! I own a JD 755 manual & I have done a search but cannot get answers. Does anyone know how to set the timing on a Yanmar Diesel 3TN72? -
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Yanmar 3TN72 Injector Pump
If the rings are stuck, can I pour some Marvel Mystery Oil or another suitable product into the intake & let it sit for a couple of days to see if they will unstick? Just a thought!! -
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Yanmar 3TN72 Injector Pump
Bob wrote "I'd disconnect the glowplug power, then try a TINY puff of starting fluid and note if it starts, or at least fires." I just tried this; w/glow plugs unwired; I sprayed 1 quick spray of ether & turned engine over. I could tell that it was trying to compress the ether by a... -
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Yanmar 3TN72 Injector Pump
I bench tested the Glow Plugs & tested the power to each one. This JD was owned by Ga Government; then sold to an individual that I bought it from; so I have no clue as to what has been replaced. etc. I will try the tiny ether spray. GLAD you said to unplug glow plugs; I would not have... -
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Yanmar 3TN72 Injector Pump
According to my search: I have to remove injectors to test compression like a spark plug on a gas engine; but I'd have to buy or rent the tester; so I am going to listen to you guys first to see if I may have missed something!! Thanks! -
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Yanmar 3TN72 Injector Pump
1. I removed glow plugs; bench tested; they were bad 2. Loosened all 3 connectors @ injectors & turned engine 7 times for 10 seconds w/a rest period. 3. Retighted all 3 connectors @ injectors. 4. Turned engine over 4 different times for a period of 5+ seconds & mist was shooting out... -
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Yanmar 3TN72 Injector Pump
Thanks; I will proceed w/that today. I sprayed some blaster around the top; going to blow that off & hope that they can be removed w/o any breakage!! -
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Yanmar 3TN72 Injector Pump
Getting power to Glow Plugs. WOW!!! I am getting old & not reading clearly. "From DieselTech: Now crank engine until you see air/fuel mist blow out each glow plug hole, this means pump is opening injectors and fuel is entering the chamber. Now install the plugs and engine should start... -
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Yanmar 3TN72 Injector Pump
I was"totally" wrong; it does have glow plugs & looking at the age; there are probably bad. Do I need to replace them before trying to start? -
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Yanmar 3TN72 Injector Pump
BTW: I have clear return lines from injector to injector; shouldn't I see some fuel in those lines as I am cranking? Maybe; they only return when pressure has reached a certain PSI? -
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Yanmar 3TN72 Injector Pump
No glow plugs. I have doing it wrong. I loosen 1 line @ injector; turn engine over; retighten & go to the next. So; I will give it a go tomorrow. Thank you very much.
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