yanmar 3 cyl desiel wont start: Tractor Engine Repair Rebuild  -- Tractor Maintenance Discussion Forum and Review yanmar 3 cyl desiel wont start: Tractor Engine Repair Rebuild -- Tractor Maintenance Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

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 05-28-2004, 13:17 Post: 87111
brian diger
2004-05-28 13:17:56
Post: 87111
 yanmar 3 cyl desiel wont start

i have a takeauchi 1.5 ton digger with a yanmar 3 cyc 3n engine i have tried everything to start the thing i am being polite

fuel glow plugs ect has any body got any ideas compresion seems ok there is a lot of pressure from the rocker cver vent /
dont know if this is normal

help

brian the digger spain







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 05-28-2004, 13:55 Post: 87112
Murf

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 yanmar 3 cyl desiel wont start

Hola Brian, depending on how the controls to the engine are arranged on your machine the engine is stopped by either an electric solenoid or a cable-pull. Both of these methods stop the engine by dumping the fuel back to the tank instead of into the engine for ignition.

If the engine is cranking over fine, developing compression and getting fuel but not starting, check this shut off.

You mention a lot of pressure from the crankcase via the rocker cover, on an older machine this will happen from blow-by, but it should not be very substantial.

Try starting it by putting a small amount of fuel into the intake, WD-40 works well. If it tries to start on this then you know the problem is fuel-related at least.

Best of luck.






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 05-29-2004, 07:04 Post: 87154
TomG

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 yanmar 3 cyl desiel wont start

The Yanmar engines used on compact tractors are direct injection engines and have manifold heaters rather than glow plugs. Some of the systems ignite fuel dribbled into the intake manifold and at least one of these has a plastic jug for the fuel that has to be topped up manually.

I'd verify that it's getting fuel as Murf mentioned and also that the intake manifold isn't obstructed. or in need of a new air filter and I would verify that the pre-heating system is working. Even if the pre-heater is working, it won't start easily if the starter doesn't spin the engine fast enough or the compression is low as Murf mentioned. I'd check battery/cables and starter. A compression test might be good.






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 05-29-2004, 21:52 Post: 87210
Chief



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 yanmar 3 cyl desiel wont start

What is the latest with your Yanmar Brian?






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 05-31-2004, 07:50 Post: 87319
BFlude



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 yanmar 3 cyl desiel wont start

thanks Murf my beast has a soleniod stop tis woks ok electrically am about to diss slider mech to have a look






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 06-01-2004, 13:46 Post: 87438
BFlude



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 yanmar 3 cyl desiel wont start

THANKS TO YOU ALL I HAD BEEN HOPING THAT IT WAS NOT TERMINAL

ENGINE IS NOW ABOUT TO BE TAKEN OUT AN THRASHED

ON FURTHER INVESTIGATION 6 CRANKS OF THE STARTER WITH THE BREATHER BLOCKED BLOWS OUT THE DIP STICK

HAVE TRIED WD 40 ETHER SOME 12 YEAR OLD SCOTCH I DRUNK THIS RATHER THAN USED IT TO START THE DAM THING

LOOKS LIKE I AM IN FOR A STRIP DOWN RINGS OR HEAD GASKET OR SOME OTHER FOUL THING






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 06-02-2004, 23:53 Post: 87594
dfkrug



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 yanmar 3 cyl desiel wont start

It's the rings. Yanmar makes a 1/4 mm and 1/2 mm overize
pistons. Expect them to be 67-88/ea, incl rings. I am
doing my 3rd 3TN84 rebuild now.

Good luck.






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 06-06-2004, 13:51 Post: 87852
BFlude



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 yanmar 3 cyl desiel wont start

THE ENGINE HAS 4027 HOURS BUT I THINK YOU ARE CORRECT SEEMS LIKE THAT
HAVE REMOVE ENGINE AND MECHNICO WILL WILL STRIP AT THE WORKSHOP MAY BE THIS WILL TAKE SOME TIME THIS IS SPAIN


BIGGEST PROBLEM WHY DO THEY ALWAYS STOP IN THE MOST DIFFICULT POSITION

I WAS DIGGING AN AREA FOR A SWIMMING POOL HAD TO HUMP THE ENGINE OUT BY GRUNT AND SWEAR WORD AND THEN CARRY 120 M TO A VAN IUN A WHEEL BARROW

I AM STILL SMILEING BUT AM TAKEING NO WATER WITH MY WHISKY AT THE MOMENT THAT ONLY BECAUSE WE HAVE NO WATER AT HE PRESENT

BY THE WAY HAS ANYBODY OUT THERE USED DEEPROCK HYDRODRILL 1/2 MAN WELL DRILLING RIG FROM THE STATES I AM THINKING OF GETTING A RIG TO WATER DOWN THE WHISKY

THANKS FOR YOUR SUPPORT

BRIAN THE DIGGER SPAIN

BY THE WAY IT 30 DEGS C HERE TO DAY






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 07-08-2004, 13:18 Post: 90355
BFlude



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 yanmar 3 cyl desiel wont start

WE HAVE HAD A STRIP DOWN AND REBUILD NEW RINGS PISTONS ECT REBORE

IT NOW AS SWEET AS A NUT

THE BILL WAS NOT SO SWEET THE PISTONS AND RING SET 247 EUROS EACH A TIMES 3
GASKET SET 147 EUROS
300 EUROS FOR THE REBORE

AND 1000 EUROS LABOUR

HAVE I BEEN RIPED OFF OR AM I OUT OF TOUCH IN THE UK I COULD HAVE BOUGHT A NEW ENGINE NEARLY

THE BEST BIT IS THAT THE TOTAL BILL IS 2660 EUROS I DID A LOT OF THE REMOVE AND REFIT AND THE WANT SALES TAX AS WELL BUT WOULD PREFER CASH

ARE ALL ENGLISH LIVING IN SPAIN STUPID OR JUST TO RICH
I DID NOT THINK I WAS ANY OF THESE

BUT IT SEEMS I AM

AWAITNG SOME FORM OF SUPPORT OR DONATIONS






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 07-08-2004, 17:56 Post: 90368
dfkrug



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 yanmar 3 cyl desiel wont start

Ouch!

If you have the Yanmar 3TN84 engine (84mm bore), you should have been able to get pistons with rings for less $100 EACH.
Sure you don't mean 247 Euro for the 3? I paid about $75 each for the 1/2 mm oversize straight from the John Deere dealer (my tractors use the Yanmar 3TN84 engine).

Gasket sets are expensive, but I find you only need a few of the things in it, esp the head gasket ($30). Yanmar uses a lot of RTV silicone instead of gaskets.

Finally, if it is any consolation, a new engine is prob not available anymore from the manufacturer. I found some at a JD dealer a year ago, and they were $5400 each for the long block. Forget it. On that basis, you did not do too bad.






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

Thread 87111 Filter by Poster:
2 yanmar 3tn84 engines for sale 1 | auerbach 1 | badluc1 2 | BFlude 4 | brian diger 1 | Chief 1 | dfkrug 2 | jegssr 1 | Murf 1 | nexus7 1 | TOMCROUZ 1 | TomG 1 |

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