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YM155D charging reliability
the "magneto type"charging system is very reliable-used for decades on most motorcycles and small engines,those usually putting out AC current to a rectifier regulator.If your stator coils are still good,you can disconnect the diodes,solder on a couple wires to stator coil for AC output to an AC... -
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YM 2010D OIL Pump Failure & No Start (part 2)
sleeves/rings might also be- in good shape-especially if the air filter has been maintained properly and no serious overheating has ever occured-with pan off,exposed portion of sleeves can be inspected whan piston is at top of stroke:look for heavy wear or scratches in sleeve.With air filter... -
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YM 2010D OIL Pump Failure & No Start (part 2)
will be interesting to see what is found once the sump plate is removed-inop oil pump is never good,but these yanmar engines are apparently very tough-you may get lucky <E>8)</E>- My 1500 had very badly worn mains and oil pump(caused by water in oil from a freeze crack)but the rod bearings and... -
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date of manufacture
my 1500 had a 1975 casting date on the right side of the cast iron "chassis"the horn,hydralic pump,and voltage regulator were latish(~4th quarter) 1975 dated and a 1975 date mark on the inside of the timing gear cover.My tractor is S/N 03756,there were no date stamps on external surfaces of the... -
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charging system
the way diodes are connected now is actually mostly right-just the two yellow AC output wires have been added,and probably a DC output wire has been removed-would have connected to the diode plate insulated from the generator body and connected to a cutout regulator or other charge regulating... -
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charging system
the diodes are doing nothing the way they are wired now-originally the diodes were connected as a "bridge rectifier"circuit,putting out ~20-24vDC at maximum engine RPM. The diode wiring can stay as it is now if you use an AC input rectifier/regulator-if you cannot find an original type,many... -
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charging system
the dymamo pictured in reply#9 is different from the one in my late '75 built 1500:the dynamo pictured has 4 diodes built in for unregulated DC output(though the way the wires are connected at the diodes,you will have AC output on the yellow wires)on my 1500's system the dynamo is AC output with... -
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charging system
if the dynamo(generator)gets hot and discharges the battery,you have a faulty or wrong regulator,grounded stator winding in the dynamo,or wrong wiring-letting the battery discharge through the stator winding.I refurbished the dynamo on my 1500 and the insulators on the ends of the 3 stator coils... -
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yanmar 1300d
my 1500 had freeze cracks between the liners top and bottom-repair wasn't too hard-if 1300 engine is like 1500,you could take the sump plate off and look for leak evidence around the liners. -
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186D Power shift has lost drive to wheels and PTO.
from what i could tell from the parts list,186 uses the splined coupler between the clutch shaft and tranny input shaft like many other yanmars-this coupler can strip out and result in no drive or PTO(the coupler on my 1500 was nearly stripped when i took tractor apart for engine repair)Coupler... -
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YM1500D Freeze Plug
i meant mine was made early in the "red"era <E>:wink:</E> -
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YM1500D right front leak from wheel assembly???
there are 3 rubber seals that could be bad and causing the leak-most likely is the big middle one,these is also a small one up top covered by a bolt and washer and the wheel axle seal.Had to do this repair on my 1500D-the wheel seal was ok,the top one was replaced because of dust wearing and... -
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YM1500D Freeze Plug
i looked at my 1500(early build"red")and mine has no freeze plug there -does have hex head,screw in oil galley plug a little below the starter though. Old,rusted freeze plugs can be a little stubborn-usually i will drill a hole in a bad freeze plug,thread a sheet metal screw in and use that to... -
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"loose"front main...
got the crank back from the machine shop today-took a while because the usuall guy had a heart attack and was on light duty for a while,but they did a nice job and fit is good <E>:wink:</E> as soon as i finish engine repair on my Z28(water got in,bent a con rod-had 200,000 mi.anyway...)i'll roll... -
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Bearing replacement on RS1200 tiller
that bearing hasn't turned in a while <E>:shock:</E> looks like you will have to replace the shaft or take yours to a shop to have it built up and repaired back to size...A sealed bearing has rubber seals covering the balls to keep the grease in and dust out.
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