YMG1800

[BillH]

I just bought a Yanmar YMG1800 and I don't see a listing for that model at the Hoye Tractor site. What should that model be equivalent to in their listing, for basic maintenance parts. By Internet poking around, I'm thinking F18 or YM180 or YM1800, but they're all starting to look the same...

--Bill

[SDgray]

does it have "gray market"japanese features such as japanese labels or throttle that is pulled back to increase RPM? .Welcome BTW.

[BillH]

Oh, it is definitely Gray-- hand throttle that pulls back, all manner of Japanese labels (tho it does have some English labels).

Thanks,

--Bill

[winston]

I read on another forum it is very close to a John Deere 750 4 wheel drive. The 750 has basically the same engine as my ym2002d (3t80u-nap). What engine does your ymg1800d have?

[BillH]

The Engine# is 3T80U-SB. 3 Cylinder, 20HP, 2WD.

So it is close (not sure what the difference in the -SB and the -nap suffixes are).

My first tractor. I'm having fun...

--Bill

[winston]

The John Deere 750 has a 3t80u-j. Like you, I wonder about the suffix letters. I know the p on the end of mine is not on all ym2002d tractors. Mine has power steering so I sort of conclude that p may have something to do with that but of course that is just my thinking. Where did you get the 20 hp? Is that on the engine plate? The ym1802 has a 3t80u-nb but is only rated at 18 pto hp.

Best of luck to you with your new purchase. I think the YMG series have a few more bells and whistles and went up to 3 cylinder engines.

[Brijoe]

Bill,
Hoye does list your tractor in the specs section
http://www.hoyetractor.com/specs.htm
You may have to call them direct to see what they have available.
Good luck

Winston just a side note Hoye's specs show the 1802 as a 21hp at the engine

[Norm]

The "G" models are just later versions of the original, (YM1800, 2000), that first came out in 1988. Aaron, (Hoye), can probably tell you what specific parts differences might be.

[BillH]

The Engine Plate says 18HP, I think I got the 20HP from a "tractor info webpage". Ah, Hoye does list a "G1800D", with 20HP. Some specs float.

I'll get used to finding out which parts fit where...

Two days and "I don't see how I ever did without one..."

--Bill

[BillH]

I've gotten an Operation Manual from Hoye and have been going through and zeroing out the maintenance and checking the tractor out.

One thing that is puzzling is a 5/16" (8mm) hose that runs from a barbed hose fitting on the block just ahead of the starter to a hose fitting on the lower tank of the radiator. This hose is shown (but not numbered) on the (YM220) engine parts diagram in the Operation Manual. It passes close to the (unused and abandoned) coolant drain plug on the left frame rail and I suspect that this hose is just a block/radiator drain line that should be connected to the (functional) coolant drain plug via a T-fitting. No clear pictures in the Op Manual.

Any ideas?

Another thing-- noticed today that the plastic Oil Filler Cap on the valve cover has bunged up threads and won't tighten. It stays put, but tends to leak a bit. Before I talk to Hoye about a new replacement I thought I'd see if anyone had a used on I could get or could offer an alternative part? 3T80U-SB 3-cylinder diesel.

--Bill

[winston]

Probably a silly question, but does your oil filler cap have an o-ring on it? If this is the right one the price is not bad. http://www.hoyetractor.com/mm5/merchant ... gory_Code=

I have that same cooling line on mine but have two side by side small inlets on the radiator. One for that hose and one for the drain valve hose. I do agree with your thinking that this hose probably serves as a block drain.

[BillH]

Same one. And for $6+change and not an obscure part, I'll get it from Hoye. Shipping would have me for lunch, so I'll combine it with my next larger order.

That extra hose does what I thought it does, then. It looks ancient and is leaking where it attaches to the radiator, so I'll fix it. And look at the abandoned drain valve and see if it's fixable...

--Bill

[BillH]

I'm a big advocate of magnetic drain plugs. I don't think that my YMG1800 (3T80U-SB engine) has them in the engine or the tansmission/hydraulic sump, so I'm inclined to add them on an upcoming oil change. Does any know what thread sizes engine drain plug and transmission drain plugs are so I can hunt up a set?

Thanks,

--Bill

[winston]

I'm pretty confident the transmission is a 14mm-1.5. Would I be my life on it? No.

Just guessing the engine drain plug is a 10mm-1.25 or could be 1.5

How is that for not help? Next time I change oil I will check mine out.

[BillH]

No problem. This is such an obscure request that it'd be a longshot for anyone to have that info. Though sometimes that is listed in partsbooks. I won't need the transmission/hydraulic oil for some time-- the previous owner changed it and cleaned the screen (no spin-on filter) before I bought it and at 6+ gallons capacity, I'll wait til the clock runs out on it. The engine oil was pretty gunky looking so he changed oil to soak up some of the sludge (so to speak) without changing the oil filter and after I have a good hot run to stir things up I've got another oil and filter change lined up. It would be nice to go magnetic on that drainplug but no big deal, I can measure the threads and get it next time.

Whilst I've got a channel open-- the throttle linkage has some adjustments, etc , that I'd like to go through and check. No problems, it's a double-check maintenance thing. Is there anything online that runs thru the adjustment?

Springtime is tractortime.

--Bill