Looking for information on wheels for Ym 169(d)

Jsiler155 · Oct 25, 2024

I looking to get new tires for my yanmar ym169(d). My tires have dry rotted and can’t be fixed. The wheels on it don’t match the specs set out in the Manuel. The spec are below

But what I have is different. Should I get replacement tires and not worry about finding new wheel and tires? Any advice?

0T2261\| 103. TIRES(U.S.A. ONLY;FOR YM169D) (A)-YM169 (B)-YM1690
REF.		LEV. PARTS NO.	(C)- DESCRIPTION
		YTI346-14800	TIRE SET, FRONT
		YTI346-14810	TIRE ASSY, FRONT
		YTI346-14830	TIRE 6-12 (TUBELESS)
		YTI346-14710	WHEEL 12 X 5JA
	N w	YTI346-14820	TIRE ASSY, FRONT
		YTI346-14830	TIRE 6-12 (TUBELESS)
		YTI346-14710	WHEEL 12 X SJA
		YTI345-34900	TIRE SET, REAR
	2	YTI345-34910	TIRE ASSY, REAR
10		YTI345-34920	TIRE 8.3-16(TUBELESS
11		YTI345-34810	WHEEL 16 X 16LB
12	2	YTI345-34950	TIRE ASSY, REAR
13		YTI345-34920	TIRE 8.3-16(TUBELESS
14		YTI345-34810	WHEEL 16 X 16LB

bmaverick · Oct 26, 2024

With any 4WD machine, you need to have a matching OD ratio with the rear tires to the front tires.
And in the matched ratio, there is a LEAD and LAG you need to follow. If you do not follow this closely, you can in time strip the kingpin and gears in the front 4WD wheels. Much of the time, when replacing 4WD tires, you replace ALL of them at the same time on the tractor or wheel-loader.

There has been extensive discussions on this topic over the years on the YTOG. The conclusion is, replace all tires to be evenly match to prevent these 40+ yo gears from failing. I had debated long and hard whether to have 2WD or 4WD. There were more pros for 2WD.

Look over this LEAD and LAG article.