Spindle shims for 1601D

[agirlandhertractor-HT]

Unexpected problem, the shim between bearing 24101-063074 (#27 on parts diag) and main bevel gear (#19 on parts diag) is badly damaged, as in some of it is missing. There are supposed to be two per parts diagrams.

Here's the parts diag with part numbers
194158-14180 shim outer
194130-26460 shim inner "PTOO ... 0.3"
The image is very blurry and I'm having a hard time making out the katakana in the parts descriptions, not that it would help (I can read Japanese)
Regardless, a web search with those part numbers did not turn up anything that looked like shims.

I also did some digging around on Japanese auction sites and that was also fruitless. I don't know if there are enthusiast communities for these old tractors there like we have here in the states.

So, what do I do here?

I can't put the broken/mangled shim back in. No idea what the thickness should be.. maybe one of the shims was .3mm, but even that is a guess. The other shim did not have any measurements in the description.

Any help appreciated.

 

[Jim.ME]

Use a micrometer to measure the thickness of the shims. You can purchase shim stock of that thickness and make them, or you might be able to find some precut to the dimensions. McMaster Carr and other industrial supply houses are places to check for shims or shim stock.

Adding your general location to your profile so it shows, might yield some other places to check near you.

 

[winston-HT]

I agree with JIm. https://www.harborfreight.com/search?q=caliper tool

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[agirlandhertractor-HT]

Sorry, ya'll might have overlooked the bit where one of the shims is completely missing, and the other has been worn down to nothing and is incomplete. I have nothing to measure as far as thickness.

 

[agirlandhertractor-HT]

Not super sure what thickness shim I'll want to use, but I ordered an assortment of 35mm ID x 45mm OD shims from McMaster in sizes including .1, .2, .3, .5, and 1mm thicknesses.

Obviously the tractor was running without at least one shim for who knows how long, and the remaining shim was all but destroyed. May have to use a best guess. One of the shims will be .3mm probably, from the part description. Not sure what the other is, but it did have a different part number so it's possible or even probable that one is not .3mm

 

[winston-HT]

You may want to read up in this manual. Not exactly like yours but will point you in the right direction. I think info will e in chapter 4.

YANMAR YM169 SERVICE MANUAL

www.tractorforum.com

 

[Jim.ME]

I have generally found the number of shims shown in a parts list often is the number recommended to have on hand so that you have a selection for setting clearance/backlash (or preload) and may not be the actual number of shims needing to be installed when making the final adjustments. I think the selection from McMaster should work for you.

 

[agirlandhertractor-HT]

So I am pretty sure I have too much backlash. When I move the spindle back and forth (rotationally, spinning right then spinning left) it feels like a lot more movement than should be. There is no side to side play as with a worn/bad bearing.

Too much backlash on the spindle would make sense since either the PO didn't install both shims or the shims were worn and/or completely destroyed.

The bearings feel silky smooth.

I'm not entirely sure how to measure backlash on the bench. The YM169D manual may have gone into that in another area but it's an image based PDF, so I can't search for text.

 

[agirlandhertractor-HT]

I have generally found the number of shims shown in a parts list often is the number recommended to have on hand so that you have a selection for setting clearance/backlash (or preload) and may not be the actual number of shims needing to be installed when making the final adjustments. I think the selection from McMaster should work for you.

The YM1601D Parts Diagram for the front shaft shows QNT 2 shims installed on the shaft. This shows there are two shims required for this application. As mentioned in my earlier reply, these two shims have different part numbers so it's likely they are not the same thickness. One shim is likely .3mm from the part number desc. The second part number desc is too blurry for me to adquately read the katakana, but I don't see a numeric measurement.

s

 

[agirlandhertractor-HT]

I may have a copy of the parts book in box, it may have a little better resolution to read the katakana part description of part #22 in the diagram above. I can make out a few of the letters but a couple are too blurry

シム・・・フアイナルギ・・・

with the ellipses as unknown/too blurry
The first two are shi and mu, or shimu, which is shim.

 

[Jim.ME]

The YM1601D Parts Diagram for the front shaft shows QNT 2 shims installed on the shaft. This shows there are two shims required for this application. As mentioned in my earlier reply, these two shims have different part numbers so it's likely they are not the same thickness. One shim is likely .3mm from the part number desc. The second part number desc is too blurry for me to adquately read the katakana, but I don't see a numeric measurement.

View attachment 105856s

I do not disagree that they show two different shims. My point is that often when assembling and adjusting one finds the number and thicknesses of shims may vary from what is shown in a parts book, especially when rebuilding components that have been in service. Wear on parts being reused may require increasing the number or thickness of shims to get the correct setting. The selection you ordered should give you the ability to make the adjustments needed. When you are done the number of shims you use to get the correct adjustment, may not be just like what the book shows. The final setting is your goal, not having just those two shims, exactly like the book shows.

 

[winston-HT]

Not rocket science, just make sure you have a little backlash.

 

[agirlandhertractor-HT]

Appreciate both of your input, will update when I have shims and a little time to get back to the shop.

 

[wore out]

Not rocket science, just make sure you have a little backlash.

Yep, .1mm to .3mm of gear lash = about eleven thousandths of an inch "rattle" between the meshed gears, NOT a whole lot, but not binding, either!