Nortrac 35XTD final drive removal

[Mc55806]

Hello All,
Long time reader 1st time poster.
I’m looking for some guidance on final drive removal on a Nortrac 35xtd.
I’m in the process of replacing the Bull gear, axle and semi gear after the PO ingested a Rock in late 2019 and parked it.
The semi gear is pretty short and the way it looks it only reaches back into the rectangle cover area so do I have to go far enough back to just remove the final drive or do I have to go deeper?

 

[Bob Rooks]

Greetings, and welcome.
Before I go further, do you have a parts manual?

 

[Mc55806]

I have the operators and parts manual from the Northern Tool website.

 

[Bob Rooks]

I have the operators and parts manual from the Northern Tool website.

Great! I have the manufacturer's (Yuchai) manual and I'm not sure if they're the same, but on page 61 there is an exploded view of the final drive housing, and on page 58 there is a sequence drawing of the final drive gears and bearings. This is as deep as you should need to go. Going into the steering compartment (item 27 on page 61) will be necessary to remove six bolts (item 3 on page 61). In any event it will be necessary to drop the track and wishbone, and pull up the ROPS and saddle tank.

 

[Mc55806]

Great! I have the manufacturer's (Yuchai) manual and I'm not sure if they're the same, but on page 61 there is an exploded view of the final drive housing, and on page 58 there is a sequence drawing of the final drive gears and bearings. This is as deep as you should need to go. Going into the steering compartment (item 27 on page 61) will be necessary to remove six bolts (item 3 on page 61). In any event it will be necessary to drop the track and wishbone, and pull up the ROPS and saddle tank.

Thanks! So the splined end of the semi gear with the nut slips into the clutch/brake hub?

 

[Mc55806]

So after checking with my manual none of the pages or items align with yours. See attached pic. I drew arrows pointing at 3 of the 6 bolts that needed to be removed from the inside of the steering housing and is the wishbone the item in the lower right of the image attached?

 

[Bob Rooks]

Thanks! So the splined end of the semi gear with the nut slips into the clutch/brake hub?

Yes. I have actual pics of this procedure but can't find them. The wishbone is the wrap-around frame that supports the dozer blade.

 

[Bob Rooks]

The bolts you pointed out are inside the steering compartment. This is how far in you need to go.

 

[Mc55806]

Great and Thanks Bob. I'll update when I dig deeper which should be this coming weekend , this crazy mild winter so far has been nice working outside on this. Dozer is about 75 miles from my house but 1 mile from our property.

 

[Mc55806]

Update:
FD is off but it was a challenge. So I have a question. Does the undercarriage frame rail stay attached with part 27 in attached image? Is part 27 internally threaded? I was able to loosen the other side clamp for the swing shaft and get enough movement to get the FD removed but it was a challenge.

 

[Bob Rooks]

Hindsight being 20/20, it may have been easier, and even faster, if both tracks were dropped and both swing shaft caps dropped, and just rolled the whole track frame assembly forward, with the wishbone still connected. This came as an epiphany while looking at your pic . No, item 27 is not threaded.

 

[Mc55806]

I dropped both tracks to get as much slack as possible. How do the swing shafts detach from the under carriage frame. I pulled the 4 bolts in the cap and only saw grease inside. Manual doesn’t show a snap ring or key so I’m stumped.

 

[Bob Rooks]

I have never pulled that shaft, so can't say. But my parts manual suggests they are threaded in.

 

[Mc55806]

Interesting! Is it Possible
To get a scan of your Manual? Or have you seen a Yuchai manual online?

 

[Bob Rooks]

Interesting! Is it Possible
To get a scan of your Manual? Or have you seen a Yuchai manual online?

This is the Yuchai factory parts manual that came with my machine. The "RT" stands for rubber tracks.

 

[Mc55806]

Bob,
That’s awesome and thank you very much for the parts manual.

 

[Mc55806]

Also I have to ask if the Partsmanual is that thorough how much info is in the service or operators manual. The complete operators manual is 74 pages and the parts manual is also 74 pages supplied Nortrac.

 

[Bob Rooks]

There is no service/repair manual. I was thinking of writing one years ago but life got in the way.
The Yuchai operator's manual is 36 pages and the parts manual is 112 pages.
The operator's manual covers basic maintenance procedures and adjustments.