1500 D knuckle seal problem

Citrus Bob · Mar 16, 2008

I've been reading the Yanmar forum for six months now but this is my first post. Congratulations to all the posters for putting together a really useful site! Now here's my problem.

The right front wheel fell off of my green 1500 D when the hub broke off where it is welded to the stub axel. I removed the knuckle (#39 in Hoye's diagram, below) at the gear case (#34) and I'm replacing the knuckle seal
(#26) along with the stub axel and a few other parts. The problem is, the old seal is petrified or glued on to the gear case, and it doesn't want to budge. The parts of the seal that I can reach are coming off in tiny chunks, but the seal has an outer flange that fits into a narrow groove machined into the gear case that I can't reach at all; I can't even get a knife blade in there to try to scrape it out.

Can anyone suggest an easy way to get what's left of the knuckle seal out of the gear housing? Could I burn it out with a butane torch, or would that damage the gear case? It would be easier to work on getting the seal off if I removed the gear case from the axel tube - will the gear case pull off without first removing the gear and bearing from the end of the axel shaft?

I'd appreciate any suggestions you all can offer.

Here's the link to Hoye's diagram.

4WD_EXTERNAL_G: Yanmar Tractor Parts

Bob

HoyeTractor · Mar 16, 2008

Welcome to the forum!

I can't quite picture how you are trying to get the seal out. It sounds like you are trying to pry on the thin lip at the bottom of the seal. Normally we just stick a big screwdriver/small prybar in under the inside top (if looking down at the gearbox as it is on the tractor) of the seal & a quick bump pops it right out.

Aaron
Parts@HoyeTractor.com
(940)592-0181

Citrus Bob · Mar 19, 2008

Thanks for the reply, Aaron.

It looks like I've just been scraping rubber off the metal base of the old seal, thinking the metal part of the seal was the gear case. So I tried prying the old seal out by placing a 12 inch screw driver up under the metal rim of the seal and pushing up against the gear case. Couldn't budge it. I'll try a bigger pry bar or maybe a puller tomorrow.

Bob