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If it drips out there, the shaft seal to the differential is usually leaking.
It is less common for it to be the actual paper seal or liquid seal on the bowl-shaped cover to the differential.
Unless it is brake fluid and not oil, because then the wheel brake cylinder would be leaking.

Unfortunately, to fix this, the portal has to be removed.
Very roughly:
Jack up the tractor, remove the wheel, separate the cabin bearing and support the rear of the cabin,
separate the side stabilizer,
unscrew the push rod from the disc brake automatic,
[ATTACH]1785[/ATTACH] [ATTACH]1786[/ATTACH]
then remove the portal (pallet truck or workshop crane, definitely on firm, level ground otherwise it won't work).
[ATTACH]1790[/ATTACH] [ATTACH]1787[/ATTACH] [ATTACH]1788[/ATTACH]
It seems to be the right side - so also release the differential lock actuation first.
[ATTACH]1789[/ATTACH]
Then you can get to the possibly leaking spot...

[ATTACH]1784[/ATTACH]

And are you sure it is not coming from above? Because if the pressure pipe is leaking, it can damage the hydraulic cover seal (top) and then oil can run from above into the brake and then out again from below... you should clarify this first.

Best time to check the brakes and repair them if necessary.

<blockquote data-quote="Joachim" data-source="post: 24966" data-attributes="member: 2329">If it drips out there, the shaft seal to the differential is usually leaking.It is less common for it to be the actual paper seal or liquid seal on the bowl-shaped cover to the differential.Unless it is brake fluid and not oil, because then the wheel brake cylinder would be leaking. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" />Unfortunately, to fix this, the portal has to be removed.Very roughly:<ul>
<li data-xf-list-type="ul">Jack up the tractor, remove the wheel, separate the cabin bearing and support the rear of the cabin,</li>
<li data-xf-list-type="ul">separate the side stabilizer,</li>
<li data-xf-list-type="ul">unscrew the push rod from the disc brake automatic, 
[ATTACH]1785[/ATTACH] [ATTACH]1786[/ATTACH]</li>
<li data-xf-list-type="ul">then remove the portal (pallet truck or workshop crane, definitely on firm, level ground otherwise it won&#039;t work). 
[ATTACH]1790[/ATTACH] [ATTACH]1787[/ATTACH] [ATTACH]1788[/ATTACH]</li>
<li data-xf-list-type="ul">It seems to be the right side - so also release the differential lock actuation first. 
[ATTACH]1789[/ATTACH]</li>
<li data-xf-list-type="ul">Then you can get to the possibly leaking spot... 
 
[ATTACH]1784[/ATTACH]</li>
</ul>And are you sure it is not coming from above? Because if the pressure pipe is leaking, it can damage the hydraulic cover seal (top) and then oil can run from above into the brake and then out again from below... you should clarify this first.Best time to check the brakes and repair them if necessary. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" /></blockquote>

[QUOTE="Joachim, post: 24966, member: 2329"] If it drips out there, the shaft seal to the differential is usually leaking. It is less common for it to be the actual paper seal or liquid seal on the bowl-shaped cover to the differential. Unless it is brake fluid and not oil, because then the wheel brake cylinder would be leaking. ;) Unfortunately, to fix this, the portal has to be removed. Very roughly: [LIST] [*]Jack up the tractor, remove the wheel, separate the cabin bearing and support the rear of the cabin, [*]separate the side stabilizer, [*]unscrew the push rod from the disc brake automatic, [ATTACH]1785[/ATTACH] [ATTACH]1786[/ATTACH] [*]then remove the portal (pallet truck or workshop crane, definitely on firm, level ground otherwise it won't work). [ATTACH]1790[/ATTACH] [ATTACH]1787[/ATTACH] [ATTACH]1788[/ATTACH] [*]It seems to be the right side - so also release the differential lock actuation first. [ATTACH]1789[/ATTACH] [*]Then you can get to the possibly leaking spot... [ATTACH]1784[/ATTACH] [/LIST] And are you sure it is not coming from above? Because if the pressure pipe is leaking, it can damage the hydraulic cover seal (top) and then oil can run from above into the brake and then out again from below... you should clarify this first. Best time to check the brakes and repair them if necessary. ;-) [/QUOTE]

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