Hurth HBW15 RV Oil leak.

[celandine]

I have an irritating oil leak (ATF) on my Hurth 15 RV gearbox. I have not yet managed to see where it is leaking from, but presumably it is from one of the input/output seals. Has anyone experience or advice on tackling this job? It is the version with the extension for the V. drive attached. Thanks.

 

[AndrewB]

Assume you have checked the drain plug. It's the only place I've ever had a leak from a Hurth HBW 100 or 150.

 

[celandine]

Assume you have checked the drain plug. It's the only place I've ever had a leak from a Hurth HBW 100 or 150.

Oh, that it should be that simple. I shall certainly check that now that you mention it, but it only seems to leak whilst under way - so probably not that.

 

[earlybird]

A Hurth HBW50 of mine developed an irritating ATF leak from the input shaft seal. Replacement of the seal was straightforward once the 'box was separated from the flywheel housing.

 

[celandine]

A Hurth HBW50 of mine developed an irritating ATF leak from the input shaft seal. Replacement of the seal was straightforward once the 'box was separated from the flywheel housing.

Thanks for that. Was it a simple matter of re-inserting the gearbox spline when putting it back together?

 

[earlybird]

Yes, engine was a Beta. The gearbox was bolted to the fly-wheel cover, which had to be separated from the engine to access the bolts, so a fair bit of work. The splined input shaft slid out of the drive plate on the flywheel. The oil-seal was under a retaining plate held by 4(?) small set-bolts, no further dismantling was needed.

 

[doug748]

Also check the refill cap and any dip tube for unless the seals are good, and fully home, they will leak.