Dangers of too much 'oil' in gearbox -

[petery]

Dangers of too much \'oil\' in gearbox -

I've put too much fluid in my basic Hurth gearbox. Friends tell me it will cause problems - will it and why? No problem to suck it out but I'd like to know why it will cause damage.

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[oldharry]

Re: Dangers of too much \'oil\' in gearbox -

When it warms up there will be insuffient air space within the box, internal pressure increases and there is a risk of blowing out oil seals etc. Messy, potentially expensive, and the risk of the thing packing up at sea.

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[banana]

Re: Dangers of too much \'oil\' in gearbox -

the power of hydraulics will lift a thousand tons. it will break your gearbox no problem. i did it once, fist thing i noticed was unburnt fuel out the exhaust, the engine laboured and i thought there was a rope around the prop. it was a stupid thing to do as i had not looked for the level screw and assumed i had to fill the box! 'phoned my dad, he called me a prat and i let about a pint out. i read the manual from now on.

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[AndrewB]

Re: Dangers of too much \'oil\' in gearbox -

Hurth gearboxes are notorious for this. A few drops over the dipstick level, and at some point the gear will fail to engage properly and will slip.

I made the same mistake once. Consternation in a Dutch marina we were entering - had to back out under sail, no joke with a heavy steel long-keeler capable of causing a lot of damage in a breeze. The Dutch mechanic knew immediately. Two cans of beer for an evening call-out ... we got off lightly.

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[Anchorite]

Re: On the level

With the Hurth box how do you read the level: should you screw the dipstick back in (and then out again to read it), or just put the plug in contact?

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[Plum]

Re: On the level

You do not screw it back in, just poke it in the hole so it rests on the threaded section, lift it out and read the level.

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[castaway]

Re: On the level

I've come across numerous gearboxes like this with a threaded dipstick and they NEVER tell the use whether to dip it screwed in or not.

Nick

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[Neal]

The Hurth \'user\'s manual\'...

which is a sheet of A4, does say that the dip stick should not be screwed in when checking the level (that's for the HBW100 wot I used to have).

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[Heckler]

Re: On the level

all levels i have come across like this you do with it unscrewed
stu

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