Hymac 580C slew motor seals

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Canada Hymac 570c
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Re: Hymac 580C slew motor seals

Post #11 by Canada Hymac 570c » Tue Jun 04, 2019 6:48 am

Thanks guys. I am trying to find the seal kits before getting it out of the machine and apart. Does anyone know the model or series of these Staffa motors. I can’t seem to find any useful model number or info on the unit itself.


Jeremy Rowland
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Re: Hymac 580C slew motor seals

Post #12 by Jeremy Rowland » Tue Jun 04, 2019 2:10 pm

Dan I have spoken to Tony Flint he tells me there are two types of Staffa motor fitted on the 580C, either the B80 or the Mk7 and they are very hard to tell apart; Like Fred says he confirms that you will need a seal specialist so either Staffa themselves or get the seals made.


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Re: Hymac 580C slew motor seals

Post #13 by strontium90 » Sat Jun 08, 2019 2:15 pm

The fact that there are two types of motor doesn't surprise me...it was the same with the cross-line relief valve..I may try to do it at some stage but for general clearing as I'm using the machine for at the moment, it's not insurmountable...
Just as a side thought....what would be the effect if I used a heavier hydraulic oil...i.e. 32 instead of 46?...would it tighten things up?

Heres the welsh dragon in the nest she is building...lol
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