Retrofit sealed gearbox onto forty

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forestcreature
Posts: 10
Joined: Tue Jul 17, 2018 12:40 pm
Location: London

Retrofit sealed gearbox onto forty

Postby forestcreature » Thu Aug 02, 2018 12:42 am

Is it possible to retrofit a lip-seal gearbox (or housing?) onto an unsealed forty?

I know I read a discussion about this, but I am really sorry that I can't remember where or what the outcome was

fleetingcontact
Posts: 142
Joined: Sat Aug 15, 2015 6:47 pm
Location:

Re: Retrofit sealed gearbox onto forty

Postby fleetingcontact » Fri Aug 03, 2018 5:16 am

The water-pump housing is a different design to the fixed-drive equivalent, so if you go for it the result would have non-standard driveshaft casing and driveshaft lengths. Thus:

...cut the driveshaft casing tube to length
...cut the driveshaft to length
...drill and tap the driveshaft casing to accept a engineering stud
...mod a clutch rod to fit

And another thing - the driveshaft casing diameters are fractionally different so you may need a tube from a clutched model anyhow, which would at least save the bother of tapping the fixed-drive casing.

Or buy a clutched model.

forestcreature
Posts: 10
Joined: Tue Jul 17, 2018 12:40 pm
Location: London

Re: Retrofit sealed gearbox onto forty

Postby forestcreature » Sat Aug 04, 2018 5:31 pm

Thank you! I agree with the last sentiment then. Not that the work is too awful to consider but there seem to be enough Seagulls around!


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