Author Topic: Fill bung on final drive housing  (Read 4267 times)

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Offline thetrecker

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Fill bung on final drive housing
on: October 11, 2015, 04:47:04 PM
Hi All,
Checked the oil level in the final drive earlier in the year, before a big trip to Assen in Holland and upon removing the fill bung it sheared in half!, the thread part broke away from the cap part. Could not believe how easy it happened. I found a 20mm nylon bung in the garage and used it temporary. It was fine for the trip and upon return I ordered a new one expecting it to take a week to come in. The dealer ( Belfast Honda) had 3 in stock! Seems its a common problem for them also, his comment was it is made from a chocolate/cheese mix!
Part number is 41530MGE000 and costs £19.03stg plus vat 20%.
Just take care.
Thetrecker. Sometimes your the bug and sometimes your the windshield.

#1

Offline Nickel

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Re: Fill bung on final drive housing
Reply #1 on: October 12, 2015, 03:06:24 PM
It's also my second one yet.

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Offline GADGET

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Re: Fill bung on final drive housing
Reply #2 on: October 12, 2015, 05:46:17 PM
So, what do you reckon, overtightened on last install?
I see it gives a torque value of 8 Nm in the workshop manual (12Nm for the drain bolt)

#3

Offline thetrecker

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Re: Fill bung on final drive housing
Reply #3 on: October 12, 2015, 08:50:59 PM
Hi Gadget,
I'd say it was the first time it was touched from new, it was on removal that it sheared, so assume it was torqued correctly at the factory. Its hollow in the centre with a wall of about 3mm so its easily snapped. I'll keep my nylon bung for the future
Hey Nickel, how did yours shear?
Tom
Thetrecker. Sometimes your the bug and sometimes your the windshield.

#4

Offline Nickel

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Re: Fill bung on final drive housing
Reply #4 on: October 13, 2015, 09:13:05 AM
It happened at the dealers with the first change of the oil in final drive. And the mechanic wasn't a newbie  :084:

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Offline GADGET

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Re: Fill bung on final drive housing
Reply #5 on: October 13, 2015, 09:57:34 AM
So if a nylon bung is good enough, them 8 Nm is too much perhaps

#6

Offline MotoGpNick

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Re: Fill bung on final drive housing
Reply #6 on: October 13, 2015, 01:03:11 PM
Its not a pressurised casing so you do not need anything that special, Pro-Bolt probably do something that will fit and look the dogs !!
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Offline thetrecker

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Re: Fill bung on final drive housing
Reply #7 on: October 14, 2015, 04:54:39 PM
Yea, any 20mm  thread bung will do, its only the fill bung, not as important as the drain bung, I just had a quality nylon one from an EX rated electrical fitting, that I used.
There is no vent that I can see in the casing and there is a suck in of air in when I open the bung, How do you know its not a pressurised casing Nick?
Thetrecker. Sometimes your the bug and sometimes your the windshield.