Rusty nuts

For all that relates to both Armstrong MT 500 and Harley Davidson MT 350
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Franc
Posts: 1988
Joined: Sun Mar 22, 2009 4:20 pm
Location: Forest of Dean

Rusty nuts

Post by Franc » Tue Mar 24, 2020 5:19 pm

Having bought an MT that was completely seized, I have set about occasionally tinkering with it when I'm bored, mainly just undoing, cleaning, lubricating and reassembling it bolt by bolt.
I occurred to me, when looking at your MT, if you had to strip it down, which bolt, or bolts, would you most dread tackling, and for what reason?
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lardmarc
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Location: Newton Abbot

Re: Rusty nuts

Post by lardmarc » Tue Mar 24, 2020 6:03 pm

Exhaust studs. Nothing else seizes.
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“Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so.” (Adams, 2009).

Wirralman
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Joined: Fri Jan 16, 2009 9:45 am
Location: Wirral, Merseyside

Re: Rusty nuts

Post by Wirralman » Tue Mar 24, 2020 6:10 pm

I well remember the first time I wanted to get access to the clutch.

Having removed the cambelt lower pulley I tried to undo the nut behind it having fitted crank locking bolt, engaged 1st gear and choked the rear wheel. I had the correct socket and fitted more and more extension bars, when they reached 3ft the nut eventually started to turn. I hadn't thought of loctite and the need for heat to soften it.

On the second one I did, the nut came off easily, but that had heat which was allowed so soak- the combination of soft loctite and a nut which would have expanded just a tad made a huge difference

I have never needed to remove the exhaust manifold, but that is a much feared job 😮
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MTBrown
Posts: 49
Joined: Wed Jun 05, 2019 5:33 am
Location: Normanton

Re: Rusty nuts

Post by MTBrown » Tue Mar 24, 2020 7:29 pm

Swinging arm spindle - if rusted on to bearing journals then an absolute nightmare to extract. Been there with a Honda but not an MT!
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Laurence
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Location: Tunbridge Wells

Re: Rusty nuts

Post by Laurence » Tue Mar 24, 2020 8:36 pm

lardmarc wrote:
Tue Mar 24, 2020 6:03 pm
Exhaust studs.
And those cross head screws that hold the cover on the front brake master cylinder.... once rusty they round off in no time
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#skippy1970
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Location: Plymouth

Re: Rusty nuts

Post by #skippy1970 » Wed Mar 25, 2020 10:50 am

Laurence wrote:
Tue Mar 24, 2020 8:36 pm
lardmarc wrote:
Tue Mar 24, 2020 6:03 pm
Exhaust studs.
And those cross head screws that hold the cover on the front brake master cylinder.... once rusty they round off in no time
Try a JIS screwdriver they fit like a glove
No more mullered screw heads :D
2 x
If my brain was to get any smarter it would become self aware and take over my body

MT350 GL36AA

Wirralman
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Joined: Fri Jan 16, 2009 9:45 am
Location: Wirral, Merseyside

Re: Rusty nuts

Post by Wirralman » Wed Mar 25, 2020 12:05 pm

#skippy1970 wrote:
Wed Mar 25, 2020 10:50 am
Laurence wrote:
Tue Mar 24, 2020 8:36 pm
lardmarc wrote:
Tue Mar 24, 2020 6:03 pm
Exhaust studs.
And those cross head screws that hold the cover on the front brake master cylinder.... once rusty they round off in no time
Try a JIS screwdriver they fit like a glove
No more mullered screw heads :D
I once tried a well fitting screw driver which had a hexagonal shaft. I soaked the master cylinder head screws with releasing fluid and put 6 inch spanner on the shaft but even with that leverage they wouldn't move.

Solution- a punch tapped into the screwhead, then angled so that the next blow turned the screw. New screws required, but at least I could get to the master cylinder and fit the parts from the refurb kit.

At the caliper end , new ball bearing required as the exposed side of that was rusty. I suspect that the brake fluid hadn't been changed for a very long time.

Rusty nuts, screws, ball bearings, all part of MT maintenance fun 😊
1 x

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hounddog
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Location: Portsmouth, Hampshire

Re: Rusty nuts

Post by hounddog » Wed Mar 25, 2020 1:08 pm

I have undone most of the bolts and screws on mine over the years.
They are better on the MT than a lot of bikes I have had in the past . I was always using an impact driver on a Honda , rarely if ever on the MT

I have had to drill out , one screw joining the crankcase halves together , and the lower mounting bolt for gun box.

I have been lucky with exhaust studs , just use lots of penetrating oil over several days before trying to undo , maybe a bit of heat , and approach gently

The front sprocket nut can be quite tight to remove .

Rear sprocket bolts can also be troublesome , althogh mine were fine

Ian
1 x
Ian
------------------------------------

Harley Davidson MT350e
Armstrong MT500e
Armstrong MT500 - next project

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#skippy1970
Posts: 350
Joined: Sun Jun 21, 2015 2:32 pm
Location: Plymouth

Re: Rusty nuts

Post by #skippy1970 » Wed Mar 25, 2020 1:13 pm

There are three types of cross type screw fixings
Philips
Pozidriv
JIS

If you use a Philips screwdriver on a say a jap carburettor it will try to cam out of the screw fixing
It is designed to do this
If you use a JIS screwdriver the difference felt is quite significant

This is why you see so many witness marks on carburettors :roll:

And why is that seized bolt always in the most inaccessible place :?
1 x
If my brain was to get any smarter it would become self aware and take over my body

MT350 GL36AA

Pewter
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Joined: Thu Jun 18, 2015 7:48 pm
Location: Melton Mowbray

Re: Rusty nuts

Post by Pewter » Wed Mar 25, 2020 6:10 pm

The allen head bolts holding the discs on are the worst fittings I’ve encountered. A good friend helped me by heating them with a welding gas torch before undoing them.
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