My 1951 NH Red Hunter Project

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James Hickman
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Re: My 1951 NH Red Hunter Project

Postby James Hickman » Tue Dec 05, 2017 10:30 am

Time For Another Update: Forks and Steering Reassembly:

The frame is all painted and I have acquired all the parts for the steering assembly from Draganfly and others. I had very little to go on in terms of assembly, as very little was there when I acquired the bike. However Draganfly's excellent exploded diagram and much help from the AOMCC technical forum acted as my guide. I'm detailing it here in case others pass this way...

I had already fitted the lower bearing to the lower yoke – helped by putting the yoke in the freezer and the bearing in the warming oven. I’m using taper bearings – generally thought to be an improvement on the original loose balls. I fitted the cups for these to the frame, again eased by popping them in the freezer overnight before gently tapping in with a wooden block. It occurs to me that these will be very difficult to remove if I ever need to, as the inner diameter is smaller than the orifice in the frame – I would probably need to weld a piece of steel across them and knock them out using that.
1. Steering head bearing cup in place.JPG

In a similar way I warmed the upper bearing and, having inserted the steering head through the frame, tapped it down then pressed it in using the dust cover and steering head nut. I then loosened the nut and retightened it, as advised In the Owners’ Handbook, to the point where no vertical free play was apparent and another 1/6 of a turn before tightening down the second locking steering nut.
2. Steering bearings reassembled.JPG

The (all new) steering damper mechanism then went in quite easily. There had been some debate on the forum about whether the anchor plate goes between the friction plates or beneath them but I opted for the logical approach
4. Lower end steering damper mechanism in situ.JPG

The next bit was a bit of a battle. Fork legs, Upper part of steering yoke and headlamp brackets – but in what order. Lots of trial and error ensued, not helped by the fact that the new stanchions are a much tighter fit in the yoke than the old ones and I needed to prize the fitting in order to adjust the stanchions.

In the end I think the process should be:
1. Fit Top Yoke to steering head.
2. Insert Stanchion up through lower yoke until it fits snuggly under upper yoke.
3. Tighten bolts that fix stanchions to upper yoke
4. Tighten pinch bolts to fix stanchions in place.
5. Remove all three bolts now securing top yoke and remove.
6. Place headlamp holders over stanchions.
7. Reapply upper yoke and fix down to steering head.
8. Add 1/3 pint oil to each stanchion and tighten upper bolts

8. Inserting Fork Legs.JPG

11. Adding Headlamp Holders.JPG

This all went OKish, although frustratingly resulted in some chips to the new paint and was complicated as the headlamp holders didn’t seem to fit well, so I had to repeat several times with adjustments each time until I got it right. The whole process was not helped by the fact that the adaptor in the upper end of the left stanchion has a very dodgy thread. I have ordered some more from Draganfly and will replace them when available. I’m also not sure why the headlamp holders don’t slide properly into the top yoke with a bit of overlap to allow for this. In the end I had to leave out the washers that are depicted between these and the anti-rattle rubber fittings – I can’t see what purpose they serve...

If I've done anything majorly wrong please tell me!

P.S. Does anyone know how to stop the forum rotating images...?

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James Hickman
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Re: My 1951 NH Red Hunter Project

Postby James Hickman » Tue Jun 26, 2018 8:56 pm

I'm afraid I've rather lapsed from posting updates on the forum - but I am keeping a journal and will upload it once it is on the road. In the meantime I think this represents progress... :D
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[ Play Quicktime file ] For Forum.mov [ 8.46 MiB | Viewed 859 times ]


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Steven.Carter
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Re: My 1951 NH Red Hunter Project

Postby Steven.Carter » Wed Jun 27, 2018 6:29 am

Well done, it's very satisfying when she fires for the first time

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James Hickman
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Re: My 1951 NH Red Hunter Project

Postby James Hickman » Fri May 17, 2019 12:19 pm

So, quite a lot of time has passed - but it is up and running and on the road!

Thank you so much for all your replies to my forum posts and all the advice you've given - couldn't have done it without you!
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IMG_3068.JPG
IMG_3064.JPG

Simon.Gardiner
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Re: My 1951 NH Red Hunter Project

Postby Simon.Gardiner » Fri May 17, 2019 1:01 pm

Looks fantastic, James - hope you're enjoying it!

SG
'55 Huntmaster, '56 VH, ' 51 VH, '80 R100RT, '00 Sprint ST (but all those Ariel parts can only make one running bike...)

Mick D
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Re: My 1951 NH Red Hunter Project

Postby Mick D » Fri May 17, 2019 2:10 pm

Hi

Looks very nice, but are you sure the timing / mixture are correct? that exhaust is very blue.

Regards Mick

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James Hickman
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Re: My 1951 NH Red Hunter Project

Postby James Hickman » Fri May 17, 2019 4:49 pm

Yes - I had spotted that...
There was a leak where the exhaust wasn’t tightened properly and mixture probably a bit weak.
It adds character...

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Leejm
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Re: My 1951 NH Red Hunter Project

Postby Leejm » Sun May 26, 2019 8:02 pm

Your bike looks great well done. One thing bothers me as mention before is the very blue exhaust!! My nh I've been up too 80 mph and the exhaust is a very pale straw colour. Your clearly got alot hotter than mine ever did.
1948 NH, BSA D10 SPORTS. 1953 VHA, 1951 KH rigid project.

john.whiting
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Re: My 1951 NH Red Hunter Project

Postby john.whiting » Tue May 28, 2019 12:44 pm

not necessarily ,,,the new chrome /less toxic salts produce a quite different result to the older hexavalent chromic acid process.


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