Interstate hinged seat original install

p400 · Apr 30, 2019

I seem to have all the parts from Andover - hinged seat, hinge, spacer, bolts, washers, nuts, cover plate, cable, etc.

I need help putting all the correct pieces, in the correct order, on the left hand upper shock bolt...maybe both upper shock bolts.

The parts book shows the lipped washers (28) as a quantity of 4 as if being used on both upper shock bolts.............a pair of lipped washers and a spacer is added to the left shock bolt?
and these pieces clear the seat on the left side?
or they are not used?
Thanks

L.A.B. · Apr 30, 2019

My Mk3 doesn't have the lipped washers on the LH bolt and would serve no purpose if they were.

lazyeye6 · Apr 30, 2019

The diagram you supplied seems to be for the frame prior to the Mark III
with the hinged seat.

L.A.B. · Apr 30, 2019

lazyeye6 said:
The diagram you supplied seems to be for the frame prior to the Mark III
with the hinged seat.

Although not completely accurate it is the diagram from the Mk3 parts book.
https://andover-norton.co.uk/en/shop-drawing/138/frame-and-fittings-stands

dobba99 · May 1, 2019

The diagram shows the arrangement for the right (seat lock) side. The left (hinge side) has spacers, a nut, and washers to position the seat knob, so that allows the seat to hinge up without interfering with the knob. Almost every MK3 i have seen has the marks on the seat trim that shows where the seat trim has rested on the knob.
Seat fitting... now there hangs a tale. Every pattern seat i have seen/dealt with doesn't fit. Needing all brackets cutting off, remaking/ welding in position. I hope your AN seat is better.

p400 · May 1, 2019

So i have the new Andover Norton Mk3 Interstate hinged seat installed .
There is no clearance for the usual knurled knob to be installed.
I have used a slightly wider spacer for the upper shock mount bolt.

Anyone have this system in original to show, with a picture, how it works please.
Mk3 seat tilted open and knob installed.

gortnipper · May 1, 2019

I would just put a nice stainless or chrome dome nut on there and be done.

L.A.B. said:
The MkIII seat hinge fits onto an extended outer shock plate on the MkIII frames.

L.A.B. · May 2, 2019

p400 said:
Anyone have this system in original to show, with a picture, how it works please.
Mk3 seat tilted open and knob installed.

Firstly, I'd say the wider spacer is in the wrong place and the normal spacer goes between the hexagon and the knob (mine has two washers instead of the spacer)?

There should be a seat check wire 06.5623 that prevents the seat opening too far?
https://andover-norton.co.uk/en/shop-details/16586/seat-check-wire

When open to the limit of the check wire the 06.6254 rubber hinge cover rests against the seat knob.

Opening the seat wouldn't normally involve loosening the seat knob.

p400 · May 2, 2019

Lets see the install of the seat cable please.
i have installed the AN seat cable and if shortened, the seat will not stay up on center stand .
maybe it (the seat cable) is for use with side stand?

where is OEM frame attachment (picture or drawing)?
where is OEM seat attach (picture or drawing)?
cable length eye to eye center ?

L.A.B. · May 2, 2019

p400 said:
Lets see the install of the seat cable please.
i have installed the AN seat cable and if shortened, the seat will not stay up on center stand.
maybe it (the seat cable) is for use with side stand?

Mine suffers from the same problem (Roadster) although the hinge fittings are the same.
It needs to be on the side stand for the seat to stay open but it's already at the limit of opening, any more and the knob would begin to dig into the rubber cover.

p400 said:
where is OEM frame attachment (picture or drawing)?

The only suitable attachment point as far as I'm aware is the small hole in the inner shock plate. The self-locking nut isn't fully tightened so the end fitting can swivel as necessary when the seat closes.

p400 said:
where is OEM seat attach (picture or drawing)?

p400 said:
cable length eye to eye center ?

Approximately 11 1/2".

MichaelB · May 2, 2019

Now I remember why I disliked the hinged seat on my Mark 3.
Changed it out to a Mark 2 seat....

But then again, that's not original...

Carry on....

Interstate hinged seat original install

p400

L.A.B.

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lazyeye6

L.A.B.

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dobba99

p400

gortnipper

L.A.B.

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p400

L.A.B.

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MichaelB

"Sons of Arthritus"

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