MK1 suspension bearings
Posted: 30 Dec 2006, 21:31
Having found I had excess play in my rear suspension linkage on my MK1, I decided to strip it all down & replace any worn bearings. The following list explains what bearings were found & if needed what I replaced them with. (all dimensions in mm)
1. Swingarm pivot bearings.
Originals were marked ‘TLA2012Z’, they measured 26 o/d x 20 i/d x 12 long. 2 off in each side. (4 total)
The shafts measured 20 o/d x 15 i/d x 63 long. 1 off each side. I decided not to replace the shafts as these are about £13 each from LT but instead use wider bearings that would run on the unworn area of the shafts.
Standard replacement bearings available from most bearing suppliers would be ‘HK2012’
However I chose ‘HK2018RS’. The bearings are 6mm wider than standard. The bearings also have a Rubber Seal built in, this will help keep out the crap.
There are two oil seals next to the inner bearings, measuring 26 o/d x 20 i/d, these were not worn so they did not get replaced.
2. Swingarm to ‘Dog Bones’ bearings.
Original was marked ‘17BM2425’, it measured 24 o/d x 17 i/d x 25 long. 1 off.
The shaft measured 17 o/d x 10 i/d x 39 long. 1 off
Oil seals measured 27 o/d x 17 i/d. 2 off
None of these parts were worn so they did not get replaced.
3. Shock lower to triple body.
Original was marked ‘15BM2217’, it measured 22 o/d x 15 i/d x 17 long. 1 off.
The shaft measured 15 o/d x 10 i/d x 30 long. 1 off
Oil seals measured 25 o/d x 15 i/d. 2 off
None of these parts were worn so they did not get replaced.
4. Frame to triple body.
Originals were marked ‘15BM2112’; they measured 21 o/d x 15 i/d x 12 long. 2 off. These were badly rusted & fell apart upon removal.
Standard replacement bearings available from most bearing suppliers would be ‘HK1512’
However I chose ‘HK1514RS’. The bearings are 2mm wider than standard as they have a Rubber Seal built in, this will help keep out the crap.
The shaft measured 15 o/d x 10 i/d x 36 long. 1 off. This was badly worn & needed replacing. This is about £8.50 from LT but I managed to get one machined from stainless steel at a local machine shop.
The oil seals are the ‘cup’ type that fit over the triple body; these were not too badly worn so they were not replaced.
5. ‘Dog Bones’ to triple body. (The same sizes as ‘4’ above)
Originals were marked ‘15BM2112’; they measured 21 o/d x 15 i/d x 12 long. 2 off. These were badly rusted & fell apart upon removal.
Standard replacement bearings available from most bearing suppliers would be ‘HK1512’
However I chose ‘HK1514RS’. The bearings are 2mm wider than standard as they have a Rubber Seal built in, this will help keep out the crap.
The shaft measured 15 o/d x 10 i/d x 36 long. 1 off. This was badly worn & needed replacing. This is about £8.50 from LT but I managed to get one machined from stainless steel at a local machine shop.
The oil seals are the ‘cup’ type that fit over the triple body; these were not too badly worn so they were not replaced.
The replacement bearing sizes quoted above are available at most bearing suppliers or on line at http://www.simplybearings.co.uk
These bearings were changed on my MK1, I do not know if other MK’s have the same bearings.
1. Swingarm pivot bearings.
Originals were marked ‘TLA2012Z’, they measured 26 o/d x 20 i/d x 12 long. 2 off in each side. (4 total)
The shafts measured 20 o/d x 15 i/d x 63 long. 1 off each side. I decided not to replace the shafts as these are about £13 each from LT but instead use wider bearings that would run on the unworn area of the shafts.
Standard replacement bearings available from most bearing suppliers would be ‘HK2012’
However I chose ‘HK2018RS’. The bearings are 6mm wider than standard. The bearings also have a Rubber Seal built in, this will help keep out the crap.
There are two oil seals next to the inner bearings, measuring 26 o/d x 20 i/d, these were not worn so they did not get replaced.
2. Swingarm to ‘Dog Bones’ bearings.
Original was marked ‘17BM2425’, it measured 24 o/d x 17 i/d x 25 long. 1 off.
The shaft measured 17 o/d x 10 i/d x 39 long. 1 off
Oil seals measured 27 o/d x 17 i/d. 2 off
None of these parts were worn so they did not get replaced.
3. Shock lower to triple body.
Original was marked ‘15BM2217’, it measured 22 o/d x 15 i/d x 17 long. 1 off.
The shaft measured 15 o/d x 10 i/d x 30 long. 1 off
Oil seals measured 25 o/d x 15 i/d. 2 off
None of these parts were worn so they did not get replaced.
4. Frame to triple body.
Originals were marked ‘15BM2112’; they measured 21 o/d x 15 i/d x 12 long. 2 off. These were badly rusted & fell apart upon removal.
Standard replacement bearings available from most bearing suppliers would be ‘HK1512’
However I chose ‘HK1514RS’. The bearings are 2mm wider than standard as they have a Rubber Seal built in, this will help keep out the crap.
The shaft measured 15 o/d x 10 i/d x 36 long. 1 off. This was badly worn & needed replacing. This is about £8.50 from LT but I managed to get one machined from stainless steel at a local machine shop.
The oil seals are the ‘cup’ type that fit over the triple body; these were not too badly worn so they were not replaced.
5. ‘Dog Bones’ to triple body. (The same sizes as ‘4’ above)
Originals were marked ‘15BM2112’; they measured 21 o/d x 15 i/d x 12 long. 2 off. These were badly rusted & fell apart upon removal.
Standard replacement bearings available from most bearing suppliers would be ‘HK1512’
However I chose ‘HK1514RS’. The bearings are 2mm wider than standard as they have a Rubber Seal built in, this will help keep out the crap.
The shaft measured 15 o/d x 10 i/d x 36 long. 1 off. This was badly worn & needed replacing. This is about £8.50 from LT but I managed to get one machined from stainless steel at a local machine shop.
The oil seals are the ‘cup’ type that fit over the triple body; these were not too badly worn so they were not replaced.
The replacement bearing sizes quoted above are available at most bearing suppliers or on line at http://www.simplybearings.co.uk
These bearings were changed on my MK1, I do not know if other MK’s have the same bearings.