This is a standard type 9, and it doesn't look good
It seems that the case is broken and metal debris are around this area. The box was rebuild 2K miles ago and was working fine even when I stop after dissasembly.
What do you think?
Many thanks.
After a short blast I found a big oil leak from the gearbox. Today I finally take it out and found this:
This is a standard type 9, and it doesn't look good It seems that the case is broken and metal debris are around this area.
The box was rebuild 2K miles ago and was working fine even when I stop after dissasembly.
What do you think?
Many thanks.
Looks like bearing has seized and spun the outer race casing casing to brake.
The type 9 layshaft does come through the casing by design.
The shaft is then held in place by the flat face on the back of the bell housing.
The Duratec bell tends to have a hollow or pocket in the back, so a bolt is put in place like the pic below to stop the shaft moving forward.
Do you have a bolt in place?
[img]
Layshaft retaining bolt
[/img]
[Edited on 24/11/13 by big-vee-twin]
quote:
Originally posted by big-vee-twin
The type 9 layshaft does come through the casing by design.
The shaft is then held in place by the flat face on the back of the bell housing.
The Duratec bell tends to have a hollow or pocket in the back, so a bolt is put in place like the pic below to stop the shaft moving forward.
Do you have a bolt in place?
[img]
Layshaft retaining bolt [/img]
[Edited on 24/11/13 by big-vee-twin]
I undestand the layshaft come through the casing, but it seems the bearing also come in mine (it was not like that obviously.)
Could it be the bearing that support the gear cluster was placed incorrectly causing it to seized and start turning causing the casing to brake like
that (almost like the bearing has machined the casing from the inside)?
I'm preparing the wallet now 
[Edited on 24/11/13 by Nitrogeno25]
Some type 9 boxes were made as original with a heavier duty front layshaft bearing. (i.e. V6 boxes) but these had a three bolt plate holding the
bearing and a machined slot in the back of the bellhousing to accommodate the plate. Not one of those I think. BGH certainly do an uprated front
layshaft bearing, fitted flush with the front face of the box but no plate the hole for it having been machined straight through from the front.
Intended to be used with the standard bellhousing which closes it off and holds it in place. I suspect it is one of these although not necessarily
BGH, Quaife and others did them.
If it's been used with a spacer or bellhousing with the machined slot like the duratec spacer shown the bearing may have been unsupported from
the front and moved before seizing.
quote:
Originally posted by Dusty
Some type 9 boxes were made as original with a heavier duty front layshaft bearing. (i.e. V6 boxes) but these had a three bolt plate holding the bearing and a machined slot in the back of the bellhousing to accommodate the plate. Not one of those I think. BGH certainly do an uprated front layshaft bearing, fitted flush with the front face of the box but no plate the hole for it having been machined straight through from the front. Intended to be used with the standard bellhousing which closes it off and holds it in place. I suspect it is one of these although not necessarily BGH, Quaife and others did them.
If it's been used with a spacer or bellhousing with the machined slot like the duratec spacer shown the bearing may have been unsupported from the front and moved before seizing.
That looks like no other type 9 I have ever seen. If it was built like that it was a bodge to begin with. Cannot see how the bearing could damage the case to the extent visible. Honestly you have a serious issue. The case is almost certainly knackered unless it could be modified for a bigger bearing compatible with the HD front spiggot.
quote:
Originally posted by Paul Turner
That looks like no other type 9 I have ever seen. If it was built like that it was a bodge to begin with. Cannot see how the bearing could damage the case to the extent visible. Honestly you have a serious issue. The case is almost certainly knackered unless it could be modified for a bigger bearing compatible with the HD front spiggot.
I would suggest that the minimum required would be a replacement casing, layshaft, bearings, gaskets etc and a good deal of praying that the laygear assembly, gears etc are all OK.
quote:
Originally posted by Paul Turner
I would suggest that the minimum required would be a replacement casing, layshaft, bearings, gaskets etc and a good deal of praying that the laygear assembly, gears etc are all OK.