1 staburag NBU 30 PTM after 2000 km/1250 miles is brown powder Sat Jun 20, 2020 11:33 am
oote
active member
Hi,
As the previous clutch plate was not properly installed/aligned on my 1985 k100rs it ruined the gearbox input shaft teeth. I replaced clutch-plate and gearbox with an used one and greased it with Staburags NBU 30 PTM , not to much not to little… After 2000 km/1250 miles I had again problems with downshifting. I was afraid there is again a clutch problem ! And yes all the Staburag had become a dry brown powder by the clutchplate/gearbox. See images. ( Luckily no damage to the teeth of clutch plate and gear box.)
I used the same Staburag on the cardan when I had installed the other clutchplate and gearbox. On the cardan all was looking good as I was thinking maybe the Staburag grease is fake. Checked where I bought it - an official bmw dealer. Real Staburag NBU 30 PTM ! I talked to some mechanics around here and they suggested heat did make the Staburag to powder.
Although you see some of the brown powder I have no slipping clutch. Clutch cable play is also good. There was also no burn smell when removing the gearbox. All looked clean and normal on the inside of the clutch housing. Gearbox also no problem. No clucks clinks when shifting and resistance when rotating with my hand. Greased again and put it all together Down shifting is smooth again.
How can there be an overheating by the clutch/gearbox ? I am just worried that 2000 km/1250 miles later I am back to the same problem. Has anybody an idea why the Staburag went to powder ? Thanks for your suggestion.
Images
https://i.servimg.com/u/f39/20/23/00/85/img_2014.jpg
https://i.servimg.com/u/f39/20/23/00/85/img_2013.jpg
https://i.servimg.com/u/f39/20/23/00/85/img_2015.jpg
As the previous clutch plate was not properly installed/aligned on my 1985 k100rs it ruined the gearbox input shaft teeth. I replaced clutch-plate and gearbox with an used one and greased it with Staburags NBU 30 PTM , not to much not to little… After 2000 km/1250 miles I had again problems with downshifting. I was afraid there is again a clutch problem ! And yes all the Staburag had become a dry brown powder by the clutchplate/gearbox. See images. ( Luckily no damage to the teeth of clutch plate and gear box.)
I used the same Staburag on the cardan when I had installed the other clutchplate and gearbox. On the cardan all was looking good as I was thinking maybe the Staburag grease is fake. Checked where I bought it - an official bmw dealer. Real Staburag NBU 30 PTM ! I talked to some mechanics around here and they suggested heat did make the Staburag to powder.
Although you see some of the brown powder I have no slipping clutch. Clutch cable play is also good. There was also no burn smell when removing the gearbox. All looked clean and normal on the inside of the clutch housing. Gearbox also no problem. No clucks clinks when shifting and resistance when rotating with my hand. Greased again and put it all together Down shifting is smooth again.
How can there be an overheating by the clutch/gearbox ? I am just worried that 2000 km/1250 miles later I am back to the same problem. Has anybody an idea why the Staburag went to powder ? Thanks for your suggestion.
Images
https://i.servimg.com/u/f39/20/23/00/85/img_2014.jpg
https://i.servimg.com/u/f39/20/23/00/85/img_2013.jpg
https://i.servimg.com/u/f39/20/23/00/85/img_2015.jpg
Last edited by oote on Sat Jun 20, 2020 11:47 am; edited 1 time in total (Reason for editing : images links)