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Old 08-05-09, 11:20 PM   #1
johnknappcc
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Outboard Bearings 7900's, Where to Apply Grease?

I'm getting my bike back freshly faced/chased(sp?) and I picked up my DA 7900 bottom bracket.

I'm assuming the normal grease the threads applies (there is some pre-applied to the cup threads).

As I was looking at the cups, I noticed there was a bit of grease on the inside of the cups (where the spindle will end up going) and I'm not sure if it migrated there from the way the bottom bracket is packed or if it should be there.

So, will I also end up greasing the spindle, and should I grease the inside of the sleeve between the cups?

Last edited by johnknappcc; 08-06-09 at 12:55 AM.
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Old 08-05-09, 11:38 PM   #2
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As I recall from an Ultegra BB install, the basic idea is to lightly grease all the threads and the spindle when you insert it so you don't tear the seal. This grease isn't important to bearing function - you're just allowing the parts to slide together and the bolts to torque up properly. Make sure you torque to spec.

The grease that is there is probably pre-applied to help you out. I doubt it is from the bearings which are tightly sealed.

- Mark
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Old 08-06-09, 07:52 AM   #3
une_vitesse
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good on you for getting your bb shell prepped for an out board bearing bb installation. grease is commonly used to install those types of bbs, but i've found in my experience that loktite 242 (the blue stuff) works well. it's wet when applied, so it provides lubrication for the threads and when it cures it holds the cups in place. this is especially important if your bike happens to have an italian threaded bb. if you do decide to go the loktite route, make sure all the threads are devoid of any traces of grease, and there is no need to over tighten the cups.
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Old 08-06-09, 11:09 AM   #4
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Originally Posted by une_vitesse View Post
good on you for getting your bb shell prepped for an out board bearing bb installation. grease is commonly used to install those types of bbs, but i've found in my experience that loktite 242 (the blue stuff) works well. it's wet when applied, so it provides lubrication for the threads and when it cures it holds the cups in place. this is especially important if your bike happens to have an italian threaded bb. if you do decide to go the loktite route, make sure all the threads are devoid of any traces of grease, and there is no need to over tighten the cups.
It's actually on my Schwinn Voyageur, what year is yours?

I'm thinking the grease and torque-to-spec is the first route, and since it is a voyageur, it is standard english threading.

Went from the triple to a compact double because trying to find spacers (experimentally) to use a nine speed chain (without getting chain suck on the granny/middle combo) on a triple designed for a 5 speed has proven to be annoying. The chain suck happened on my last double metric, and the Waterford factory ride, which was quite hilly, I avoided using the granny so my climbing gear turned out to be 44/21, no fun on the legs.
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Old 08-07-09, 03:13 PM   #5
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Originally Posted by johnknappcc View Post
It's actually on my Schwinn Voyageur, what year is yours?

I'm thinking the grease and torque-to-spec is the first route, and since it is a voyageur, it is standard english threading.

Went from the triple to a compact double because trying to find spacers (experimentally) to use a nine speed chain (without getting chain suck on the granny/middle combo) on a triple designed for a 5 speed has proven to be annoying. The chain suck happened on my last double metric, and the Waterford factory ride, which was quite hilly, I avoided using the granny so my climbing gear turned out to be 44/21, no fun on the legs.
sounds brutal. i've got the 85 voyageur.
4mm chainring spacers might have been the ticket (according to sutherland's)
do you still have the downtube shifters on your rig? when i took mine off, i noticed the braze ons were not like any other ones i've seen in the past.
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Old 08-08-09, 04:45 PM   #6
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nice. yours is the voyageur sp. very nice indeed. were the original wheels 630 or 622?
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