Service The Bike Headset On A Threaded Steerer
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- čas přidán 8. 10. 2014
- A bike headset on a threaded steerer needs to be serviced once a year. This involves taking the assembly apart, cleaning, inspecting, relubricating and reassembling. If your bike has sealed cartridge bearings you don't need to service it until it stops working correctly but you may need to take it apart once to find out what kind of bearings it has. If the bike is used in dirty conditions, gets washed a lot or has no front-mudguard underneath the fork it may need to be serviced and regreased more often.
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Step 1 - Unlock
With the bike on the ground, loosen the lock-nut.
Pro Tip
It may be necessary to disconnect the front brake cable in order to remove the handlebar stem.
Step 2 - Disassemble
Put the bike in a stand remove the front wheel(link). Put a strap under the fork crown and around the down-tube. Unclamp and remove the handlebar stem, loosen the lock-nut, remove it along with any washers, cable hangers etc. taking note of the order in which the parts come off. Unscrew the adjustable race. Look out for rubber seals and note which way they go up.
Step 3 - Disassemble The Top Race
Remove the balls or rollers. They may be held in a clip or rolling free. If the balls are free count how many there are. Some may stick to the top race so make sure you don’t lose any.
Pro Tip
Most modern bike headsets have sealed bearings. These are in the form of a ring shaped cartridge. They can’t be serviced. If they look OK, turn freely and don’t have any ‘play’, reassemble the bike headset. If they need to be replaced you need to match them exactly. Tap them out with a screw driver. Take note of any writing on the cartridges and/or take them to a bike shop. You can make a ‘press’ to push the new cartridges in using a length of threaded rod and some big washers. Make sure you press on both the inner and outer rings of the cartridges, otherwise the force may damage the new bearings. In some cases the old bearings are useful to help push the new cartridges in.
Step 4 - Disassemble The Bottom Races
Once you’ve undone the top you can carefully undo the strap while supporting the forks and take the bottom race apart, there may be a rubber seal, note it’s position.
Pro Tip
If you have the bike in a stand you can turn it upside down so the forks can’t fall out.
Step 5 - Clean And Inspect
Clean the balls or rollers and the races with degreaser. Inspect the races for signs of uneven wear or roughness. Changing the balls for new ones of exactly the same size - take an old one to the shop as a sample - will prolong the life of the races. Balls in a clip are easier to handle but if you use loose balls you can fit more in so each one carrys less load. If the races are rough or badly worn the whole bike headset needs to be replaced.
Step 6 - Grease The Bottom
Fill one of the bottom, races with new grease then fit the rollers or balls. The grease holds the balls in place while you start to reassemble the bearing. If you’re replacing loose balls use the same number that came out. If you’re replacing balls in a clip, with loose balls, put in as many as will fit - in-line, along the wear-line of the race - then remove one so those that remain have room to roll.
Step 7 - Put The Forks In
Put the threaded steerer tube back into the headtube, take care not to disturb the balls - or roller clip - stuck in the grease. If the race had a rubber seal put it back in the right place. Strap the fork to the downtube.
Step 8 - Grease The Top
If you turned the bike over spin it back to the right way up. Grease one side of the top race and fit the balls or rollers.
Step 9 - Reassemble
Fit any rubber seal and reassemble the top race, any washers and screw down the lock nut finger tight. Put the handlebar stem back in the threaded steerer tube and lock roughly in place.
Step 10 - Lock
Remove the strap, fit the front wheel and reconnect the front brake. Put the bike on the floor to make final adjustments to the bike headset before locking it.
Step 11 -
Check the position of the handlebars and lock in place.
#BikeRepair #HowTo #BicycleMaintenance - Jak na to + styl
This is the best example that I have seen on removing and reinstalling the front fork assembly. Absolutely on point. Great video - you are a great bike mechanic. Exactly what I needed to see.
finally a normal bike, not a super sophisticated bike like in other videos. Thank you.
The other videos on this issue and type of bike do not show how to do it comprehensively enough this one is perfect
Hey mate. Ozzy bike laymen here. This video saved me a lot of trouble and a bill i didn't need. More than that the clarity with which you explain and detail bike maintenance has made me appreciate bikes even more(and i was already a big fan). Subscribed. And thank you.
Great, that's nice to hear!
This is a great channel!
@5:34 the moment when he thought about using his teeth for a second and realized it wouldn't quite make the final cut...
Very nice video thanks! What if the I think it's called cone mounted on the fork at the very bottom, what if that's pitted, then how do you replace that? Is that somehow pressed on or does it slide off? I only commute by bike so is there a trick of the trade to quick look to see if the cone or race is pitted or not top and bottom... probably wishful thinking and requires one to take it apart, look, reassemble it, go to the bike shop for parts, then return home to repair, right?
excellently presented
Fine tutorial - thank you. In your experience, do the top washers serve any functional purpose? Have you seen bikes without them?
Did the transporter just teach me how to service a headset?!
Zen and the Art of Bicycle Maintenance
Sir what was the number of hand tool?
Thank you so much, my friend, optimal tube, my name jairo
Hello, when you dismantled this steering gear, on 2.03 minute you take out a black flat ring, being over off the ball-bearings. And on the 7.28 minute you did not put back this ring, why?
Because he's an idiot.
Naise
Sir what is the size of the loose ball bearing ?
I dont know! I don't thing there's a standard size, you're best taking them to a shop for a matching replacement.
You can measure the size of the existing ball bearings for replacement with "Park Tool SBC-1 Bicycle Spoke, Bearing, and Cotter Gauge" 10 dollars on Amazon. It's very cool / simple...it has holes of different sizes into which you pass the ball bearing.
Whats the grease
Not exactly sure which one we used, but any bearing grease will do. If in doubt, just ask your bike shop for some bicycle grease.
Steel balls size ? Please reply! 🙂
You can measure the size of the existing ball bearings for replacement with "Park Tool SBC-1 Bicycle Spoke, Bearing, and Cotter Gauge" 10 dollars on Amazon. It's very cool / simple...it has holes of different sizes into which you pass the ball bearing.
He's not putting back the rubber seal, and the bearing at the end of the video is different from the start
is it okay not to put a rubber seal?
yes but it will be more prone to needing service because water will go in easier
Sometimes the, especially on older headsets, seals are not part of the construction. They usually function okay.
@@MadeGoodFilms i have bought tange vantage headset brand new but it had terrible seal all grease flows out and it's already ruined, bad design.
What is the maximum wear (movement)in the steering bearings that should be allowed before changing them?
Old cycle handle service in hindi speake
9
at 4:38 you take one of balls from bottom bearing , why
Please have another listen from 3:38 - it allows the balls space to roll.
Informative, but by God does it drag on - do we have to see nearly every ball bearing going in individually? Or exactly how long it takes the leather strap to be done up? (top-tip: a velcro strap would be quicker!) You could've edited this down by 2-3 minutes if you'd cut out all the unnecessary faff.