The crank on my bike is bent so im trying to get the pedals off of my schwinn z force bmx bike but i dont know how. was wondering if you could help?
Hi, As your BMX has 3 piece cranks. Here is how to go about it:
1. Unscrew the plastic cap on the side of the crank - driveside.
2. Take your 14 mm socket and ratchet, unscrew
the bolt that holds the crank to the axle. Remove the bolt of both
cranks(Left and Right). You can squeeze the handle of the ratchet and
the crank together like pliers to give you more leverage.
Take the puller and screw it's socket inside the threaded hole of the
crank. Hold the crank and turn the puller handle clockwise until the
crank arm falls off from the axle by itself. Remove both crank arms.
Go to the left side and with the pliers firmly held with both of your
hands(This is where the pictures differ, I'm taking a picture at the
same time.), unscrew the lockring from the bearing cup.
again firmly with both hands, grab the bearing cup with the pliers and
slowly test the resistance. You do not want to slip here since this
will definitely strip the thread on that cup. Hold those pliers hard
and go slowly, it should get it going within a quarter turn and then
you should be able to unscrew it with your fingers. If not, keep on
going and be careful. Remove the cup.
6. Remove the axle and bearing crowns from both sides.
Remove the right side bearing cup by unscrewing it in a clockwise
fashion. The notch are not very wide, so might have to hold the pliers
on the cup with one hand and the handles with the other. Be aware that
this cup is often very hard to remove. Again, you can always purchase a
specialised wrench just for that purpose.
Clean and inspect everything. What you are looking for is a clean and
even line on the axle and inside the bearing cups. Any pits in that
line will damage the bearings and they will eventually self destruct.
Replace any parts that need replacing.
9. Regrease everything,
the axle, the cups and the bearings. I use regular green axle grease
with a touch of white teflon grease. Make sure that everything you've
pulled out of that frame is extra clean, including the hole in the
frame where it came from. The most minute piece of dirt can ruin your
10. Start by installing the right side bearing cup.
Screw it in counterclockwise real tight. Insert the bearings and the
axle. Insert the bearings in the left bearing cup and screw on the
frame. Screw it until you feel resistance. Test to see if the axle
turns freely and tug it up and down to see if there is any play. No
play? Turns freely? If the answer is yes to both questions, install the
lockring on the left bearing cup.
11. Reinstall the crank arms
tightly. I would check them again in a few weeks to be sure. When you
think it's tight enough, tighten some more. That's it, you're done.
Hope this helps and please vote if so :)
Aug 05, 2010 |
Schwinn S2010WMB Z Force 20" Boy's BMX...