Binding NSF brake, however the caliper is ok ? EP3 Type R 05
Discussion
Long story but last year the nsf was binding
Replaced caliper, hose, discs and pads and it was still the same, the piston would not return. After a bit of digging we replaced the abs pump and it fixed the job
Fast forward to last week, same symptoms again binding nsf and piston not returning
Surly it cant be another abs pump ? Is there a common issue with this happening on the NSF wheel ?
Discuss
Thanks
Replaced caliper, hose, discs and pads and it was still the same, the piston would not return. After a bit of digging we replaced the abs pump and it fixed the job
Fast forward to last week, same symptoms again binding nsf and piston not returning
Surly it cant be another abs pump ? Is there a common issue with this happening on the NSF wheel ?
Discuss
Thanks
A years worth of crud, road debris, heat cycling and a salty winter could be enough to bind up the piston. Could be if the dust shield wasn't fitted correctly it could have water ingress too.
I'd run the piston in and out a few times with the pedal and a G clamp to free it up again, smear of copper grease and see how it goes. Honda calipers are notorious for this, I have a FN2 and an S2000 and both have jammed up multiple times on multiple calipers.
I'd run the piston in and out a few times with the pedal and a G clamp to free it up again, smear of copper grease and see how it goes. Honda calipers are notorious for this, I have a FN2 and an S2000 and both have jammed up multiple times on multiple calipers.
Came across something like this on a Scooby. Eventually turned out to be a design thing. In the Scooby there was a valve in the brake line between the ABS and the caliper. As the car cornered, the brake would be applied on the inside of the corner. It was this valve that was failing.
Not saying it is the case with yours, but might be worth having a look.
Not saying it is the case with yours, but might be worth having a look.
You might have a sticking piston - there only needs to be a bit of s
t to cause this to happen. Pump the iston out (but not so it falls out!) until clean metal is clearly showing. Clean it very well with brake cleaner, then using some silicone spray and incredibly fine wet and dry paper (emery paper) give the piston a good polish. Give it a good wipe, then lightly smear some red rubber grease or silicone around the piston; use only red rubber grease, or silicone grease as these are not petroleum based and wont swell the rubber dust and fluid seals. (useing copper grease, lithium grease etc will likely cause an issue with the seals). use an appropriate tool (G-clamp or a specialised winding tool) to get the piston back in, wip off any excess red rubber / silicone grease. Reassemble the pads and pins etc, using red rubber grease / silicone grease where there is any metal/rubber contact, and antiseize (copper) grease where there is metal/metal contact.
This might help. If not, you might have to rebuild the caliper with fresh seals.
t to cause this to happen. Pump the iston out (but not so it falls out!) until clean metal is clearly showing. Clean it very well with brake cleaner, then using some silicone spray and incredibly fine wet and dry paper (emery paper) give the piston a good polish. Give it a good wipe, then lightly smear some red rubber grease or silicone around the piston; use only red rubber grease, or silicone grease as these are not petroleum based and wont swell the rubber dust and fluid seals. (useing copper grease, lithium grease etc will likely cause an issue with the seals). use an appropriate tool (G-clamp or a specialised winding tool) to get the piston back in, wip off any excess red rubber / silicone grease. Reassemble the pads and pins etc, using red rubber grease / silicone grease where there is any metal/rubber contact, and antiseize (copper) grease where there is metal/metal contact. This might help. If not, you might have to rebuild the caliper with fresh seals.
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