Forum menu
What with all the cold weather and salt on the road, my hope mini's piston has seized. How easy are they to replace? Rather hastily i have just ordered some new pistons from crc expecting the job to be striaght-forward! is it?
Sticking pistons on Mono Minis is a common problem that can be sorted with Silicone grease, available of ebay from divers shops
Seal kit would have been better option.
Simple - is it mono minis? You really need the bore cap tool to replace seals and / or pistons
However there is a good chance that you don't even need to strip the caliper. Caliper off bike, pads out,hold in the moving piston and pump brake until stuck one starts to move - I find a cone spnner in the slot in the caliper works well to hold the piston. Clean around the piston once p[art way out, Brake fluid or rubber grease over the piston , work it in and out a few times.
[url= http://steveukmtb.wordpress.com/hope-caliper-overhaul-minitrialsm4v2m6/ ]How to here[/url]
I have just sent mine back to Hope for servicing. £40 which includes new pads.
I'd second Leku. Unless you like faff send them back to Hope and they'll come back like new. Usually a super quick turnaround too.
Same as tandemjeremy. I gently clamped the moving piston, then pumped the seized one out. Greased, then pushed back in. it took about 10 mins.
ive got to do this on my avids this week after advice on this forum last week. I wish I had the option of sending them back to hope!
Yeah its not a hard job, just a bit of a faff. Just follow TJ advice and clean the stuck piston
I've got to do the exact same with one of my M4 Calipers
I know it sounds kind of obvious, but don't just clean/lube the piston that is/was sticking. Putting something in the rotor slot, like a washer as shown in my overhaul guide that Leku linked, will allow you to fully extend both pistons.