HOPE Tech 3 E4 - Tips, Tricks For Setup. Bleeding & Alignment - Part 1 - General Problems Diagnoses

Hope tech 3 tips and tricks for solving some issues regarding this popular hydraulic brake. We have what seems to be a caliper piston issue and wanted to run though some diagnoses.
This was meant to be a quick video but ended up at 1 hour 20 minutes so splitting it up.
Added these tech 3 e4 to a project and had a few issues, not just the brakes but the frame so wanted to document it, might be useful.
0:00 Brief description of the problem
01:40 If your piston does pop out
03:03 Caliper seems fine, so must be either hose or lever?
03:56 Removing DOT fluid from the system
04:55 Removing hose from lever
07:47 Testing hose for blockage
08:06 Testing the lever for blockage
09:36 Hope deflector plate
12:05 Deflector plate part number
12:40 Looking inside the reservoir area
14:11 Tool to unblock the tiny hole
14:53 Using wire to unblock hole in lever
17:00 Lever is unblocked
17:30 Some close up footage of the lever
18:12 Deflector plate not going back in my lever (Up to you)
18:47 Removing the "Straight Connector" and re-fitting it
19:56 Attaching hose to lever
23:26 Lever clamp
24:10 Better to bolt hose to lever first (twisted hoses)
24:55 Banjo bolt installation (REMEMBER TO TIGHTEN THE BOLT)
26:25 Different mounts and possible issues with them
29:08 Caliper fixing bolts (Needs to have locktite on them)
29:48 CPS washers
31:20 Get the right size bolts
32:05 CPS close up
32:33 Bleed block
33:21 Sometimes you need to change caliper orientation for trapped air bubbles to release

[@clarkie005]

Fantastic video. Covered everything! Always wondered what that deflector plates purpose was!

[@Chambers36TheEnter]

Thanks for your message.

[@twistedneck]

You should bleed the calipers off the bike (preferably before you mount them) that way you can easily get the bubble out that wants to go up the back of the caliper when it’s mounted.

[@Chambers36TheEnter]

I always do that for my own bikes, does save a lot of hassle in the long run.

[@MrTrekvrx]

The deflector plate you removed is not there just for bleeding it serves another purpose. It's there for when you are running down a really bumpy track to stop air getting into the brake if you are on and off them, the same as how a baffle in a car sump works to prevent oil starvation.

[@Chambers36TheEnter]

I see, baffled sump. Thanks.

[@hansonwang2121]

What is the deflector plate normally used for? why don’t you need it with a bleed kit? Do you need it if you bleed your brakes by opening the top cap?

[@Chambers36TheEnter]

The hope bleed kit has a special top cap that allows you to use a funnel, so all the fluid is contained within the lever and cannot escape, so the deflector plate then it's not essential.
It's not essential to have the deflector plate but just be aware that without the deflector plate in place the DOT fluid is free to squirt up and out of the reservoir. It can travel quickly and probably squirt up to 20cm high. So the plate is there I believe to make bleeding a lot easier and less messy.
Without the deflector plate you can just rest the normal top cap on the lever to block any fluid squirting out.

[@danp2509]

where did u get your bleed block from?

[@Chambers36TheEnter]

That's just from ebay, people 3d print them and sell them there.

[@jake30966]

Can you help me with replacing 1 piston on my V4 brake ?

[@Chambers36TheEnter]

If you look up Hope Piston tool you will hopefully find some plastic blocks that people 3d print, they sell them on ebay etc and it allows you to remove one piston from the caliper providing that you have pressure in the system.
That's just me assuming that's the issue.
You can just block the other pistons with some folded paper but it gets difficult that way. If you don't have the caliper connected to a bled system then you can use a air pump/track pump on the bleed nipple to create the pressure needed but you would need to disconnect the hose from the caliper with the air pump method.

[@jake30966]

@@Chambers36TheEnter thanks for getting back to me , there is pressure in the system , would I need to bleed them again after changing the piston ?

[@jca110]

@@jake30966duh