Hope Tech M4 Brake - Manual (Page 8)

8
3. Service
3.1. Regular maintenance
Cleaning your brake
The braking performance will be severely reduced if the disc rotor and pads become contaminated
with oil, brake fluid or after-market degreasing and cleaning agents. Clean your brake with water.
If the disc rotor becomes contaminated it can be cleaned by wiping with a rag with isopropyl
alcohol or disc brake cleaning products designed specifically for bicycle disc brakes. Heavily
contaminated brake pads will need replacing.
Checking for system leaks
Check the hose for any damage such as chaffing against the bike, or whenever the bike has been
rough handled or dropped. A split hose (however tiny) will cause a system leak which will severely
impair braking performance. A damaged hose will need replacing.
Check the caliper and lever assemblies for any signs of fluid loss. See the Troubleshooting section
for fixing any problems.
Checking the brake pads
The brake pads will need replacing when the friction material is worn down to 0.5mm. Do not wait
until the friction material has worn through to the backing plate because the brake will not function
and you will damage the disc rotor.
3.2. Changing the brake pads
Closed 2
1. Remove the wheel.
2. Remove the split pins using pliers and slide out the old pads from the caliper.
3. Retract the pistons turning the brake lever master cylinder screw adjuster anti clockwise.
4. Clean the inside of the caliper with a clean rag and insert the new brake pads, and new split
pins. The new pads must be genuine Hope compatible pads for the appropriate caliper.
5. Refit the wheel and adjust the pad position, (see section 2.5).
6. Bed in the new pads (see section 2.6).
Mini and M4
1. Remove the wheel.
2. Remove the ‘R’ clips using pliers, unscrew the retaining pins and slide out the old pads from the
caliper.
7. Gently prise the pistons back into the caliper using a plastic tire lever (or similar).
8. Clean the inside of the caliper with a clean rag and insert the new brake pads, and new springs.
The new pads must be genuine Hope compatible pads for the appropriate caliper.
9. Refit the wheel and adjust the pad position, (see section 2.5).
10.Bed in the new pads (see section 2.6).