Rearmaster Cylinder; Disassembly; Inspection; Assembly - Triumph DAYTONA 675 Service Manual

Brakes
Rear Master Cylinder
Removal
A
Warning
Before starting work, ensure the motorcycle is stabilised
and adequately supported. This will help prevent it from
falling and causing injury to the operator or damage to
the motorcycle.
1. Remove the rider's seat (see page 16-17).
2. Disconnect the battery, negative (black) lead first.
A
Caution
To prevent paint damage, do not spill brake fluid onto
any area of the bodywork. Spilled brake fluid will
damage paintwork.
3. Drain the fluid from the master cylinder by bleeding
the system at the rear caliper until all fluid has been
expelled.
Remove the clip and washer from the clevis pin at
4.
the lower end of the brake pushrod.
5. Remove the clevis pin.
6. Disconnect from the master cylinder the:
• rear brake hose (noting orientation),
• reservoir hose.
1. Master cylinder fixings
2. Master cylinder
3. Heel guard
7. Remove the screws securing the master cylinder and
heel guard to the frame to release the master
cylinder.
1 4.42
Service Manual - Daytona 675, Street Triple and Street Triple R

Disassembly

1.
Remove the boot from the cylinder and pushrod.
2. Remove the circlip retaining the pushrod to the
cylinder.
Remove the pushrod and piston set from the master
3.
cylinder bore, noting the relative position of the seals
and piston components.

Inspection

1. Visually inspect the master cylinder bore for wear,
scratches or corrosion. Replace as necessary.
2. Check the piston and cylinder bore for damage,
wear or deterioration. Replace as necessary.
3. Always renew the piston and seal set if the cylinder is
dismantled.
4. Examine the pushrod for bends and damage.
Replace as necessary.

Assembly

Warning
Never use mineral based grease (such as lithium or
copper based grease) in any area where contact with the
braking system hydraulic seals and dust seals is possible.
Mineral based grease will damage the hydraulic seals
and dust seals in the calipers and master cylinders.
Damage caused by contact with mineral based grease
may reduce braking efficiency resulting in an accident.
A
Warning
Before installation, all internal brake components should
be cleaned and lubricated with clean new DOT 4 brake
fl uid.
Never use solvents, petrol (gasoline), engine oil, or any
other petroleum distillate on internal brake components
as this will cause deterioration of the hydraulic seals in
the calipers and master cylinders.
A dangerous riding condition leading to loss of
motorcycle control and an accident could result if this
warning is ignored.
Clean the master cylinder bore, piston and seals, with
1.
new brake fluid.
2. Ensure all ports are clear of obstruction.
Il1MP