| SILVER BULLET & ARROW
PAGE | 12
Slacken the calliper alignment screws
(1)
on the Promax drawing) until the body of the
calliper slides freely (approx. 1/2 turn)
Slacken the fixed anvil setscrew
(4)
by two turns.
Tighten the Adjusting nut
(3)
until the fixed anvil tightens firmly but not tightly
against the disc.
Tighten the calliper alignment screws.
(1)
Slacken the fixed anvil
(3)
by two full turns and inspect. There should be no gap
between the moving pad and the disc. Check with a 0.05mm feeler if in doubt.
Spin the disc to ensure the moving pad is not bearing too heavily on the disc. a slight
rubbing sound or very slight friction is normal providing it is not slowing the disc.
Tighten the fixed anvil with the adjuster nut
(3)
so that the pad is as close as possible
to the disc without slowing the disc. A slight rubbing sound or very slight friction is
normal providing it is not slowing the disc.
Tighten the setscrew
(4)
very lightly to lock the adjuster nut in place.
Check the axle still spins freely
Screw the Cable Adjuster and its locknut
(2)
fully home.
Pull the cable to remove all free movement in the mechanism and clamp it to the arm.
Operate the brake lever and observe any movement that occurs before the arm moves.
If it is excessive, adjust with the adjuster and locknut or re-clamp the wire. Full
braking contact should be achieved before the brake lever reaches the handlebar grip.
Adjust if necessary.
The brake is now ready for use.
Rear Disc Brake
Promax Rear Brake Adjustment (when Fitted).
The Promax Disc brake calliper is of the fixed and moving anvil type. Each supports a
brake pad which is arranged either side of the disc. When the brake wire is pulled by the
brake lever, the moving anvil and thus the pads are forced against the rotating disc
causing the vehicle to slow or stop.
To set up the calliper, it is first necessary to set the moving anvil (and its brake pad) in
close contact with the disc so that the slightest movement causes the pad to press
against the disc. The calliper is then locked in position, the fixed anvil adjusted, and
finally, the brake cable adjusted to suit the calliper setup.
Proceed as follows.
Repeat this process when braking efficiency deteriorates, the pads become worn, or when
the disc visibly buckles when the brake is applied.
When it becomes necessary to replace the pads, follow the Promax instructions below. It
will be necessary to remove the calliper and follow the above procedure during reassembly
and setup. If in doubt, consult a competent cycle technician.
