Triumph Trident T160 - F12 REAR BRAKE CYLINDER; F13 STRIPPING AND REASSEMBLING BRAKE CALIPER

F
BRAKES, WHEELS AND TIRES
(d) Place one finger over the main feed port (marked
'A' In Fig. F6), and by blowing through the
outlet end of the cylinder, it will be observed
that no air will escape from the breather port
(,B' Fig. F6).
(e)
Now unscrew the cylinder barrel until air is
heard·
to escape from the breather port. At this
point the port will have just become uncovered.
(f) Unscrew the barrel one complete turn, and set
the angie to 10'. The milled flat on the threaded
end of the barrel mUst be located when the
grub !'crew (Fig. F6) is being retightened,
and will set the angie automatically.
Re-assemble the master cylinder to the handlebar,
replenish the reservoir with fluid, and 'bleed' the
system as described in Section F7.
SECTION FI2
REAR BRAKE CYLINDER
In general principle the procedure to be
adopted with the rear brake cylinder will be
Identical to that used for the front brake. In the
case of the rear assembly however, the reservoir Is
located under the dual seat being held in place by a
bolt to the rear. of a bracket forming part of the
battery carrier.
SECTION FI3
STRIPPING AND REASEMBLING BRAKE CALIPER
Detach the protection cover from the caliper by
removing the two cross head screws. Drain the
system of fluid (See Section F6). Detach the feed
pipe
from the caliper, remove the tWO securing
nuts at the forkleg, and withdraw the caliper from
its mounting studs. Remove the two split pins that
retain the brake pads, and pull them out.
No attempt should be made to remove the bridge
bolts joining the two halves of the caliper. There is
no
necessity to do so, as all the servicing can be
carried out without splitting the halves. In addition,
the bolts are tightened to a critical torque loading.
If, possibly as the result of an emergency, It becomes
necessary to split the brake caliper, check that
the fluid channel seal Is undamaged, before reassem-
bling. The caliper and bridge bolts should be
thoroughly clean, and dried, prior to reassembly,
and naturally, the caliper Itself must be spotlessly
clean. The bridge bolts should be tightened to a
torque loading of 35/40 foot pounds (4.8-5.5 kg.m).
After reassembling, the brake caliper should be
checked for fluid tightness under maximum brake
lever pressure.
The forgoing procedure should be looked upon as a
temporary expedient, and the caliper should then
be returned to the manufacturers for overhaul, at
the earliest opportunity.
Fi0
Service the rubber seals as follows, referring to the
exploded view In Fig. Fl. A rubber sealing ring
(1) Is fitted In a grove machined in each piston bore,
to seal off the hydraulic fluid. A "U" shaped rubber
dust seal (2) having two wiping edges, and housed
In a metal container (3), Is pressed Into the open
end of the piston bore, to prevent the Ingress of
dust from the brake pads.
The dust seal (2), together with its retainer (3), must
be renewed each time they are removed from the
piston ·bore. When the rubber seal (1) is Worn or
damaged It mUst be renewed. Before installation,
the seals should be lubricated with Lockheed disc
brake lubricant. The movement of the pistons (4
and 5), within their respective bore, extrude the
rectangular rubber seal (1) from Its groove. On
releasing the brake lever, the hydraulic pressure
collapses, and the rubber seal (1) retracts the pistons
(4 and 5) a pre-determined amount, thus maintaining
a constant clearance between the brake pads and the
brake disc, when the brakes are not in Use.
To remove the rubber seals, prise out and discard
the dust seal (2 and 3) from the open end of each
piston bore, by Inserting the blade of a blunt screw-
prlver between the seal and retainer. Eject each
piston from their bores by applying compressed air
to the fluid Inlet. Lift oUt and discard the sealing
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