Seatpost Cam Action Clamp; Brakes - Diamondback Bicycle Owner's Manual

(2) Put the chain on to the smallest sprocket. Then, insert the wheel into the frame dropouts
and pull it completely in to the dropouts. The axle nut washers should be on the outside,
between the frame and the axle nut.
(3) Using the correct size wrench, tighten the axle nuts enough so that the wheel stays in
place; then use a wrench on each nut simultaneously to tighten the nuts to 240 - 300
inch pounds.
(4) Push the rear derailleur back into position.
(5) If you disengage the brake quick-release mechanism in 3.g. (1) above, re-engage it to
restore correct brake pad-to-rim clearance.
(6) Spin the wheel to make sure that it is centered in the frame and clears the brake pads;
then squeeze the brake lever and make sure that the brakes are operating correctly.
B. seatpost Cam Action Clamp
Some bikes are equipped with a cam action seat post binder. The seatpost cam action binder
works exactly like the traditional wheel cam action fastener (Section 4.A.2) While a cam action
binder looks like a long bolt with a lever on one end and a nut on the other, the binder uses an
over-center cam action to firmly clamp the seat post (see figs. 8a & 8b).
wArnInG: r
you to lose control and fall
1. a
sk your dealer to help you make sure you know how to correctly clamp your seat post
2. u
nderstand and apply the correct technIque for clampIng your seat post
3. B
efore you rIde the BIke
adjusting the seatpost Cam action mechanism
The action of the cam squeezes the seat collar around the seat post to hold the seat post securely
in place. The amount of clamping force is controlled by the tension adjusting nut. Turning the
tension adjusting nut clockwise while keeping the cam lever from rotating increases clamping
force; turning it counterclockwise while keeping the cam lever from rotating reduces clamping
force. Less than half a turn of the tension adjusting nut can make the difference between safe
and unsafe clamping force.
wArnInG: t
wIth one hand and turnIng the lever lIke a wIng nut wIth the other hand untIl everythIng Is as tIght as you
can get It wIll not clamp the seatpost safely
wArnInG: I
f you can fully close the cam lever wIthout wrappIng your fIngers around the seat post or a
frame tuBe for leverage
. o
Is InsuffIcIent
C. Brakes
There are three general types of bicycle brakes: rim brakes, which operate by squeezing the
wheel rim between two brake pads; disc brakes, which operate by squeezing a hub-mounted
disc between two brake pads; and internal hub brakes. All three can be operated by way of
a handlebar mounted lever. On some models of bicycle, the internal hub brake is operated by
pedaling backwards. This is called a Coaster Brake and is described in Appendix C.
22
IdIng wIth an Improperly tIghtened seat post can allow the saddle to turn or move and cause
. t
herefore
,
fIrst check that the seatpost Is securely clamped
he full force of the cam actIon Is needed to clamp the seatpost securely
,
and the lever does not leave a clear ImprInt In the palm of your hand
;
pen the lever turn the tensIon adjustIng nut clockwIse a quarter turn
:
.
.
.
.
. h
oldIng the nut
,
the tensIon
;
then try agaIn
.