If you haven’t had your bike tuned up by your local
bike shop in a while, now would be a good time.
Installing the EMtnD will place extra stress on your
bike so it’s important that it be in top condition.
Step 1: Find a way to secure your bike while
working. (photo 1)
Trikes can simply be rested on all three wheels.
Placing the trike on large table top can make it eas-
ier to work on.
Note that the following two steps would take any
competent bike shop about 5 minutes to do. If you
would rather not hassle with them, take your bike
to your local bike shop and have them remove the
crankset and bottom bracket. Then start at step 4.
Step 2: Remove crankset.
Remove the crank set including the left arm.
Leave chain hanging from front derailleur.
The tools involved will differ between crank
models and brands.
The cranks are held in place by bolts, sometimes
concealed under caps. Remove using a socket or
hex wrench.
Once the bolts are out, use your crank
puller tool to pull the cranks off of the bottom
bracket axle (photo 2).
Step 3: Remove bottom bracket.
The EMtnD is designed to work with frames
that take standard 1.37” x 24tpi, 68mm wide
bottom brackets.
If yours is not, you will need
to find a compatible wide bottom bracket to use
with the EMtnD. The supplied one uses a 127mm
square taper axle. There is quite a bit of adjustabil-
ity built into the EMtnD, so a similar one should
work fine.
There are different bottom bracket tools, so you
will need to use the one appropriate for your bike.
Photo 3 shows the tool used for Shimano cartridge
bottom bracket nuts such as the one supplied with
the EMtnD.
Note that the
right
nut is left-hand threaded, i. e. it
tightens by turning left and loosens by turning to
the right (clockwise). The
left
nut uses standard
right hand threads (loosens counterclockwise).
Remove the left nut first. The cartridge will come out along with the right nut.
(1) Bike on Work Table
(2) Removing Crank with Crank Puller
(3) Remove Bottom Bracket
