Ultra motor A2B Hybrid Manuale di Servizio Scaricare il pdf (Pagina 33)

5-5

CHAIN and CRANKSET

Installation

1. Fit the chainring onto the spokes (spider)

so the chainring mounting holes align with

the holes on the spokes.

2. Position the chainring so the cutout with

the tab (B, Figure 14) aligns with the crank

arm.

3. Apply oil to the threads of the chainring

bolts.

4. Fit a nut (C, Figure 14) into the inboard

side of the chainring, and turn in a chainring

bolt (B, Figure 9). Repeat until all bolts are

turned in.

5. Evenly tighten the chainring bolts in a

crisscross pattern. Torque each bolt to the

specification in Table 5.

Chainring Wobble Check

When installing a new right crank arm or

reinstalling a right crank arm with a new

chainring, the crank arm must be installed

in the position that produces the least

amount of chainring wobble. Perform the

following to determine that position.

1. Place a reference mark in one corner of

the end of right spindle.

2. Rotate the spindle so this reference mark

sits at 12 o’clock.

3. Fit the right crank arm onto the spindle

so the arm points to 6 o’clock.

4. Strike the arm with a plastic mallet so the

arm is securely seated on the spindle.

5. Rest a hand against the frame down

tube. Lightly touch the inside of the

chainring with the end of a forefinger

(Figure 15).

Installation

When installing both crank arms, install

the right crank arm first, and then install the

left crank arm so it is oriented 180 degrees

from the right arm.

1. When installing a new right crank arm or

a new chainring, check chainring wobble

as described in this chapter.

2. Use acetone or alcohol to clean the

flats of the spindle.

3A. When reinstalling an old crank arm,

align the indexing marks (Figure 10) made

during removal. Tap the crank arm onto

the spindle with a plastic mallet.

3B. If installing a new right crank arm and/

or new chainring, perform the following:

a. Rotate the spindle so the reference

mark from the chainring wobble test is at

the position that produced the least

amount of wobble.

b. Fit the chainring into the chain.

c. Rotate the derailleur forward, and seat

the crank arm onto the spindle so the arm

sits at 6 o’clock.

d. Tap the crank arm with a plastic mal-

let.

4. Apply grease to the crank arm bolt. Turn

in the bolt, and torque crank arm bolt (A,

Figure 9) to the specification in Table 5.

5. Repeat for the left crank arm if neces-

sary. Make sure the left crank arm is 180

degrees opposite the right crank arm.

CHAINRING

Removal

1. Remove the right crank arm as described

in this chapter.

2. Inspect the inboard side of the crank-

arm/chainring. Note that the chainring is

mounted so the cutout with the tab aligns

with the crank arm (B, Figure 14). The

chainring must be mounted in this position

during installation.

3. Use a screwdriver to hold the chainring

nuts (C, Figure 14), remove the chainring

bolts (B, Figure 9), and remove the chainring

from the crank arm.

FIG. 14

A

B

C

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 47 48

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