Ultra motor A2B Metro, Service Manual

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5-3
CHAIN and CRANKSET
Installation
1. Route the non-riveted end of the chain
under and around the rear of the derail-
leur tension pulley. Following the derailleur
cage, feed the chain up the front and
over the top of the guide pulley. Once the
chain emerges from the derailleur cage,
route it under and around the smallest cog
(high gear).
2. Route the chain over the upper idler
and around the chainring.
3. Feed one end through the lower chain
idler. Make sure the chain passes over and
engages idler cog.
4. Move the chain so the two free ends
meet in the lower chain run.
5. Slip the non-riveted end of the chain
over the rivet protruding from the other
end of the chain.
6. Install the chain tool onto the chain. Pay
attention to the following:
a. If the tool has two cradles, use the
cradle furthest away from the tool han-
dle.
b. Fully seat the rollers on the tool cradle.
c. Center the drive pin on the rivet.
d. Make sure the side plates are properly
aligned.
7. Turn the tool handle, and drive the rivet
until it is centered within the link. The dis-
tance from the outer side plate to the end
of the rivet should be the same on each
side of the chain (
Figure 7 ).
Lubrication
CAUTION
Use oil designed for bicycles. Automotive
and household oils are unsuitable for the
A2B Metro chain.
FIG. 7
A
A
B
B
FIG. 8
A
FIG. 9
B
1. Oil the contact areas between the inner
and outer side plates on each link (A,
Figure 8 ), and oil the contact areas
between the inner side plates and each
end of the rollers (B,
Figure 8
).
2. If the chain is installed on the A2B Metro,
back pedal for 30 seconds. If the chain is
not installed, wiggle the chain for 30 sec-
onds. This helps the lubricant penetrate
the crevices within the chain.
3. Wipe excess oil from the chain with a
clean, lint-free cloth.
CRANK ARM
Removal
A cotterless crank wrench (Park Tool
CCW-14R) is need when removing the
crank arm.
1. If the pedal requires the service, remove
the pedal from the crank arm.
2. Pull the plug from the crank arm, and
examine the crank arm bolt (A,
Figure 9
).
NOTE
Do not apply excessive amounts of
lubricant to the chain. Excess oil accumu-
lates dirt which accelerates chain wear.