Konami RACING JAM, Operator'S Manual

Page: 61 / 71

59
Lock nuts
Adjuster bolts
1
Keeping loose the motor bracket
fixing screws and the adjuster bolts,
apply a new timing belt on the
pulley.
2
Make sure the timing belt runs in
mesh with the pulley.
Tighten the adjuster bolts to
achieve the deflection specified in
the figure.
Motor bracket
fixing screws
Timing belt
Lock nuts
Adjuster bolts
Potentiometer
bracket
7-7 Replacing the timing belt and adjusting its tension
How to replace the timing belt
•Before replacing the timing belt and adjusting its tension, be sure to turn
OFF the main power switch and unplug the power cord from the
receptacle.
1
Referring to page 49, separate the
control panel from the main unit.
2
Loosen the four motor bracket lock
screws and the lock nuts first, and
then the two adjuster bolts.
3
Referring to page 50, remove the
potentiometer bracket first and then
undo the timing belt.
7 Maintenance and annex
How to adjust timing belt tension
•If the timing belt has a wrong
deflection, it may break or wear out
much earlier than expected.
MEMO
4
Tighten the motor bracket lock
screws evenly. Finally install the
potentiometer bracket back in
position.
3
Make sure the deflection is as
specified. Tighten up the lock nuts
for the adjuster bolts.
Appropriate timing belt sag
Apply 2.8kg(6.2lb) load
at the center
(0.06in)
Deflection to be
less than 1.5mm
Pulley(at motor side) Pulley
Preferably use a tension gauge available on the market
for easier adjustment. For frequency measurement,set
to 305 Hz.