ACCELERATOR AND BRAKE GREASING, ADJUSTMENT, AND REPLACEMENT
If the Gas Pedal and Brake Pedal values cannot be set within
the appropriate ranges in the Input Test menu, an adjustment of
the accelerator or brake potentiometer is needed. If the accelerator
or brake cannot be adjusted appropriately, the accelerator or
brake potentiometers need to be replaced. The gears and shafts
should be greased every three months.
ADJUSTING
- The Indy 500 Twin game must be left plugged in and turned
on. Exercise caution in using tools around the plugged-in game.
- Open the lower rear service panel on the affected side. From
the rear, the Brake is on the right, and the accelerator is on
the left (see Figure 58).
- Loosen the two screws that secure the potentiometer (V.R.)
bracket, and move the bracket to disengage the gears.
- With the Input Test menu on-screen, make adjustments by releasing
the accelerator or brake pedal so that the variable value is
below 30H.
- Mesh the gears to secure the bracket. Be sure that the gear
is fully engaged and tighten the bracket screws.
- Loosen the two screws which secure the adjust gear.
- With the Input Test menu on-screen, make adjustments by stepping
on the accelerator or brake pedal so that the variable value
is above COH.
- When the desired value has been obtained, retighten the two
adjust screws.
- Close the rear access panel.
- Set the Gas and Brake Pedal variable values in the Control
Range ("Volume") menu.
FIGURE 58: ACCELERATOR AND BRAKE ASSEMBLY ACCESS
POTENTIOMETER REPLACEMENT
- Turn off and unplug the Indy 500 Twin game.
- Open the lower rear service panel on the affected side. From
the rear, the Brake is on the right, the Accelerator is on the
left (see Figure 58).
- Loosen the two screws which secure the potentiometer (V.R.)
bracket (see Figure 59).
- Remove and replace the potentiometer, bracket and gear.
- Replace the bracket screws.
- Close the rear access panel.
- Turn on the Indy 500 Twin game.
- In the Input Test menu verify the potentiometer values by
stepping on the accelerator or brake pedal and verifying that
the variable value is above COH, and releasing the accelerator
or brake pedal and verifying that the variable value is below
30H.
- Set the Gas and Brake Pedal variable values in the Control
Range ("Volume") menu.