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| Illustration 1 | g00103058 |
(1) Parking brake control knob. | |
When the parking brake control knob is pushed in, the parking brake is disengaged. The gear selection is not affected when the parking brake control knob is in the disengaged position.
When the parking brake control knob is pulled out, the parking brake is engaged. The transmission will not shift out of neutral into first speed forward or into first speed reverse when the parking brake control knob is in the engaged position.
The transmission can be engaged if the transmission is in second speed forward, in third speed forward, in second speed reverse or in third speed reverse. However, a Warning Category 3 will occur.
When the transmission is in first speed forward or in first speed reverse and the parking brake is engaged, the transmission automatically shifts into neutral. In this situation, a Warning Category 1 occurs.
After the electronic control module (ECM) has shifted the transmission into neutral, the parking brake must first be disengaged. The direction switch on the STIC steering control lever must then be shifted to NEUTRAL before the ECM will shift the transmission into a forward speed or into a reverse speed.
If the parking brake engages and the transmission is in first speed forward or in first speed reverse, the ECM shifts the transmission into neutral. Before the ECM will allow the transmission to shift into a forward speed or into a reverse speed, push in on the parking brake control knob in order to disengage the parking brake. Next, shift the direction switch on the STIC steering control lever to NEUTRAL. Then shift the direction switch on the STIC steering control lever to first speed forward or to first speed reverse.
To shift the transmission to second speed forward, to third speed forward, to second speed reverse or to third speed reverse, you must first shift the transmission to neutral. Next, shift the transmission to the desired gear.
Approximately 15845 kPa (2300 psi) of oil pressure is supplied to the parking brake during normal operation. This prevents the springs inside the parking brake from engaging the parking brake.
Note: The following information is provided in case of a malfunction of the parking brake interlock.
The parking brake control valve expels pressure during a malfunction in the hydraulic system. One type of malfunction in the hydraulic system is a loss of system pressure. The parking brake control valve then allows the internal springs to engage the parking brake.
If there is a hydraulic failure and pressure oil is not available to release the parking brake, a drive-through mode is available. The drive-through mode functions when the operator pushes in the parking brake control knob.
Before the ECM will allow the transmission to shift into a forward speed or into a reverse speed, push in on the parking brake control knob in order to actuate the parking brake switch. Next, shift the direction switch on the STIC steering control lever to the NEUTRAL position. Then shift the direction switch on the STIC steering control lever to first speed forward or to first speed reverse.
Note: First speed forward or first speed reverse must be used in order to drive through a parking brake that functions correctly.