Operator Cab and Controls - Section 32 3/10 OM3216 Page 32-12 UPPER RH SWITCH PANEL Use the brake lock function only while at the shovel or dump. The brake lock is to be used to hold the truck stationary. Do not use this switch to stop the truck. Use of this switch applies the rear brakes at full, unmod- ulated pressure! Do not use the brake lock in place of the parking brake. With the engine off, hydraulic pressure will depressurize, allowing the brakes to release! FIGURE 32-8. UPPER RH SWITCH PANEL 1. Brake Lock 2. F1 Start Switch 3. Hazard Flasher Switch NOTE: If the truck is not equipped with the brake lock option, slot (1) will contain a plug.
F1 Start Switch F1 start switch (2, Figure 32-8) is used to ensure that the transmis- sion starts in F1 when the trans- mission shift lever is in D. When this switch is ON and the transmis- sion shift lever is in the D position, the transmission will shift to F1 to start. When this switch is OFF and the shift lever is in D, the transmission will start in second gear. Refer to Transmission Shift Lever, D - DRIVE. All other for- ward gear ranges (L, F2, F3, F4, F5, F6) start out in F1 regardless of the F1 start switch position. The upper RH switch panel, located to the right of the steering wheel, contains the following:
Brake Lock Switch Moving brake lock switch (1, Figure 32-8) to the ON position, applies the brake lock. When this switch is in the OFF position, the brake lock is released. Depressing the bottom of the switch moves the switch to the ON position. Depressing the top moves the switch to the OFF position. The brake lock can only be used with the engine on. It is used for dumping and load- ing, only. The brake lock switch actuates the hydrau- lic brake system which locks the rear wheel service brakes. Hazard Warning Lights Switch Hazard warning light switch (3, Figure 32-8) causes all turn signal lights to flash, simultaneously.
When approaching a shovel or dump area, select an area with a level surface. When the truck is com- pletely stopped and in loading position, apply the brake lock by moving the rocker switch to ON (up). To release, press the rocker switch to OFF (down). The rocker switch is an ON/OFF type. Depressing the bottom moves the switch to the ON posi- tion. Depressing the top of the switch moves the switch to the OFF position. Use the hazard lights as a warning to alert other truck operators that a problem exists.