OM3054 03/13 Operating Instructions - Section 30 Page 30-9 Brake Lock 6. Check the operation of the brake lock: a. Depress brake lock switch (6, Figure 30-3). Verify the brake lock indicator lamp illumi- nates. b. With the F1 start switch OFF, move the transmission shift lever to D to enable the transmission to start in second gear. Gradu- ally increase engine speed to 1410 rpm. The truck must remain stationary. If the truck moves, notify maintenance personnel to immediately repair the rear brakes. DO NOT operate the truck until the brake lock is fully operational. c. Reduce engine speed to low idle. Place the shift lever in NEUTRAL. Switch the brake lock to OFF.
Verify the brake lock indicator lamp is off. 7. Check the gauges, warning lights and instru- ments before truck use to ensure proper system operation. If any warning lights are illuminated, shut off the engine immediately and determine the cause. FIGURE 30-3. BRAKE SYSTEM CONTROLS 1. Center Dash Panel 2. Retarder Lever 3. ARSC Lever 4. Auxiliary Brake Switch 5. Brake Pedal 6. Brake Lock Switch 8. Ensure headlights, work lights and taillights are working properly. Good visibility may prevent an accident. Check the operation of the windshield wiper and washer.