OM3040 03/13 Operating Instructions - Section 30 Page 30-11 If the operator observes that either the maximum engine speed of 2100 rpm or the brake oil tempera- ture of 120°C (248°F) are about to be exceeded, the operator should immediately move the transmission range selector to the next lower range and use, either the retarder control lever, or the foot-operated brake pedal, to apply more brake pressure until the truck is slowed to a speed which will permit the trans- mission to downshift to the gear range selected. 13. Report adverse haul road conditions, immedi- ately. Muddy or icy roads, pot holes or other obstructions can present hazards. 14.
Cab doors should remain closed at all times while the truck is in motion or unattended. 15. Check for flat tires periodically during the shift. If the truck has been run on a flat tire, it must not be parked in a building until the tire cools. Continue this procedure to downshift to the required gear range to maintain engine speed at 2000 - 2100 rpm and brake oil temperature below 120°C (248°F). When the proper gear range is attained, continue to use the retarder as needed to maintain a safe, pro- ductive speed. PASSING 1. Do not pass another truck on a hill or blind curve! If brake oil temperature exceeds 120°C (248°F), the brake oil temperature warning light will turn on.
As quickly as safety will permit, bring the truck to a com- plete stop away from traffic, move the transmission range selector to NEUTRAL, apply the parking brake, and operate the engine at high idle. 2. Before passing, make sure the road ahead is clear. If a disabled truck is blocking your lane, slow down and pass with extreme caution. 3. Use only the areas designated for passing. Continue to operate the engine at high idle until the brake oil temperature warning light turns off and brake oil temperature cools to below 120°C (248°F).
If the temperature does not return to this range within a few minutes, report the condition immediately to maintenance personnel and wait for further instruc- tions before moving truck. DUMPING 1. Approach the dump area with extreme caution. Ensure the area is clear of personnel and obstructions such as overhead power lines. Obey spotter signals, if present. Avoid unstable areas. Travel at a safe distance from the edge of a dump area. Position the truck on a solid, level surface before dumping. 9. When operating the truck in darkness or when visibility is poor, do not move the truck unless the headlights are on. Do not back up if the back-up horn or lights are inoperative. 10.
When backing the truck, give a back-up signal (three blasts on horn); when starting forward, two blasts on horn. These signals must be given each time the truck is moved forward or backward. As the body raises, the truck center of gravity will move. The truck must be on a level surface to prevent tipping! 11. Do not stop or park on a haul road unless unavoidable. If you must stop, move the truck to a safe place, apply the parking brake, shut down the engine, block the wheels securely and notify maintenance personnel for assistance. 2. Carefully maneuver the truck into dump posi- tion. When backing the truck into dump position, use the foot-operated brake pedal to stop and hold the truck. 3.
When in the dump position, place the transmis- sion shift lever in NEUTRAL, and apply the brake lock switch. 12. If the warning light for low steering pressure illu- minates during operation, steer the truck imme- diately to a safe stopping area away from other traffic, if possible. Refer to item 11 above.