OM3024.1 8/00 Operation - Section 3 Operating Instructions Page 3-9 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 transmission to downshift to the gear range selected. PASSING 1. Do not pass another truck on a hill or blind curve! 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.
Continue this procedure to downshift to the re- quired gear range to maintain engine speed at 2000 – 2100 RPM and brake oil temperature below 248 o F (120 o C). When the proper gear range is attained, continue to use the retarder as needed to maintain a safe, productive speed. 3. Use only the areas designated for passing. If brake oil temperature exceeds 248 o F (120 o C), the Brake Oil Temperature Warning light will turn on. As quickly as safety will permit, bring the truck to a complete stop away from traffic, move transmission range selector to “Neutral”, apply the parking brake, and run engine at high idle.
Continue to run engine at high idle until Brake Oil Temperature Warning light turns off and brake oil temperature cools to below 248 o F (120 o C). If temperature does not return to this range within a few minutes, report the condition immediately to maintenance personnel and wait for further instructions before moving truck. 9. When operating truck in darkness or when visibil- ity is poor, do not move truck unless headlights are on. Do not back truck if back-up horn or lights are inoperative. 10. When backing the truck, give 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. 11.
Do not stop or park on a haul road unless unavoid- able. If you must stop, move truck to a safe place, apply parking brake, shut down engine, block wheels securely and notify maintenance person- nel for assistance. 12. If the warning light for “Low Steering Pressure” illuminates during operation, steer the truck im- mediately to a safe stopping area, away from other traffic, if possible. Refer to item 11 above. 13. Report haul road conditions immediately. Muddy or icy roads, pot holes or other obstructions can present hazards. 14. Cab doors should remain closed at all times while truck is in motion or unattended. 15. Check for flat tires periodically during shift.
If truck has been run on a “flat”, it must not be parked in a building until the tire cools .