Loaders
List Three items that should be periodically checked throughout the day.
Radio and Horn
Back-up Alarms
Lights (brake and back up)
What is the service brake and when should it be used on a haul truck?
-Service brake is a foot operated brake that is designed to slow or stop the truck when 4-wheel braking is needed or when traveling less than 5 miles per hour. It should not be used as a retarder
What are some areas operators have the most impact in the company?
-Safety
-Maintenance costs
-Productivity
-Cycle Times
-Fuel Efficiency
-Tire Wear
List three power train components on a loader.
-Engine
-Torque Converter
-Transmission
-Output Transfer Gear
-Final drive (Front, Rear)
-Drive Shaft (Front, Rear)
-Parking Brake
List three basic principles for building and maintaining roads?
-Long term grades on roads should not exceed 10%
-Short term grades should not exceed 15%
-Roadways should have a 3% crown on level sections(4% crown recommended on ramps and hills)
-Curves should be super elevated as much as 10% where needed
Identify three key points listed for load and carry operations.
- Select the proper gear
-Carry the loaded bucket low
-Travel in reverse when carrying: a load up a steep incline , a large rock or riprap
-Don't overload the bucket
-Use Ride control system(RCS) and torque converter lockup if equipped
On a haul truck, which position should the front brake switch be left?
-In the enabled position(VMC Front Brake Switch labels should be in place on all haul trucks.
What are the 2 largest costs an operator can reduce by operating efficiently?
-Fuel Burn
-Tire wear and life
List the braking systems on a loader.
-Service brakes
-Parking brakes
-Declutch
-Impeller clutch/brake pedal
When maintaining berms what should be followed?
- Berm should be at least mid axle high to the largest equipment traveling in the area
- When pushing material in the pit always push perpendicular to the highwall
List three common causes of loader upsets.
-Raising bucket on a slope or uneven ground
-Tire blows when bucket is raised
-backing or driving through a berm
-Bank caves out from loader
-Driving off elevated road or bank
-Travelling with bucket raised higher than is needed
What must be done if the parking brake or emergency brake is applied while the machine is in motion?
-It must be inspected immediately as it will likely be damaged
What things can affect tire costs? (Name Three)
-Impact Damage
-Moisture
-Improper Inflation
-Operator Technique (Static steering, Oversteer, sharp/fast turns, speeding)
-Road conditions
List three components on a haul truck.
-Engine
-Transmission
-Torque Converter
-Differential
-Final Drive
-Driveline
What are some proper loader techniques when digging material to be loaded onto haul trucks?
-Operator should work the pile face from left to right loading the drivers side
-Loader should stage and load trucks using "V pattern" technique
-Minimize travel distance as much as possible(1 to 1-1/2 wheel rotation in both directions)
-Constant communication with truck operators (Loader operator is Pit leader and should conduct themselves as such)
What does the Brake/Impeller Clutch Pedal do?
- It reduces rim pull down to 20%, then applies the brakes
What is the parking brake on a haul truck designed to do?
-Hold a parked truck in place on the steepest grade it would be operated on while loaded
What is the minimum distance that an operator must stay from 50Kv or less energized power line?
-Never less than 10 feet
(Use a spotter if any area is in question)
What three things could cause a transmission to fail?
-Improper gear selection/shifting
-Overheating
-Fluid Level
What should a loader operators goals be throughout the day?
-Maintain level floor
-Maintain grade on ramp
-Keep travel distances short as possible
-Consistent fast cycle times
-Do not "dog" equipment
-Open Communication
In what situations should a Declutch/Rim Pull pedal never be used?
-When travelling down a grade (could cause engine overspeed)
-When pushing off high wall for a shot
Retarder should not be used for the following:
-Parking Brake
-During Dump Procedure
-When sitting still (Unless following manufactures recommended cool down procedure)
What are some responsibilities of the operator to conduct work safely? (List Three)
-Know the OMM manual
-Proper PPE(No loose clothing, jewelry, ect.)
-Through Pre-shift inspection and reporting defects
-Operating safely and efficiently
-Keeping equipment clean and in good condition
-Workplace inspection and maintenance
-Good communication
-Post shift inspection
Everything in the power train/brakes must be what?
-OEM (Original Equipment Manufacturer)
To achieve max bucket fill the operator should what?
-Not side load bucket
-Dig square/straight into pile
-Raise bucket slightly upon entering pile to reduce digging up floor and establishing traction
-keep back tires on the ground
-Don't "dog" the machine or spin tires
-Keep are clean
-Minimize time in the dig (992 24gph vs 65gph in a dig)