Detailed Inspection Procedures
Follow these step-by-step procedures for key inspection areas of your concrete mixer truck to ensure thorough evaluation of critical systems.
Air Brake Inspection Procedure
- Start engine and build air pressure to operating range (100-125 psi)
- Turn off engine, release parking brake, and apply foot brake
- Hold foot brake for 1 minute - pressure drop should not exceed 3 psi
- Start engine and rebuild to operating pressure
- Turn off engine and press/release foot brake - observe gauge drop
- Low pressure warning should activate at approximately 60 psi
- Continue pressing brake until parking brake pops out (20-40 psi)
- Start engine and check parking brake by attempting to drive forward
Drum Inspection Method
- Ensure truck is parked on level ground with parking brake set
- Visually inspect exterior for damage, cracks, or concrete buildup
- Rotate drum slowly and listen for unusual sounds
- Check drum drive components for leaks or excessive wear
- Inspect interior fins with flashlight for buildup or damage
- Test drum controls in both directions at varying speeds
- Verify charge hopper is clean and safety grate is intact
- Check all hydraulic connections for leaks or damage
Discharge System Check
- Inspect main chute for cracks, damage, or concrete buildup
- Deploy main chute and check hydraulic operation
- Verify all extension chutes are present and properly secured
- Check extension chute connection points for wear
- Inspect chute rack for security and proper storage
- Test chute wash-out system for proper water flow
- Ensure all chute lock pins are present and functional
- Return chutes to stored position and secure for travel
Water System Validation
- Check water tank level and fill if necessary
- Test water pump operation and pressure
- Inspect all hoses and connections for leaks
- Test all water outlets and valves individually
- Verify spray nozzles are clear and properly directed
- Check water meter for proper operation (if equipped)
- Test slump adjustment system (if equipped)
- Ensure water tank drain valve is closed and not leaking