Detailed Maintenance Procedures
Follow these step-by-step procedures for key maintenance tasks on your dump truck to ensure proper service and maximum component life.
Hydraulic System Service
- Park truck on level ground with dump body lowered
- Ensure hydraulic oil is at operating temperature
- Shut off engine and relieve hydraulic pressure
- Clean area around fill cap and filter before removal
- Drain hydraulic oil into appropriate container
- Replace hydraulic filters as specified
- Refill with proper hydraulic fluid to correct level
- Start engine and cycle hydraulic system slowly
- Check for leaks at all connections
- Recheck fluid level and adjust if necessary
Brake System Adjustment
- Park on level surface, chock wheels, release brakes
- Verify air system at full pressure (120+ psi)
- Measure free play at chamber pushrod (should be 3/8"-1/2")
- Adjust slack adjusters if free play exceeds specifications
- Turn adjuster until resistance is felt, then back off
- Verify proper adjustment with measurement
- Check brake shoe to drum clearance (should be minimal)
- Perform brake timing test on all axles
- Verify brake balance by testing on safe surface
- Document all adjustments in maintenance log
Dump Body Inspection
- Clean dump body thoroughly to reveal potential issues
- Raise body fully and secure with safety props
- Inspect body for cracks, especially at stress points
- Check hinge points for wear, lubrication, integrity
- Examine hydraulic cylinder mounts for cracks
- Inspect cylinder rods for damage and scoring
- Check tailgate hinges, pins, latches for wear
- Verify tailgate seal condition and effectiveness
- Inspect body to frame mounting points
- Test body operation through complete cycle
Cooling System Service
- Ensure engine is cold before beginning
- Relieve cooling system pressure carefully
- Drain coolant into appropriate container
- Flush system with clean water until clear
- Inspect all hoses for cracks, soft spots, leaks
- Check radiator fins for damage and clean as needed
- Replace thermostat if required by service schedule
- Fill system with proper coolant/water mixture
- Bleed air from system at high points
- Pressure test system for leaks before operation