If your diesel engine fails to start, follow these steps to diagnose the issue:

1. Check the Fuel System
   • Ensure fuel meets ISO/SAE standards (clean, uncontaminated)
   • Verify fuel level and confirm the gauge is working
   • Inspect the tank for debris and make sure the vent is clear
2. Test the Electrical System
   • Check battery voltage (must be at least 12.6V for standard systems or 24V for heavy-duty engines)
3. Inspect Additional Components
   • Examine glow plugs or block heater (if equipped)
   • Look for air intake blockages
   • Check fuel filter condition

For LOVOL engines: Always use genuine replacement parts and refer to your operator’s manual for model-specific requirements.

Common power loss causes and solutions:

1. Fuel Quality Verification
   • Confirm fuel grade matches manufacturer specifications
   • Test for contamination or degraded fuel quality
2. Fuel System Inspection
   Flow Issues:
   • Check for kinked/damaged supply/return lines
   • Verify proper line diameter (avoid undersized tubing)
   • Ensure all connections are airtight
   Contamination:
   • Drain and inspect tank for sediment/water
   • Clean oil pan and replace clogged strainers
   Supply Problems:
   • Test fuel transfer pump output pressure
   • Verify fuel metering unit operation
   • Check for air leaks in delivery system
3. Recommended Maintenance
   • For LOVOL engines: Always use OEM-approved fuel filters
   • Follow prescribed fuel system bleeding procedures

Technical Note: Power loss occurring with black smoke typically indicates different issues than power loss with clean exhaust - consult your service manual for symptom-specific diagnostics.

Key Checks to Reduce Fuel Consumption

1. Fuel System Inspection
   • Leak Detection: Visually inspect all fuel lines, connections, and seals
   • Fuel Quality:
     ✓ Verify correct fuel grade for your engine
     ✓ Test for water contamination or degraded fuel
2. Operational Efficiency
   • Vehicle Resistance:
     ✓ Check for overloaded cargo beyond rated capacity
     ✓ Inspect for improper aerodynamics (e.g., unsecured tarps)
   • Instrument Accuracy:
     ✓ Calibrate odometer if mileage recording is inconsistent
     ✓ Verify fuel gauge readings match actual tank levels
3. Proactive Maintenance
   • For LOVOL Equipment:
     ✓ Use only recommended fuel additives
     ✓ Follow scheduled filter replacement intervals
     ✓ Maintain proper tire pressure to reduce rolling resistance

Key Checks to Reduce Oil Consumption

1. External Leak Inspection
   • Thoroughly examine engine surfaces for oil seepage
   • Tighten all screws, pipe plugs, and connection joints
   • Replace hardened or damaged gaskets/seals
2. Crankcase Ventilation System
   • Check PCV valve operation and hose connections
   • Clean clogged breather filters/passages
   • Verify proper crankcase pressure levels
3. Oil Level Verification
   • Check dipstick on level ground after engine cools
   • Ensure oil level remains between MIN/MAX marks
   • Avoid overfilling above maximum line
4. Maintenance Compliance
   • Follow manufacturer's specified oil change intervals
   • Use only recommended oil viscosity grade
   • Reset oil life monitoring system after changes

For LOVOL Engines:

• Always use genuine gaskets/seals for leak repairs

• Replace crankcase ventilation components every 2nd oil change

• Monitor oil consumption between services