Road rollers may encounter various operational failures that impact work efficiency. Below are 8 common failure types, including cause analysis and solutions, covering mechanical, hydraulic, and electrical systems.

1. Engine Fails to Start or Lacks Power

Possible Causes:

• Dead battery/corroded terminals

• Fuel system issues (clogged filter, air in fuel lines)

• Severely clogged air filter

• Faulty fuel injectors/spark plugs (diesel/gasoline engines)

Troubleshooting:
✅ Electrical Check:

• Measure battery voltage (≥12.6V), clean terminals, test jump-start.
  ✅ Fuel System:

• Bleed air from fuel lines (manual priming for diesel engines).

• Replace fuel filter, check fuel pump pressure.
  ✅ Air Intake:

• Clean/replace air filter; inspect turbocharger (if equipped).

2. Vibration System Failure

Possible Causes:

• Faulty vibration switch/wiring

• Low/contaminated hydraulic oil

• Damaged eccentric bearing

• Hydraulic motor/pump failure

Troubleshooting:
✅ Electrical Test:

• Use a multimeter to check switch circuit continuity.
  ✅ Hydraulic System:

• Check oil level, replace clogged filters, bleed air.

• Test hydraulic pump pressure (refer to manual).
  ✅ Mechanical Parts:

• Inspect eccentric bearings (replace if noisy/loose).

• Check for broken vibration drum bolts.

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3. Weak Travel or Deviation

Possible Causes:

• Uneven tire pressure (pneumatic rollers)

• Brakes not fully released

• Internal leakage in travel motors

• Low oil in gearbox/chain drive

Troubleshooting:
✅ Tires/Drums:

• Adjust tire pressure; check drum wear symmetry.
  ✅ Brakes:

• Release parking brake; inspect brake caliper return.
  ✅ Hydraulic Test:

• Compare left/right motor pressures; repair if uneven.
  ✅ Drive System:

• Lubricate chains; refill gearbox oil.

4. Hydraulic Oil Overheating

Possible Causes:

• Degraded/low hydraulic oil

• Clogged radiator

• System overload (relief valve pressure too high)

Troubleshooting:
✅ Oil Check:

• Replace contaminated oil; flush tank; use correct oil grade.
  ✅ Cooling System:

• Clean radiator fins; check fan belt tension.
  ✅ Pressure Adjustment:

• Test system pressure; adjust relief valve to specs.

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5. Abnormal Drum/Tire Wear

Possible Causes:

• Worn/missing drum scrapers

• Incorrect tire pressure

• Sharp debris in compacted material

Troubleshooting:
✅ Drum Maintenance:

• Replace scrapers; repair deep scratches (weld/grind).
  ✅ Tire Care:

• Maintain proper pressure (e.g., 0.35 MPa); avoid uneven wear.

• Clear rocks/rebar from worksite.

6. Brake Failure

Possible Causes:

• Low/contaminated brake fluid

• Worn brake pads/discs

• Air leaks (air-brake models)

Troubleshooting:
✅ Hydraulic Brakes:

• Refill fluid; bleed air; replace pads.
  ✅ Air Brakes:

• Fix air leaks; replace desiccant.

7. Dashboard Warnings (Oil/Hydraulic/Temperature)

Possible Causes:

• Faulty sensors

• Actual oil pressure/overheating

Troubleshooting:
✅ Sensor Test:

• Short-circuit sensor wire; if alarm stops, replace sensor.
  ✅ Actual Values:

• Check oil pressure (≥0.1 MPa at idle).

• Verify temperature with infrared thermometer.

8. Poor Compaction (Low Density)

Possible Causes:

• Incorrect vibration frequency/amplitude

• Excessive rolling speed

• Improper material moisture (soil compaction)

Troubleshooting:
✅ Parameter Adjustment:

• Use low frequency + high amplitude for clay; high frequency + low amplitude for gravel.

• Limit speed to 2–4 km/h.
  ✅ Material Handling:

• Keep soil moisture within optimum ±2% range.

Quick Troubleshooting Flow

Symptom → Check electrical/hydraulic systems → Test pressure/sensors → Inspect mechanical parts → Repair/replace

Preventive Tips

• Pre-shift inspection: 10-minute visual check (fluids, tires, fasteners).

• Maintenance logs: Track failures to reinforce weak points.

• Operator training: Avoid abrupt stops/overloading.

Following systematic diagnostics and maintenance can reduce >80% of common failures, ensuring efficient roller operation.