Load Haul Dump Machines Air Conditioning and HVAC Repairs

HVAC systems on load haul dump machines

Compact cooling unit suited to a low-profile cab, with filtered ventilation appropriate to underground operation. Confined headings, restricted airflow, diesel heat and high humidity make cabin cooling and ventilation harder than on surface equipment.

Common faults we find on load haul dump machines

• Restricted airflow
• Evaporator fouling
• Condenser restriction in confined mountings
• Ventilation fan failure

Diagnostic process

• Operator interview and fault confirmation with the machine running under load
• Visual inspection of condenser, belts, hoses, wiring and cabin filters
• High and low side pressure testing against the manufacturer's specification
• Electronic leak detection, dye tracing or nitrogen pressure testing where required
• Electrical fault finding on clutches, relays, pressure switches and control modules
• Written findings, parts list and repair recommendation before work proceeds

Repair approach

• Correct recovery of refrigerant before any component is opened
• Compressor, condenser, evaporator, drier, valve, blower and harness repairs or replacement
• System flushing and drier replacement after contamination or compressor failure
• Vacuum, leak hold test, charge by weight and oil balance to specification
• Function test across the full temperature range with cabin outlet readings recorded

Preventative maintenance recommendations

Frequent core and filter cleaning, ventilation fan verification and attention to drain function in humid conditions.