Articulated Dump Trucks Air Conditioning and HVAC Repairs

HVAC systems on articulated dump trucks

Engine-driven compressor with flexible lines crossing the articulation point, cab-mounted evaporator and pressuriser fan. Refrigerant and electrical lines crossing the articulation joint are exposed to constant flexing and are a frequent leak and chafe point.

Common faults we find on articulated dump trucks

• Leaks at flexing hose sections
• Chafed wiring at the articulation
• Condenser stone damage
• Poor cooling on gradients

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

Inspect flexing hoses and harnesses specifically, and clean condensers with attention to mud packing between fins.