Common Faults & Checks for Industrial Cooling Systems in Water Well Drilling Rig

Poor heat dissipation (shown by abnormal temperature rise):
Possible causes: Clogged radiators, slow fans, faulty pumps, low coolant.
Check steps: First, top up coolant if low. Clean radiator debris; flush with high-pressure water. If still hot, check fan belt tightness and pump 叶轮 wear. A rig’s fan belt slipped, hitting 70% speed. New belt fixed it.

Coolant leaks:
Possible causes: Cracked pipes, loose joints, broken radiators, old gaskets.
Check steps: Look for leaks on the ground. Inspect pipe joints and welds. Pressurize the system (0.3-0.5MPa) to find leaks. A rig’s hydraulic oil cooler leaked at a weld. Pressure test found bubbles; welding fixed it.

Pipe blockages and thermostat faults:
Blockages: Too many impurities, scale, or ice (in cold).
Check steps: Thaw ice slowly in cold. Blow pipes with air or flush with cleaners at room temp. A rig’s old coolant caused scale; citric acid restored 80% efficiency.
Thermostat faults: Slow warming or constant high temps (stuck open/closed).
Check: Put thermostat in hot water; replace if it doesn’t open/close. A rig’s stuck thermostat hit over 100℃; replacement worked.