Fault Phenomenon: Sinoboom TB26J telescopic boom aerial work platform water stain at the bottom of the radiator, coolant level decreases quickly.

Troubleshooting Process:
– Checked radiator: radiator has pinholes.
– Checked hoses: hoses aged and cracked.
– Checked water pump: water pump seal failed.
– Checked connections: connections loose.

Root Cause: The radiator has corroded pinholes or the hoses are aged and cracked.

Required Parts: Radiator assembly or coolant hoses.