According to its performance, the extension arms are divided into fixed extension arms, sliding extension arms and telescopic extension arms. Daily maintenance: check, wash or change the air filter element after work; Clean the inside of the cooling system; Check and tighten the track shoe bolts; Check and appropriately adjust the reverse tension of the track; Check the air inlet heater; Replace the bucket teeth; Adjust the bucket clearance; Check the front window washer fluid level; Check and adjust the air conditioner; Clean the floor in the cab; Replace the breaker filter element (optional). When cleaning the inside of the cooling system, after the engine is fully cooled, slowly loosen the water injection port cover, release the pressure inside the water tank, and then drain the water; Do not clean the engine when it is working, as the high speed rotating fan may cause danger; When cleaning or changing the coolant, park the machine on level ground.