what’re the maintenance for the winch of gantry crane?
Observing the oil window of the reduction gearbox of gantry crane frequently to check that if the lubricant oil is within the specific range. Once the oil level is below the prescribed 
limit, fill it up timely.
If the gantry crane is not be used frequently, the sealed condition is good and the operation surrounding is favorable, replace the grease in the gearbox every six months. If the operation environment is worse, replace it every quarter. When found the water in the gear box, or the bubbles always occur in the surface of the grease, it proves that the oil has gone bad, replacing it immediately. The changed oil should be strictly in accordance with the instruction during the replacement, prohibiting the mixed usage.
The bearing bases on the both sides of the roll should be filled up the grease every two days. Smear the grease on the roll surface and the steel rope according to the actual conditions. The rolling bearings of the fixed, movable pulleys need to be added up the grease once a month.
Add up the oil for the rod axis of the braking system every week.
