The mast chain drive system on a stacker needs regular inspection. The work covers chain condition, chain adjustment, and lubrication. Follow site safety rules during service.
1. Check chain condition
Check whether the left and right lifting chains have the same length. If the difference is more than 5 mm, adjust them again.
The chain should have no cracks or deformation. It should move freely. Elongation over 20 links should not exceed 8 mm.
If cracks, deformation, or elongation beyond the limit appear, replace the chain link.
Chain pin wear should not exceed 5% of the original link. Replace pins that are badly worn, bent, have fatigue cracks, or are heavily corroded.
If a chain pin, bushing, or sprocket is worn beyond the limit, Hansheng Automation can machine a replacement from customer drawings. We match material, tolerance, and surface treatment to the working conditions.
2. Adjust the chain
Mast lifting chains often use a double-chain layout. Adjust them at regular intervals so both chains have proper tension.
A chain that is too long reduces lift height. A chain that is too short can let the carriage run out of the inner mast channel and cause an accident.
Uneven tension between the two chains causes off-center loading and overload. This affects smooth lifting of the carriage and inner mast.
3. Lubrication
If the chain lacks lubrication, add oil or lubricant in time. Keep the chain surface lubricated.
Bearings and pivot points also need regular oiling. For example, oil them every 8 hours to keep the machine running well.
Follow these steps to keep the stacker running safely, extend service life, and reduce faults. During service, follow safety rules to prevent accidents.
