Key measures for maintenance and upkeep of low clearance electric hoists

Low clearance electric hoists are widely used in industrial scenarios with limited floor height due to their compact structure and high space utilization. To ensure its safe and efficient operation, a systematic maintenance system needs to be established from the following dimensions:

Daily inspection and cleaning

Appearance and structural inspection

Before daily operation: Check the gourd shell, chain/wire rope, and hook for cracks, deformation, or wear.

Example: If the opening degree of the hook exceeds 10% of the original size or the dangerous section wears out by 10%, it needs to be replaced immediately.

Electrical system testing

Confirm that the cable is not damaged, the wiring terminals are securely fastened, and the control buttons are sensitive and not stuck.

Key point: Check if the limit switch is effective to avoid equipment damage caused by lifting exceeding the limit.

Cleaning and rust prevention

Remove oil stains and metal shavings from the chain/wire rope, and apply rust proof oil to exposed metal parts.

Environmental adaptation: In humid or corrosive environments, it is necessary to increase cleaning frequency and use corrosion-resistant coatings.

Special maintenance of key components

Chain/Wire Rope Maintenance

Wear detection: Measure the diameter with a caliper, and replace it if the wear reaches 7% of the original diameter.

Anti distortion measures: Avoid diagonal pulling and hard pulling, and regularly adjust the tension of the chain/wire rope.

brake adjustment

Brake clearance: Check the clearance between the brake wheel and brake shoe every quarter to ensure it is within the range of 0.5-1mm.

Braking test: Immediately stop after lifting to a height of 1m without load, and the sliding distance should be ≤ 100mm.

Motor and controller

Heat dissipation inspection: Remove dust from the motor heat sink and ensure good ventilation.

Insulation test: Use a megohmmeter to test the insulation resistance of the motor every year, and it is qualified if it is ≥ 0.5M Ω.

Replacement of vulnerable parts and management of spare parts

Replace standard

Chain/wire rope: Replace immediately in case of wire breakage, corrosion, or permanent deformation.

Hook: Scrap when the dangerous section wears out beyond the standard, the opening degree increases, or cracks occur.

spare part inventory

Reserve commonly used spare parts (such as chains, brake pads, contactors) to ensure repair within 24 hours after a malfunction.

Suggestion: Sign a maintenance agreement with the supplier to shorten the procurement cycle of key components.

Safe operation and training

Operating specifications

Do not overload, tilt or forcefully pull the bracelet to avoid impact loads.

Example: A 1-ton hoist is not allowed to lift 1.2 tons of goods, otherwise it may cause chain breakage.

staff training

Organize operators to learn equipment principles, maintenance points, and emergency response every six months.

Assessment requirements: Those who pass the theoretical and practical exams will be issued an operating license.

Record and archive management

Maintain ledger

Record the maintenance time, content, replacement parts, and maintenance personnel information for each maintenance.

Example: Chain replacement on October 15, 2023, model DLHG-03-10m, to be carried out by Zhang San.

Lifetime tracking

Establish a lifespan record for vulnerable parts such as chains and wire ropes, and provide early warning of replacement cycles.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment