How to repair the caster brake system when it fails?

When the caster brake system malfunctions, the problem needs to be identified based on the specific symptoms and repaired accordingly:

 

1. Common Troubleshooting

 

Ineffective Braking (Wheel Still Turns):

Cause: Brake pad is worn/slippery, connection is loose, or it is stuck.

Handling: Replace thin/slippery brake pads; tighten or replace broken connecting screws; remove stuck debris and apply a small amount of lubricant to moving parts (do not apply oil to the brake pads).

 

Brake Not Returning (Wheel Lock):

Cause: Broken/loose return spring, rusted and stuck components, or insufficient brake pad clearance.

Handling: Replace the broken spring or adjust/replace the loose spring; polish away any rust and lubricate moving parts; adjust the brake pad clearance to 0.5-1mm.

 

Unilateral Braking (Equipment Misalignment):

Cause: Unilateral brake pad is worn, connection is loose/deformed, or installation height is uneven.

Handling: Replace unevenly worn brake pads; tighten loose parts, replace worn bushings, or correct/replace deformed rods; adjust both brake pedals to the same height.

 

Abnormal Brake Squeak:

Cause: Impurities between the brake pad and wheel, misalignment, or wear on the connecting shaft.

Handling: Remove impurities; align the brake pad with the wheel center; replace worn bushings or connecting shafts.

 

2. Repair Precautions

Tools: Use matching tools. Rusted parts can be treated with rust remover first.

Spare Parts: Replacement parts must be of the same model, original manufacturer, or certified.

Safety: Ensure the equipment is secure before repair (unloaded, on flat ground, and heavy equipment requires securing). Wear gloves.

Testing: After repair, repeatedly test brake sensitivity and reset, and perform simulated load tests.

 

3. Situations Required for Complete Replacement: The entire brake system should be replaced in the following situations:

Broken brake lever or bracket.

Severe deformation between the connecting shaft and bracket.

Frequent failure after multiple repairs.

Principle: Accurately identify the fault point and avoid blind disassembly. B2B or complex equipment is recommended for professional repair to ensure safety standards.