As a key traveling component of loaders, tire wear directly affects operational safety, efficiency, and equipment stability. Judging the wear level requires a comprehensive assessment based on multiple dimensions such as tread pattern depth, tire structural condition, and application scenario requirements. Replacement standards must adhere to industry norms and safety baselines. The specific methods are as follows:

I. Methods to Judge Loader Tire Wear

For loader tires (including pneumatic tires and solid tires, with common pneumatic tires as an example), judging wear focuses on three core indicators: tread pattern depth, abnormal wear patterns, and structural damage. This can be achieved through a combination of "visual inspection and tool assistance":

1. Tread Pattern Depth Detection (Core Indicator)

The main functions of tread patterns are to enhance grip (especially on muddy or slippery ground) and drain water/mud. Insufficient tread depth will directly lead to a sharp increase in the risk of slipping.

• Tool Measurement Method: Use a tire tread depth gauge to measure 3-4 points at different positions on the tire tread (center of the tread crown, both sides of the tread shoulder) to avoid interference from local wear, then calculate the average depth:

• New Tire Tread Depth: The tread depth of new pneumatic tires for ordinary loaders is usually 15-25mm (heavier-duty models may have deeper treads, up to over 30mm).

• Wear Warning Value: When the average tread depth drops to 5-8mm, the tire enters a "key monitoring state" (adjust based on the operating site: use the upper limit of 8mm for muddy/slope operations, and the lower limit of 5mm for hard-ground leveling operations).

• Critical Wear Value: When the tread depth is less than 3mm, grip decreases significantly, and replacement planning must be initiated immediately.

• Simple Comparison Method: Some tires are designed with "wear indicator bars" (raised rubber bars at the bottom of tread grooves, approximately 3mm in height). When the tread pattern wears down to align with these indicator bars, the tire reaches the critical wear state, and no additional tools are needed for judgment.

2. Judgment of Abnormal Wear Patterns (Hidden Risks)

In addition to normal uniform wear, "abnormal wear" often indicates equipment failures or operational issues, and the root cause must be identified simultaneously. Common types and judgment standards are as follows:

3. Wear Judgment in Special Scenarios

• Muddy/Slippery Ground: If the tires frequently "spin (idle) without the vehicle moving" during operations, and factors such as bucket overloading or excessive ground slope are ruled out, it indicates the tread pattern can no longer provide effective grip, and the tread depth must be checked.

• Hard Rock/Gravel Ground: If the tread shows obvious "edge wear" (uneven wear on the tread shoulder) or "serrated wear", it may be due to low tire pressure (excessive contact area between the tread and hard objects). Tire pressure testing should be combined to determine if replacement is needed.

II. Standards for Loader Tire Replacement (Dual Baselines of Safety and Efficiency)

The tire must be taken out of service and replaced immediately if it meets any of the following conditions, to avoid equipment failures or safety accidents:

1. Tread Pattern Depth Meets Replacement Criteria (Mandatory Replacement)

• Tires for ordinary earthwork operations: Tread depth ≤ 3mm;

• Tires for muddy/slope operations: Tread depth ≤ 5mm (due to higher grip requirements, replacement must be advanced);

• Solid tires (no tread depth indicators): When the tread rubber wears down to expose the underlying cords or metal layers, or large-area cracks appear on the surface (depth exceeding 2mm).

2. Unrepairable Structural Damage (Direct Replacement)

• Penetrating cracks on the sidewall (crack length exceeding 50mm, depth exceeding 3mm) or "bulges" (bulge diameter exceeding 50mm), indicating broken tire carcass cords—continued use may cause tire blowouts;

• Large-area missing chunks or cracking on the tread (missing area exceeding 100cm²), leading to uneven ground contact and potential steering deviation;

• Seal failure at the junction of the hub and tire (pneumatic tires leak continuously, with pressure dropping by over 20% within 24 hours after repair), or deformed tire beads (unable to fit tightly with the hub).

3. Functional Failure Caused by Abnormal Wear (Recommended Replacement)

• Single-sided wear (wear difference between the tread shoulder and tread crown exceeding 5mm): Even if the tread depth does not meet the replacement criteria, it will cause heavy steering and driving deviation. Long-term use will accelerate wear of the front axle and steering system—tires must be replaced after correcting the alignment issue;

• "Serrated wear" on the tread (serrated edges on the tread pattern): Causes severe noise and reduces grip by over 30%, affecting operational efficiency—replacement is recommended;

• Aging wear (tires used for over 5 years, or rubber showing "hardening and cracking"): Even if the tread depth is sufficient, the impact resistance and tear resistance of aged rubber decrease significantly, making blowouts likely under heavy loads—mandatory replacement is required.

4. Industry Norms and Safety Standards (Hard Requirements)

According to Earth-Moving Machinery - Safety - Part 1: General Requirements (GB/T 25684.1-2010):

• The tread pattern depth of loader tires shall not be less than 3mm (for general operating scenarios);

• Tires shall not have "cracks, bulges, or missing chunks that affect safety"—otherwise, their use is prohibited.

III. Supplementary Recommendations: Auxiliary Measures to Extend Tire Life

While judging wear and planning replacements, daily operations can reduce abnormal wear:

• Regularly check tire pressure (for pneumatic tires) to avoid overinflation (causing center wear) or underinflation (causing single-sided/local wear);

• Avoid crushing sharp objects (gravel, steel bars) and clear debris from the work site before operations;

• Slow down when turning and avoid forced driving with the steering wheel "fully turned" (reducing tread shoulder wear);

• When storing tires for a long time, support them off the ground and avoid direct sunlight (slowing rubber aging).

Through the above methods, the wear status of loader tires can be accurately judged—avoiding "waste from premature replacement" and preventing "safety risks from overuse", thus ensuring operational efficiency and equipment safety.