I. Common Wear Parts and Failure Modes

Track Rubber/Steel Body Wear

• Rubber Tracks: Worn-out tread pattern, rubber cracking, exposed steel cords, side skirt cuts, joint debonding

• Steel Tracks: Worn-down track shoe lugs, increased pin/bushing clearance, cracked track links, deformed shoe plates

Wear of Associated Running Gear

Worn drive gear teeth, eccentric wear on idler flanges, loose bearings of track rollers/carrier rollers, and failure of the track tensioning mechanism—all of which will accelerate abnormal track wear.

II. Feasibility and Methods of Track Repair

Rubber Tracks (Replacement Primary, Repair Secondary)

• Repairable Scenarios: Superficial cracks, small-area scratches, local damage in non-load-bearing zonesTreatment: Clean and dry the surface, fill and cure with special rubber repair agent/cold-bonding adhesive for short-term emergency use.

• Non-repairable / Not Recommended for Repair: Exposed steel cords, broken joints, circumferential cracks, large-area debonding, penetrating damage.Repairs may lead to track detachment or fracture; direct replacement is required.

Steel Tracks (High Repairability)

• Pins/Bushings: Oversized clearance can be resolved via disassembly inspection, reversal, bushing insertion, or replacement to restore meshing.

• Track Shoe Lugs: Worn lugs can be hardfaced with wear-resistant alloy and re-profiled to extend service life.

• Crack Repair: Small cracks on non-critical load-bearing surfaces can be welded for reinforcement; cracks on main load-bearing areas require direct segment replacement.

• Deformed Track Links: Replace single links if straightening is ineffective; full track replacement is unnecessary.

III. Replacement Criteria

Rubber Track Replacement Thresholds

• Tread depth wear ≥ 70%, with significant loss of grip

• Through cracks, exposed cords, or debonded joints present

• Excessive track elongation, unable to tension even at full stroke of the tensioning mechanism

• Frequent derailment or jumping, failure to mesh properly after repair

• Service life exceeding 3 years or reaching the manufacturer’s rated mileage/hours with severe aging

Steel Track Replacement Thresholds

• Pin-to-bushing clearance exceeds 1.5–2 times the design value, causing severe tooth jumping and abnormal noise

• Track shoe lugs worn flat, unable to transmit driving force effectively

• Penetrating cracks, plastic deformation, or fracture of track links

• ≥3 damages per link, with repair cost approaching that of replacement

• Track runs off-center or derails at maximum tension, with severe concurrent wear on running gear

IV. Causes of Abnormal Wear and Prevention

Causes

• Improper tension: Over-tension accelerates rubber/pin wear; under-tension causes derailment and tooth jumping.

• Eccentric loading/center-of-gravity offset: Leads to overloading and uneven wear on one side of the track.

• Harsh road conditions: Prolonged travel on rocky/rebar-covered roads without slowing down causes cuts and impact damage.

• Steering habits: Frequent pivot turns under heavy load scrape rubber surfaces or erode steel chains.

• Neglected associated components: Worn drive/idler wheels scratch tracks, creating a vicious cycle.

Prevention

Adjust tension per working conditions; avoid overloading and sharp turns; promptly repair running gear; install guard plates on rocky sections; clean sediment and debris regularly.

V. Key Points for Replacement and Installation

• Model Matching: Pitch, width, and hole positions must align with the chassis drive/idler wheels.

• Re-tension after installation, test run for 10–15 minutes, and check for run-off, abnormal noise, and meshing.

• Lubricate pins and bushings after steel track replacement; keep rubber tracks away from oil products and sharp objects.

• Mixed installation of new and used links is only for steel track emergencies; full track sets must be replaced for long-term use to avoid uneven loading.

• Record working hours/mileage after replacement and establish a wear monitoring cycle.