D3B Dozer Chain Track Link Excavator Track Link
1. Product Overview
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Compatible Model: Caterpillar D3B compact crawler bulldozer (or modified excavator versions of similar tonnage).
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Track Type: Sealed & Lubricated (SALT) track chain, designed for medium-to-low load applications.
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Design Standard: Complies with Caterpillar TL (Track Link) series specification
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2. Core Specifications
2.1 Dimensional Data
|
Parameter |
Value (mm/inches) |
|---|---|
|
Pitch |
152.4 mm (6") |
|
Shoe Width |
300 mm (12") |
|
Link Thickness |
45±2 mm |
|
Bushing/Pin Diameter |
38.1 mm (1.5") |
|
Assembly Weight (per side) |
~250 kg (varies by shoe type) |
2.2 Material & Manufacturing
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Track Links: Forged high-manganese steel (Mn18Cr2), quenched, hardness ≥HRC55.
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Pins & Bushings: Alloy steel (42CrMo), medium-frequency induction hardened, hardness HRC58-62.
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Sealing System: Nitrile rubber (NBR) seals + lithium-based grease for dust/water resistance.
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3. Configuration Options
3.1 Track Shoe Types
| Type | Application | Features |
|---|---|---|
| Single-Grouser | Hard terrain, rocky conditions | High traction & wear resistance |
| Flat Shoes | Turf/asphalt protection | Minimizes ground disturbance |
| Wide Swamp Pads | Mud/wet soils | Extra width (400mm) to reduce sinking |
3.2 Link Quantity
- Standard for D3B: 39–41 links per side (varies by configuration).
4. Performance Features
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Durability: Service life up to 4,000–6,000 hours (under normal conditions).
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Maintenance Intervals: Grease replenishment every 500 hours, seal replacement at 2,000 hours.
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Compatibility: Interchangeable with similar models (e.g., D3C/D4B) after verifying pin dimensions.
5. OEM & Aftermarket References
Caterpillar Part Numbers:
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8J-7111 (Complete link assembly)
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3J-7357 (Pin & bushing kit)
6. Key Selection Notes
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Verify Machine Year: Early D3B models (pre-1980s) may use non-standard pitch (e.g., 5.5").
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Match to Application: Opt for wide swamp pads in wet conditions to reduce lateral stress on links.
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Genuine Part Identification: Look for "CAT" logo and laser-etched part numbers on link sides.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.