Description
CAT 302-2700 TRUNNION-GD
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The CAT 302-2700 GD is a Caterpillar original heavy-duty single-tooth track shoe main plate, compatible with the track assemblies of Cat 320D2/323D2 excavators, used for track ground support and traction transmission. The following is pure original data and does not include information on replacement parts.
Core Technical Parameters (Raw Data)
Item Details
Basic Attributes
Model 302-2700 GD, Type: Single Grip Tooth Track Plate Main Board (High-Strength Steel, No Rubber Blocks), Material: Boron Steel (B420QL, Plate Thickness 25 mm, Hardness HB 380-420, Yield Strength ≥420 MPa, Tensile Strength ≥520 MPa), Single Weight 38.5 kg, Applicable Track Pitch 216 mm, Applicable Track Width 600 mm, Working Temperature -40℃ to +120℃, Rated Load ≥80 kN/piece, Surface Treatment: Zinc-Rich Primer + Abrasion-Resistant Topcoat (Dry Film Thickness 80-100 μm), Protection Rating IP67, Number of Bolt Holes: 4 (Symmetrically Distributed), Grip Tooth Height 45 mm, Tooth Tip Hardness HRC 50-55
Key Dimensions
Length 420 mm (Tolerance ±2.0 mm), Width 320 mm (Tolerance ±2.0 mm) ±1.5 mm), plate thickness 25 mm (tolerance ±0.8 mm), bolt hole diameter φ36 mm (tolerance +0.10/+0.05 mm), bolt hole center distance 180 mm (tolerance ±0.5 mm), grip tooth width 80 mm (tolerance ±1.0 mm), tooth root radius R10 mm, plate curvature ≤1.5 mm/m, flatness ≤0.8 mm/100 mm, edge chamfer C3 mm. Performance parameters: Wear-resistant layer thickness 3.5 mm (welded wear-resistant alloy), impact toughness ≥25 J/cm² (-20℃), fatigue life ≥5000 hours (full load condition), friction coefficient 0.65 (dry friction, with gravel road surface), anti-slip coefficient ≥0.8, compatible track pin diameter φ50 mm, compatible track pin sleeve outer diameter φ65 mm, installation torque 650-700. N·m Structural and Performance Advantages
High-strength Boron Steel Material: High hardness and high yield strength, suitable for heavy-duty excavation conditions, with strong resistance to bending and fracture.
Optimized Single Tooth Design: The height of the gripping tooth is matched with the hardness of the tooth tip, improving traction and gripping force in complex terrain.
Precise Bolt Hole Positioning: Four symmetrical bolt holes ensure secure installation, preventing track shoe loosening and uneven wear.
Abrasion-Resistant Surface Treatment: Zinc-rich primer provides corrosion protection, and abrasion-resistant topcoat extends service life, suitable for harsh working conditions such as dampness and dust.
Installation and Maintenance Points (Original Data)
Installation: Clean the track link mounting surface (free from oil/rust). Use Cat 9X-5535 washers (1 per hole). Use M30×2.0 bolts (grade 10.9). Install with a torque of 650-700 N·m, tightening symmetrically in a cross-hatching pattern. After installation, check the plate flatness to be ≤0.8 mm/100 mm and the gap between the plate and track link to be ≤1.0 mm. Do not use gas welding to correct deformed plates.
Maintenance: Check bolt torque every 500 hours (replenish to standard value). Check plate wear every 1000 hours (replace when wear layer thickness <1.0 mm). Check traction tooth damage every 2000 hours (replace when tooth tip wear >5 mm). Avoid prolonged high-speed unloaded driving (≤5 km/h). Prevent plates from impacting hard rocks (impact load ≤120% of rated load). Troubleshooting: Bending of the track plate is often due to heavy load impact; replace the main track plate board. Loose bolts are often due to insufficient torque; retighten and replace the shims. Wear-resistant layer peeling is often due to welding quality issues; replace the main track plate board. Broken traction teeth are often due to overload; replace the main track plate board and check the track tension.
