CAT 110-4206 Universal Blade Trunnion

CAT 110-4206 is a universal blade trunnion assembly for Caterpillar bulldozers, used as the hinge pivot between the blade and the boom/C-frame, subjected to heavy loads and frequent oscillations. The following is raw data only, without replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 110-4206; Type: Shovel Trunnion Assembly (including shaft + bushing + retaining ring); Material: Shaft is high-strength alloy steel (4140 tempered); Bushing is tin bronze (CuSn12); Weight: 18.2 kg (40.1 lbs); Operating Temperature: -40℃ to +100℃; Shaft Surface: Nitrided; Hardness: HV 650-750; Bushing Hardness: HB 90-110; Lubrication Method: Grease lubrication; Rated Life: ≥8000 hours (standard operating conditions)

Key Dimensions (Metric/Imperial):
Shaft Diameter: 82.55 mm (3.250 in); Shaft Length: 355.60 mm (14.000 in); Mounting Hole Diameter: 82.60 mm (Clearance: 0.05 mm); Bushing Inner Diameter: 82.55 mm; Bushing Outer Diameter: [Missing information] 95.25 mm diameter, bushing width 50.80 mm, M24×2 threads at both ends of the shaft, shoulder diameter 95.00 mm, chamfer 1.5×45°, coaxiality ≤0.02 mm
Matching and Performance Parameters: Fits shaft hole H7 tolerance, bushing-shaft clearance 0.03-0.06 mm, rated radial load ≥220 kN, rated axial load ≥45 kN, maximum allowable swing angle ±15°, swing frequency ≤12 times/minute
Structure and Adaptability Characteristics: Integrated structure: one-piece shaft + double bushings + elastic retaining ring, easy installation, self-lubricating bushing design reduces maintenance frequency, suitable for heavy-duty swing under harsh working conditions.

Material and Surface Treatment: Shaft body 4140 tempered + nitrided, fatigue-resistant and wear-resistant; tin bronze bushing has good friction reduction properties, suitable for dusty, muddy and other polluted working environments, protection level IP54.

Positioning and Anti-loosening: Shoulder positioning + elastic retaining ring for anti-dislodgement; threaded end for fixation; adaptable to multi-angle adjustment needs of blade lifting and tilting, ensuring operational accuracy.

Compatible Models and Application Scenarios

Bulldozers: General-purpose blades for small and medium-sized bulldozers such as D3K2, D4K2, and D5K2; bears radial load and swing positioning during blade operation; suitable for earthmoving and bulldozing operations.

Special Applications: Adapted to the blade/scraper hinge parts of loaders and graders in the same series, meeting the needs of heavy loads and frequent angle adjustments.

Installation and Maintenance Points (Original Data)

Installation: Clean the shaft, bushing, and mounting holes, ensuring no iron filings or oil contamination. Shaft hole dimensions conform to H7 tolerance. Bushing pressing force 5-8 kN, ensuring coaxiality ≤0.02 mm.

Fill with NLGI Grade 2 extreme pressure lithium-based grease, ensuring unobstructed grease channels. After installation, the elastic retaining ring should be in place. Thread preload torque is 280-320 N·m.

Maintenance: Check clearances every 500 hours. Replace bushings immediately if wear clearance > 0.30 mm. Replenish grease every 800 hours; under severe operating conditions, reduce this to 300 hours/cycle.