Description
CAT 1U-3582 TRUNNION
| CAT 1U-3582 TRUNNION |
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The CAT 1U-3582 is a Caterpillar integral heavy-duty trunnion for mini excavator/loader working devices. It provides swing support and axial positioning for the boom and stick, and bucket hinge points. It is compatible with 305.5E2/306E2 excavators and 906H/907H loaders. The following is professional structured information.
Core Parameters (Professional Version)
Project Details
Basic Attributes
Model 1U-3582, Quantity per unit: 2 pieces (symmetrically arranged on both sides of the hinge point), Fitting pin diameter: 50 mm, Matching bushing 1U-3583, Locking nut 8T-4121, Single weight: 5.8 kg, Includes trunnion body, positioning flange, and lubrication nozzle
Key Dimensions
Pin hole inner diameter: 50 mm (tolerance H7: 0–+0.025 mm), Trunnion outer diameter: 95 mm (tolerance g6: 0–-0.020 mm), Total length: 120 mm, Flange diameter: 110 mm (thickness: 10 mm, tolerance: ±0.1 mm), Lubrication hole: M8×1.25 (depth: 20 mm), Chamfers at both ends: 1×45° (tolerance: ±0.1 mm)
Material and Process
The trunnion body is made of 40Cr alloy steel, with overall quenching and tempering (hardness…) HB260–300), surface hardened (hardened layer depth 1.5–2.0 mm, surface hardness HRC50–55); positioning flange and body are integrally forged, end face flatness ≤0.02 mm
Performance Parameters: Rated radial load 180 kN, rated axial load 80 kN, operating temperature -20℃ to +120℃, compatible with Cat DEO-ULS hydraulic oil, lubrication cycle 500 hours, wear life ≥10000 hours (standard working conditions)
Compatible with Cat 305.5E2/306E2/307E2 excavators and 906H/907H/908H loaders, equipped with boom 16M-0013, stick 16M-0014, and pivot pin 8T-4120.
Installation and Maintenance Points: Before installation, clean the trunnion hole, pin, and mounting surface. Ensure the positioning flange aligns with the mounting surface (gap ≤ 0.03 mm). Align the lubrication nozzle with the lubrication channel. Tighten the lock nut to 200 N·m torque and apply thread-locking adhesive.
Maintenance Cycle: Every 500 hours, add Cat-specific lithium-based grease (the amount should overflow from both ends of the bushing). Check the bushing clearance (replace if radial clearance > 0.25 mm). Replace the dust seal immediately if damaged.
Troubleshooting: If there is abnormal noise/increased resistance at the hinge point, first check for trunnion wear, bushing failure, blocked lubrication channels, and loose nuts. Replace components and repair the mounting hole if necessary.
