Description
CAT 314-8728 TRUNNION-GD
| CAT 314-8728 TRUNNION-GD |
| CAT 115-1422 BEARING |
| CAT 362-3502 BUSHING |
| CAT 539-2442 BEARING-NEED |
| CAT 2W-8060 PLUG A |
| CAT 9T-3876 55mm Inner Diameter Tapered Roller Bearing |
| CAT 2H-2330 BEARING |
| CAT 231-4088 BEARING |
The CAT 314-8728 YM trunnion is a Caterpillar General Duty original trunnion, suitable for the articulation parts of the working devices of loaders, excavators, and other equipment. It connects components such as the boom, stick, and rocker arm, bearing loads and ensuring stable rotation of the articulated mechanism; it is a key load-bearing component in the articulation system of construction machinery.
Core Technical Parameters
Item Details
Part Model: CAT 314-8728 YM Trunnion (General Purpose, Single Component)
Material: High-strength alloy steel (tempered and surface hardened, HRC 55-60), suitable for medium to light load conditions, possessing good strength and wear resistance.
Key Dimensions: Diameter approx. 60-80mm, Length approx. 120-160mm, Weight approx. 5kg (subject to actual product/manual), with mounting threads or locating grooves at both ends, precise tolerances to ensure assembly accuracy.
Compatible Models: Loaders 930M/950M, Excavators 312E/320D2, Graders 140M, etc., used for hinge points such as boom and frame, stick and boom, rocker arm and connecting rod.
Performance Characteristics High-strength, resistant to bending and impact, low-friction, and compatible with bushings, suitable for light to medium loads and regular operating frequencies. Highly versatile and easy to install.
Core Functions:
* **Load Bearing and Transmission:** As the core load-bearing component of the articulated joint, it transmits loads during boom lifting, stick extension, and other operating conditions, ensuring efficient power transmission of the working device.
* **Articulated Rotation Positioning:** In conjunction with bushings and bearings, it provides a precise rotation center for the articulated mechanism, ensuring the movement accuracy of components such as the boom and stick, and preventing misalignment and jamming.
* **Structural Connection and Stability:** Connects the working device to the chassis and various components of the working device, enhancing structural integrity, reducing stress concentration at the articulated joint, and protecting related components.
* **Wear Protection:** Surface hardening treatment reduces friction and wear with bushings, extending the service life of itself and surrounding components such as bushings and pins.
Installation and Maintenance Points:
* **Installation Specifications:** Clean the trunnion, mounting holes, and mating parts, removing oil, rust, and impurities. Check the trunnion for cracks and deformation, and ensure the mounting hole ovality is within acceptable limits.
Use specialized tooling for positioning and installation, and tighten the nuts/bolts according to the torque requirements in the equipment manual to ensure a secure and reliable connection between the trunnion and the component.
After installation, check the flexibility of rotation at the hinge joint, and apply the specified grease (such as lithium-based grease) to ensure adequate lubrication and reduce friction.
Maintenance Recommendations: Every 800-1000 working hours, check the trunnion for wear, cracks, or deformation; check the hinge joint for looseness, abnormal noise, or leakage.
If the trunnion is found to have excessive wear (radial wear > 0.5mm) or shows cracks or deformation, replace it immediately to avoid malfunctions of the working device.
