Bolting and Torquing Procedure:
This is a critical step. Incorrect torque can lead to bolt failure or bearing distortion.
Use New Bolts: Always use new, genuine high-strength mounting bolts, nuts, and washers.
Lubricate Threads: Lightly lubricate the bolt threads and contact faces of the washers as specified in the manual (often with engine oil).
Sequential Torquing: Tighten the bolts in a star or cross pattern sequence, as specified by Caterpillar. This ensures even clamping force and prevents distortion of the bearing.
Multi-Stage Torquing: The procedure typically involves multiple stages:
First Pass: Tighten all bolts to a preliminary torque value (e.g., 50% of final torque).
Second Pass: Tighten all bolts to the final specified torque value.
Angle-Torque (if specified): Some procedures require a final turn (e.g., 90 or 120 degrees) after the final torque to ensure proper bolt stretch. You must follow the exact procedure from the official Caterpillar service manual for the 323D.
This 227-6083 slewing bearing is used for 323D 320D 320C excavator.
Related part number:
3B-8489
227-6071
148-4685
