CAT 103-9685 METAL CON-RO

CAT 103-9685 is a Caterpillar original connecting rod bearing assembly (.020 enlarged), suitable for the 3046 diesel engine. The following is purely accurate information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 103-9685 (1039685) Connecting Rod Bearing Assembly (.020)

Part Type: Engine connecting rod bearing, suitable for high-speed rotation and alternating load conditions between the connecting rod big end and crankshaft connecting rod journal of a reciprocating internal combustion engine, bearing impact loads + high speed, friction reduction and wear resistance, transmitting power

Material: Steel backing (low carbon steel), intermediate layer copper-lead alloy (CuPb24Sn4), plating 0.005-0.01mm ternary alloy (Sn-Cu-Zn), oil groove + oil hole design, surface roughness Ra≤0.4μm

Key Dimensions: Inner diameter 69.85mm (2.7500in), outer diameter 76.20mm (3.0000in), thickness 3.175mm, width 38.10mm, enlarged grade .020 (0.020in), compatible with journal φ69.85mm

Structural Features: Rigid steel backing, copper-lead alloy friction reduction, ternary alloy coating for wear resistance, with positioning lip, through-hole oil groove + oil hole supply, compatible with connecting rod big end interference fit, rated dynamic load 120kN, static load 280kN, coefficient of friction μ≤0.04 (oil lubrication)

Compatible Structure: 3046 engine connecting rod bearing assembly, 6 pieces/set, used with connecting rod bolts (103-9686), installation clearance 0.020-0.030mm

Applicable Operating Conditions: Diesel engine connecting rod area, speed ≤3000rpm, burst pressure ≤18MPa, operating temperature -30℃ to 150℃, compatible with oil lubrication (SAE) 15W-40) Compatible Models and Assemblies

Excavators: CAT 315, 315B, 315C (3046 engine connecting rod bearing assembly)

Loaders: CAT 906, 907, 908 (3046 engine connecting rod bearing assembly)

Bulldozers: CAT D3C, D4C (3046 engine connecting rod bearing assembly)

Compatible Assemblies: 3046 engine connecting rod bearing assembly (6 pieces/unit)

Installation and Fitting Points
The connecting rod big end bore should be clean and free of burrs. The bearing shell should be free of deformation and scratches. The locating lip should match the connecting rod locating groove. Do not strike the edge of the bearing shell.

Before installation, check that the bearing shell plating is free of peeling, the oil hole is aligned with the connecting rod oil passage, the journal-bearing shell clearance is 0.020-0.030mm, and the surface roughness Ra≤0.8μm.

Tighten the connecting rod bolts to the specified torque (85-95 N·m), tightening them in three crisscrossing stages. After assembly, the connecting rod should swing smoothly without jamming or abnormal noise.

Use a special tool to press out the connecting rod bolts during disassembly. Do not pry the bearing shells. When replacing bearing shells, replace all 6 shells as a set, ensuring consistent clearance.