Item 1 – Caterpillar Bearing Cap

Identification

• CAT Part Number: 123‑4011
• Description: CAP‑BEARING
• Material: Carbon steel

Function

Heavy‑duty bearing cap designed to:

• Secure push arm bearings to track roller frames
• Support high-load articulation points

Key Dimensions (CAT data)

• Inner Diameter: 10.71 in
• Overall Length: 21.34 in
• Overall Width: 7.64 in

Typical Applications

• CAT Track-Type Tractors (D11, D11R, D11T)

Item 2 – Caterpillar Hydraulic Tank Enclosure Cover

Identification

• CAT Part Number: 209‑9254
• Description: COVER AS

Function

Steel hydraulic tank enclosure door used to:

• Protect hydraulic tank from debris and impact
• Allow inspection and service access
• Seal tank area from environmental exposure

Material

• Structural steel / alloy steel (manufacturer specification)

Typical Applications

• CAT Track-Type Tractors (D8T)