1912521 Sun Gear for Caterpillar Excavators

1912521 is a sun gear used in the final drive assemblies of Caterpillar excavators. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified as a gear-sun and is intended for the Caterpillar excavator models listed below. The supplied dimensions are provided in both imperial and metric units where available.

Fitment

• Caterpillar 325C excavator
• Caterpillar 328D LCR excavator
• Caterpillar 330C excavator
• Caterpillar 330C FM excavator
• Caterpillar 330C L excavator
• Caterpillar 330C LN excavator
• Caterpillar 330C MH excavator
• Caterpillar 330D excavator
• Caterpillar 330D L excavator
• Caterpillar 330D LN excavator

Cross-reference numbers

• 1912521
• 191-2521

Part number 1912521 and the formatted number 191-2521 identify the same sun gear reference. Verify the part number and machine configuration against the equipment parts documentation before installation.

Specifications

The listed width and depth are 11.25 cm each. The metric length of 21.27 cm corresponds to the supplied length specification, while the imperial dimensions are listed separately as an outer diameter of 4.136 inches and a length of 6.062 inches.

Application information for this part covers the Caterpillar 325C, 328D LCR, 330C, 330C FM, 330C L, 330C LN, 330C MH, 330D, 330D L, and 330D LN excavator models. The part number, machine model, and component dimensions should be matched before fitting.