Sun Gear 9U3125 for Caterpillar Equipment

Sun gear for final drive and swing component assemblies used in Caterpillar equipment. The part is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The supplied application data identifies this gear for Caterpillar skidders, wheel bulldozers, wheel-type loaders, ground compactors for earthwork, and articulated dump trucks. Compatibility should be checked against the machine model, serial number, and the dimensions of the removed component before installation.

Fitment

• Skidding machines on wheels (skidders): 528B, 530B
• Wheel bulldozer: 814B
• Wheel-type loaders: 966D, 966E, 966F
• Ground compactors for earthwork: 815B, 816B
• Articulated dump trucks: 735, D25D, D30D, D350D, D350E, D350E II, D400D, D40D

The listed applications cover several Caterpillar equipment types and model series. The part is identified as a sun gear within the final drive and swing components category. The available data does not specify a particular machine position or a complete assembly number, so installation location must be confirmed from the applicable parts documentation for the machine.

Cross-reference numbers

• 9U3125
• 9U-3125

9U3125 and 9U-3125 are the two catalog number formats provided for this part. The hyphenated and non-hyphenated formats are included for parts identification and catalog searches.

Specifications

The dimensional information is provided in both inches and centimetres where available. The listed length values are supplied in two measurement units and may reflect catalogue rounding or measurement-system conversion. Confirm the gear dimensions, tooth engagement, and the applicable machine documentation before fitting.