4F6123 Extension Spring

The 4F6123 Extension Spring is a hardware component used on Caterpillar equipment, including Caterpillar engines and machines, track-type loaders, and wheel-type skidders. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The spring is identified by the Caterpillar equipment part number 4F-6123 and is listed for the Caterpillar equipment models and machine series shown below. The supplied fitment information includes engine models, track-type loader models, and wheel-type skidder models.

Fitment

• Caterpillar 3116
• Caterpillar 3304
• Caterpillar 3306
• Caterpillar 963
• Caterpillar 963B
• Caterpillar 973
• Caterpillar 515
• Caterpillar 518C

Equipment categories specified for this part are Caterpillar engine-machine applications, Caterpillar track-type loader applications, and Caterpillar wheel-type skidder applications. Compatibility should be checked against the machine model and the installed part number before replacement.

Cross-reference numbers

• 4F6123
• 4F-6123

4F6123 and 4F-6123 are the two number formats provided for the same spring identification. The SKU for this product is 4F6123.

Specifications

The part is specified as an extension-type spring with a 90-degree tip orientation and a machined hook outline. The dimensional data includes the spring length designation H, outer diameter designation OD-A, wire diameter designation C, and package or component dimensions stated as length, width, and depth.

The listed applications cover Caterpillar 3116, 3304, and 3306 engine-related equipment, Caterpillar 963, 963B, and 973 track-type loader equipment, and Caterpillar 515 and 518C wheel-type skidder equipment. The fitment list contains the models supplied for SKU 4F6123.