5M3947 Shaft-Planetary for Caterpillar

The 5M3947 Shaft-Planetary is a shaft component for final drive and swing assemblies used on Caterpillar equipment. The equipment manufacturer associated with this part is Caterpillar. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified by the Caterpillar reference number 5M3947 and is listed for the Final Drive & Swing Components category. The available product data identifies the component as a planetary shaft, but does not provide a specific Caterpillar machine model or series list. Fitment should therefore be verified by matching the part number and the dimensions with the component installed on the machine.

The part name describes its function as a shaft used within a planetary mechanism. In heavy equipment final drive and swing systems, planetary components are installed as part of the mechanical power transmission assembly. The supplied information does not specify the exact internal position of the shaft, the number of planetary gears in the corresponding assembly, or the machine serial number range.

Cross-reference numbers

• 5M3947 — Caterpillar reference and product number.
• 5M-3947 — hyphenated presentation of the 5M3947 part number.
• 2236318 — listed aftermarket interchange and cross-reference number.

The numbers above identify the same shaft-planetary reference in the available product data. The formats 5M3947 and 5M-3947 differ only in the presentation of the number. Before installation, the reference number should be compared with the marking or parts documentation for the existing Caterpillar component.

Specifications

The dimensional values are reproduced from the available part data. The source lists the overall length in inches together with separate centimetre values for length, width and depth; these values should be checked against the removed shaft and the applicable Caterpillar parts documentation before assembly.

No information is provided for thread dimensions, splines, surface treatment, hardness, retaining components, installation position, or included hardware. The product data also does not state that seals, bearings, washers, gears, fasteners, or other final drive and swing components are supplied with the shaft. The item described here is the 5M3947 shaft-planetary only.