1505844 Backup Ring for Caterpillar Excavators

1505844 is a backup ring used in the transmission seal ring assembly of Caterpillar excavators. It is intended for Caterpillar 318B, 318C, 319D L, and 319D LN machine models. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The component is listed as a transmission seal ring backup ring. Its dimensional data identifies a circular ring with an inner diameter of 4.09 inches and a nominal cross-sectional height and width of 0.12 inches. The part is manufactured from polyamide.

Fitment

• Caterpillar 318B excavator
• Caterpillar 318C excavator
• Caterpillar 319D L excavator
• Caterpillar 319D LN excavator

The listed fitment applies to the equipment models specified above. Compatibility should be checked against the machine model, serial number, and the installed seal assembly before replacement when several configurations are available for the same excavator series.

Cross-reference numbers

• 150-5844
• 1505844

150-5844 is the catalog number format associated with SKU 1505844. The two number formats identify the same listed backup ring: one uses a hyphen and the other is written without the separator.

Specifications

Polyamide is the specified material for this ring. The material description indicates resistance to fuel, oils, and lubricants. Polyamide compositions can differ in their resistance to mechanical loads and elevated temperatures; the material designation supplied for this part is polyamide.

The dimensions and material information are reference data for identification. The listed cross-sectional height and cross-section width are both 0.12 inches. The inner diameter is stated separately in inches, while the listed overall length, width, and depth are provided in centimetres.

Colour is not a specification for identification and may differ from a product image. The supplied data does not specify an installation position beyond the part being identified as a transmission seal ring backup ring.