4D1577 NBR O-Ring for Caterpillar Equipment — SKU 4D1577

The 4D1577 is an NBR rubber O-ring used as an axial or radial seal in Caterpillar equipment. It is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The seal is used in Caterpillar earthmoving compactors and Caterpillar engine-machine applications. Its function is to seal a mating connection and limit the passage of fluids or contamination where the O-ring is installed.

Fitment

The 4D1577 O-ring is listed for the following Caterpillar equipment models and machine series:

• Caterpillar 815B earthmoving compactor
• Caterpillar 815F earthmoving compactor
• Caterpillar 815F II earthmoving compactor
• Caterpillar 816F earthmoving compactor
• Caterpillar 816F II earthmoving compactor
• Caterpillar 826C earthmoving compactor
• Caterpillar 3116 engine-machine application
• Caterpillar 3126B engine-machine application
• Caterpillar 3176C engine-machine application
• Caterpillar 3196 engine-machine application

Fitment is determined by the Caterpillar equipment model and the seal location or connection in which the O-ring is installed. The model list includes both earthmoving compactor applications and engine-machine applications.

Cross-reference numbers

Part number formats 4D1577 and 4D-1577 identify the same listed O-ring. SAE AS568 dash size -281 is the dimensional designation specified for this seal.

Specifications

The sealing element is made from nitrile rubber and is specified with a hardness of 75 Shore A. The supplied technical data identifies the part as a black, uncoated O-ring with a 0.14-inch cross-section diameter and AS568 -281 designation.

The listed dimensions are 15.24 cm in length, 12.7 cm in width, and 2.54 cm in depth. The listed weight is 0.1 lb. The product is supplied as an O-ring seal; no additional components or installation hardware are specified.