4W8091 Thrust Bearing STD Main for Caterpillar

4W8091 is a standard-size engine main thrust bearing for Caterpillar equipment. It is used with Caterpillar 3208 engines and with the listed Caterpillar machines powered by or equipped with this engine family. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is listed in the Engine Bearings category. The designation “STD” identifies the standard bearing size, while the product description identifies the component as a main thrust bearing. The supplied application data covers several Caterpillar machine types, including road rollers, excavators, cold milling machines, forest machines, wheeled tractor-scrapers, truck engines, industrial engines, generator equipment and ship equipment.

Fitment

• Road rollers: Caterpillar CB-614, CP-553, CS-551, CS-553 and PS-500.
• Engine and generator equipment: Caterpillar 3208.
• Wheeled tractor-scraper: Caterpillar 613C.
• Truck engine: Caterpillar 3208.
• Ship equipment: Caterpillar 3208.
• Excavators: Caterpillar 225, 225B, 225D, 229 and 231D.
• Industrial engine: Caterpillar 3208.
• Cold milling machines: Caterpillar 3208, 3412, PR-1000 and PR-1000C.
• Forest machine: Caterpillar 227.

Fitment should be checked by matching the machine model, engine designation and bearing size with the equipment service information before installation. The application list identifies the compatible Caterpillar models and equipment types supplied for part number 4W8091; it does not specify individual engine serial-number ranges.

Cross-reference numbers

• 4W8091 — product and interchange reference.
• 4W-8091 — hyphenated part-number format.
• 4W8091T — Caterpillar reference code listed for this bearing.

The references above are the numbers provided for identification of this part. They should be compared with the number stamped on the removed bearing, the engine parts information and the required bearing size.

Specifications

The listed dimensions and weight are product data for the supplied bearing reference. The description does not specify bearing material, coating, shell thickness, journal clearance, crankshaft dimensions, fasteners or additional components included with the part.