CAT 20R-6263 Cat® Reman Valve Rocker Arm

Product Overview

The CAT 20R-6263 Valve Rocker Arm is a Genuine Cat® Reman OEM rocker arm assembly engineered for Caterpillar 3400 Series engines. Rocker arms are actuated by pushrods from the camshaft to open and close the engine valves, allowing the correct intake of air and fuel and the discharge of exhaust gases during engine operation. The 20R-6263 remanufactured rocker arm is rebuilt to Caterpillar’s original engineering specifications, incorporating all applicable engineering updates and rigorous quality testing to deliver like-new performance and reliability.

As part of the Cat Reman program, each rocker arm is thoroughly cleaned, inspected, remanufactured, and tested before leaving the factory. This provides a cost-effective alternative to a new component while maintaining OEM fit, function, and durability. The product is backed by the Caterpillar Limited Warranty applicable to Cat Reman parts.

Key Features

• Genuine Cat® Reman Valve Rocker Arm
• Part Number: 20R-6263
• Designed for Caterpillar 3400 Series engines
• Restores proper valve train operation
• Remanufactured to Caterpillar OEM specifications
• Includes applicable engineering updates
• Thoroughly cleaned, inspected, and performance tested
• Provides like-new performance and reliability
• Direct OEM replacement for eligible Caterpillar applications
• Supported by the Caterpillar Limited Warranty for Cat Reman products.

Technical Specifications

Note: Caterpillar has not published dimensional specifications, material composition, weight, or operating clearances for the CAT 20R-6263 Valve Rocker Arm.

Application Information

The CAT 20R-6263 Valve Rocker Arm is a critical component of the engine valve train. It transfers motion from the camshaft, through the pushrod, to the intake and exhaust valves, ensuring precise valve timing for efficient combustion, engine performance, and emissions control. Proper rocker arm operation is essential for maintaining engine power, fuel efficiency, and long service life.

The Cat Reman process includes comprehensive inspection of high-wear areas, restoration using advanced manufacturing techniques, incorporation of engineering improvements where applicable, and testing against original Caterpillar specifications. This ensures dependable performance while reducing repair costs and environmental impact compared to manufacturing a completely new component.

Compatible Caterpillar Equipment

The CAT 20R-6263 Valve Rocker Arm is compatible with a wide range of Caterpillar equipment powered by 3400 Series engines, including:

Truck Engines

• 3406
• 3406B
• 3406C
• 3408
• 3408B

Marine Engines

• 3406
• 3406B
• 3406C
• 3408
• 3408B
• 3408C
• 3412
• 3412C
• 3412D
• 3412E
• C30
• C32

Generator Sets

• 3406C
• 3408C
• 3412
• 3412C

Generator

• SR4
• SR500
• WEG SR4

Gen Set Engines

• 3406
• 3406B
• 3406C
• 3408
• 3408B
• 3408C
• 3412
• 3412C

Track-Type Tractors

• D7G
• D8L
• D8N
• D8R
• D8R II
• D9L
• D9N
• D9R
• D10N
• D10R

Pipelayers

• 578
• 583R
• 587R
• 589

Excavators

• 245
• 245B
• 245D
• 375-A
• 375-A L

Front Shovel

• 5080

Mining Excavator

• 5110B

Track Loader

• 983B

Wheel Loaders

• 980C
• 980F
• 980F II
• 980G
• 980G II
• 988B
• 988F
• 988F II
• 990
• 990 II
• 992C
• 992D

Wheel Dozers

• 814B
• 824C
• 824G
• 824G II
• 834B
• 844

Landfill Compactors

• 826C
• 826G
• 826G II
• 836

Soil Compactors

• 825C
• 825G

Cold Planers

• PM-465
• PM-565
• PM-565B
• PR-450
• PR-450C
• PR-750B
• PR-1000
• PR-1000C

Road Reclaimers

• RR-250
• RR-250B
• RM-350B

Reclaimer Mixers

• RM-250C
• RM-350
• RM-350B

Soil Stabilizers

• SS-250
• SS-250B

Wheel Tractors

• 621
• 621B
• 621E
• 621F
• 623B
• 623E
• 623F
• 627B
• 627E
• 627F
• 631D
• 631E
• 631G
• 633D
• 633E II
• 637D
• 637E
• 637G
• 639D
• 651E
• 657E

Power Module

• PM3412

OEM Solutions

• 3412C

Petroleum Engine

• 3412E

Engine – Machine

• 3408

Underground Articulated Truck

• AD40

Pumpers

• HT400
• SCT673
• SPS342
• SPT342

Winches

• 57H
• 58
• 58L
• 59
• 59L
• 59N

Motor Graders

• 16G
• 16H
• 24H

Compatibility should always be verified using the machine’s Product Identification Number (PIN), Engine Serial Number, Arrangement Number, or the existing part number before ordering.

Additional Compatibility Information

The 20R-6263 Valve Rocker Arm is a configuration-specific Cat Reman engine component. Before installation, verify:

• Engine model
• Engine serial number
• Product Identification Number (PIN)
• Engine arrangement number
• Existing rocker arm part number
• Valve train configuration

Any modifications to the original engine configuration may affect compatibility. Verification through Caterpillar Parts information or an authorized Cat dealer is recommended before installation.

Benefits

Installing a genuine CAT 20R-6263 Cat® Reman Valve Rocker Arm helps:

• Restore original valve train performance
• Maintain accurate valve timing
• Improve combustion efficiency
• Reduce engine downtime
• Lower repair costs compared to new components
• Maintain OEM fit and performance
• Benefit from Caterpillar engineering updates
• Deliver reliable, long-lasting performance backed by Caterpillar’s Cat Reman quality standards.