CAT 10R-2133 / 241-0372 Injector Rocker Arm

Product Overview

The CAT 10R-2133 Injector Rocker Arm is a Genuine Cat® Reman injector rocker arm assembly designed for Caterpillar C11 and C13 engines. The injector rocker arm transfers camshaft motion through the valve train to mechanically actuate the electronic unit injector, providing precise fuel injection timing for optimum combustion, engine performance, and emissions control. The remanufactured 10R-2133 is engineered and tested to Caterpillar’s original specifications, delivering like-new performance and reliability while reducing repair costs and environmental impact.

The CAT 241-0372 Injector Rocker Arm is the corresponding new Genuine Caterpillar OEM replacement for the remanufactured 10R-2133 assembly. Both parts are designed as direct replacements for compatible Caterpillar engines and equipment, ensuring OEM fit, function, and durability.

Key Features

• Genuine Caterpillar Injector Rocker Arm Assembly
• Part Numbers:
  • 10R-2133 – Cat® Reman Injector Rocker Arm
  • 241-0372 – Genuine Caterpillar OEM Injector Rocker Arm
• Designed for Caterpillar C11 and C13 engine platforms
• Transfers camshaft motion to the electronic unit injector
• Maintains precise fuel injection timing
• Manufactured to Caterpillar OEM specifications
• Direct OEM replacement
• Cat Reman version provides like-new performance at a reduced ownership cost
• Backed by Caterpillar’s applicable parts warranty for new and Cat Reman products.

Technical Specifications

Note: Caterpillar has not published additional specifications such as shaft diameter, material composition, weight, injector adjustment values, or operating clearances for the CAT 10R-2133 / 241-0372 Injector Rocker Arm.

Application Information

The CAT 10R-2133 / 241-0372 Injector Rocker Arm is a critical component of Caterpillar’s electronic unit injector fuel system. The rocker arm converts rotational motion from the camshaft into linear movement that actuates the unit injector, generating the high injection pressures required for efficient combustion. Accurate injector rocker arm operation is essential for proper fuel delivery, engine power, fuel economy, emissions compliance, and overall engine reliability.

Manufactured to Caterpillar’s stringent quality standards, the injector rocker arm is designed to withstand:

• Continuous camshaft loading
• High injector actuation forces
• Heavy-duty engine operation
• Continuous lubrication exposure
• Severe construction, mining, industrial, and petroleum service environments

Compatible Caterpillar Equipment

The CAT 10R-2133 / 241-0372 Injector Rocker Arm is compatible with the following Caterpillar equipment:

Truck Engines

• C11
• C13

Industrial Engines

• C11
• C13

Petroleum Engines

• C11
• C13

Combat Vehicle Engines

• C13

Generator Sets

• C13
• C13 GENSET
• D350GC
• D400GC

Excavators

• 345C
• 345C L
• 345C MH
• 345D
• 345D L
• 345D L VG
• 349
• 349D
• 349D L
• 349D2
• 349D2 L

Mobile Hydraulic Power Units

• 345C
• 345C L
• 345D
• 349D L
• 349D2

Wheeled Excavators

• W345C MH

Shovel Loggers

• 345C

Wheel Loaders

• 966H
• 972H
• 980C
• 980F
• 980L
• 980M
• 982M

Motor Graders

• 14
• 14M
• 14M-3
• 16
• 16M
• 16M3
• 18
• 18M3

Articulated Trucks

• 725
• 730
• 730C
• 730C2
• 735

Ejector Trucks

• 730
• 730C
• 730C2 EJ

Wheel Tractors

• 621H
• 621K OEM
• 623H
• 627H

Wheel Tractor-Scrapers

• 621K
• 623K LRC
• 627K LRC

Load Haul Dump

• R1600G
• R1600H
• R1700G

Underground Articulated Trucks

• AD22

Track-Type Tractors

• D8N

Rotary/Track Drills

• MD5125
• MD5150C

Reclaimer Mixers

• RM-300

Compatibility should always be verified using the machine’s:

• Product Identification Number (PIN)
• Engine Serial Number
• Arrangement Number
• Existing injector rocker arm part number

before ordering.

Additional Compatibility Information

The 10R-2133 / 241-0372 Injector Rocker Arm is a configuration-specific fuel system component. Before installation, verify:

• Engine model
• Engine serial number
• Product Identification Number (PIN)
• Engine arrangement number
• Existing injector rocker arm part number
• Injector and 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 10R-2133 / 241-0372 Injector Rocker Arm helps:

• Restore accurate injector actuation
• Maintain precise fuel injection timing
• Improve combustion efficiency
• Support engine power and fuel economy
• Reduce injector train wear
• Minimize downtime with a direct OEM replacement
• Preserve factory engine performance
• Deliver OEM-quality fit, durability, and long-lasting reliability in demanding heavy-duty applications.