131-3737 RH Tie Rod Socket Assembly for Cat Motor Graders

The 131-3737 tie rod socket assembly is an aftermarket replacement component for selected Cat motor grader steering systems. Caterpillar identifies reference part number 131-3737 as a right-hand tie rod socket assembly.

Installed between the steering tie rod and steering arm, the socket assembly allows controlled angular variation between the connected components. This articulation supports steering movement and maneuverability while the component is exposed to repeated direction changes, torque, vibration and impact loads.

The published Caterpillar reference specification identifies carbon-steel construction, an overall length of 168.9 mm, a 7/8-14 nut-end thread and a 1-1/8-12 right-hand rod-end thread.

Some aftermarket catalogs describe 131-3737 as an “RH thread, LH side” part. Because left/right terminology may refer either to thread direction or installation position, buyers should identify the part primarily by the original part number, thread direction and machine serial number. The corresponding opposite-direction socket should not be selected by visual appearance alone.

This product is supplied as an aftermarket replacement. Caterpillar, Cat, machine model designations and part numbers are used solely for product identification and compatibility reference.

Key Features

• Aftermarket replacement for reference part number 131-3737

• Right-hand tie rod socket assembly

• 1-1/8-12 RH external rod-end thread

• 7/8-14 nut-end thread

• Published overall length of 168.9 mm

• Carbon-steel construction

• Designed for motor grader steering linkages

• Allows controlled angular movement between tie rod and steering arm

• Suitable for grader steering repair and fleet maintenance

• Thread and dimensional inspection available before shipment

• Bulk supply and customized export packaging available

Technical Specifications

Application and Compatible Models

The 131-3737 socket assembly is used in the steering systems of selected Cat motor graders.

Published Caterpillar compatibility includes:

• Cat 12G

• Cat 12H, 12H ES and 12H NA

• Cat 12K

• Cat 120 and 120 GC

• Cat 120G

• Cat 120H, 120H ES and 120H NA

• Cat 120K and 120K Series 2

• Cat 130G

• Cat 135H and 135H NA

• Cat 140 and 140 GC

• Cat 140G

• Cat 140H, 140H ES and 140H NA

• Cat 140K and 140K Series 2

• Cat 143H

• Cat 160

• Cat 160G

• Cat 160H, 160H ES and 160H NA

• Cat 160K

• Cat 163H and 163H NA

Compatibility varies by machine configuration and serial number. Check the applicable parts diagram before ordering.

Typical Working Applications

• Road construction

• Road maintenance

• Fine grading

• Site preparation

• Mining haul-road maintenance

• Municipal grading

• Steering-system overhaul

• High-hour motor grader maintenance