mos.directory

Navy NEC · Engineering

744B Caterpillar Diesel Technician

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

A Navy Enlisted Classification: a skill designation sailors hold in addition to their rating.

Browse Navy

Overview

A Caterpillar Diesel Technician operates and maintains Caterpillar model 3126 diesel engines in Naval Special Warfare Rigid Hull Inflatable Boats. This technician performs maintenance and troubleshooting according to the manufacturer's technical manual or performance checklist.

Core Skills

  • Caterpillar 3126 maintenance in rigid hull inflatable boats
  • Troubleshooting using manufacturer manuals and performance checklists

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Bus and Truck Mechanics and Diesel Engine Specialists

Maintaining and troubleshooting Caterpillar 3126 marine diesel engines using manufacturer procedures transfers directly to the diesel engine service portion of this occupation.

How to prepare: Arrange supervised practice diagnosing commercial diesel engines with test instruments, focusing on engine models beyond the Caterpillar 3126.

What the civilian work involves
  • Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists.
  • Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
Civilian tools and software (examples)
  • Computerized maintenance management system software CMMS

Notes & Sources

  • The verified duties cover marine diesel engines, not the brake, steering, or chassis work included in broader bus and truck mechanic jobs.
Evidence for this guidance (2 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC 744B

    [1] NEC entry "744B - Caterpillar Diesel Technician"; cached text line 17713; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Caterpillar 3126 maintenance in rigid hull inflatable boats, Troubleshooting using manufacturer manuals and performance checklists, Bus and Truck Mechanics and Diesel Engine Specialists (O*NET 49-3031.00)

  2. O*NET: Bus and Truck Mechanics and Diesel Engine Specialists

    [2] O*NET 30.3 occupational data

    Supports: Bus and Truck Mechanics and Diesel Engine Specialists (O*NET 49-3031.00)

Defense contractor jobs for 744B

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

Report an error on this page