JONAS KETSMECHANICAL MAINTENANCE

HEAVY EQUIPMENT MAINTENANCE

Jonas Kets.

Technical Specialist
in mechanical maintenance.

Jonas Kets smiles at the camera, wearing a blue Komatsu Ultra Program polo shirt against a light-blue background.
JONAS KETS ANANIAS COUTOTechnical Specialist

Field and workshop experience, with a career at Vale, Sotreq and Komatsu.

Open to opportunities in Canada

Relocation · Remote mine sites · FIFO rotations
My experience

Minas Gerais, Brazil

PROFESSIONAL EXPERIENCEVALESOTREQKOMATSUExplore the portfolio
A worker in a hard hat and blue uniform uses a long-handled tool at the center of an exposed circular metal engine assembly.MAINTENANCE / WORKSHOP

01 ABOUT JONAS

Technical knowledge.
Field experience.

More than nine years of reported experience in mechanical maintenance of heavy equipment, with a career at Vale, Sotreq and Komatsu.

From hydraulic component maintenance to mining fleet inspections, my work combines workshop experience, field interventions and failure analysis.

I hold a technical qualification in Mechanics from SENAI. Manufacturer training and hands-on work with large equipment support my ongoing professional development.

01Technical judgment

Diagnostics supported by inspections and equipment information.

02Workplace safety

Attention to procedures and working conditions.

Languages

English — A2+ · Developing.

Explore my specialties

02PROFESSIONAL EXPERIENCE

Experience built through practice.

A maintenance career progressing from component workshop work to inspections and a technical specialist role.

  1. February 2024 — presentCURRENT

    Komatsu

    Promoted to Technical Specialist in February 2024

    Technical Specialist

    Fault analysis, cause investigations and technical maintenance reporting for mining equipment.

    • Failure analysis
    • Technical reports
    • Mining equipment
  2. March 2021 — January 2024

    Komatsu

    Mechanic I

    Mechanical maintenance of mining equipment, with inspection duties since 2022. Work on L1850 loaders and D375 dozers, including mechanical and hydraulic systems and structures.

    • Inspections since 2022
    • L1850
    • D375
  3. January 2019 — March 2021

    Sotreq

    Mining Mechanic I

    Preventive and corrective maintenance of Caterpillar mining equipment, with work on haul trucks, dozers and drilling equipment.

    • Caterpillar 793D/F
    • D10
    • Field maintenance
  4. January — December 2018

    Vale

    Mechanic I

    Hydraulic component maintenance in the GADAS division, involving pumps, cylinders and valves, disassembly and bench testing.

    • Hydraulic components
    • Overhauls
    • Bench testing

03SPECIALTIES & EQUIPMENT

Know the system. Understand the equipment.

Experience with mining fleet systems and components across different stages of maintenance.

01

Diagnostics and failure analysis

Investigating symptoms, performing inspections and taking measurements to support equipment troubleshooting.

  • Komatsu WD600-3
  • Komatsu D61EX
  • Komatsu D375A-6R
02

Hydraulic and mechanical systems

Maintenance of pumps, cylinders, valves and mechanical assemblies in heavy equipment.

  • Pumps and cylinders
  • Valves
  • Track tensioners
03

Engines and powertrain

Component assembly, tightening to specified torque and work on transmission assemblies.

  • Komatsu SAA6D107E-1
  • Komatsu D61EX
  • Transmission systems
04

Mining equipment inspections

Preventive, predictive and structural inspections of large equipment fleets, in the field and workshop.

  • LeTourneau L1850 / L1350
  • Komatsu D375A-6R / D375A-5 / D475 / PC5500-6
  • Caterpillar 793D / 793F / D10 / MD6420

Equipment and systems documented in the resume and professional records. Brand names identify work experience.

04WORK HIGHLIGHTS

Technical skills in practice.

Records of work on heavy equipment. Each experience illustrates part of the field maintenance process.

A worker wearing a hard hat and blue uniform works in a side compartment of yellow equipment; another hard hat is visible in the foreground.01 / FIELD

Diagnostics

Transmission diagnostics — Komatsu WD600-3

Investigation of a transmission fault on a Komatsu WD600-3 wheel dozer, including measurement of the Lock-Up system solenoid’s electrical resistance. The measurement formed part of the diagnostic process to identify the cause of the fault.

A worker in a hard hat and blue uniform examines the area below a crawler dozer cab on rocky ground.02 / FIELD

Diagnostics

Cab mount inspection — Komatsu D61EX

Field inspection of a Komatsu D61EX crawler dozer following a report of excessive cab vibration. With guards and access covers removed, the cab mounting isolators were checked and a damaged component was identified.

A worker in a hard hat and blue uniform works beside a circular side assembly on a crawler dozer, with a black tray underneath.03 / FIELD

Diagnostics

Final drive oil sampling — Komatsu D375A-6R

Oil sampling from the final drive of a Komatsu D375A-6R dozer for condition analysis. The procedure supported an investigation into possible internal oil transfer associated with an abnormal noise in the assembly.

05PROFESSIONAL GALLERY

A closer look at the work.

From inspection to component assembly: real photographs of day-to-day maintenance.

6 records

Diagnostics

Transmission diagnostics — Komatsu WD600-3

Diagnostics

Cab mount inspection — Komatsu D61EX

Engines

Damper installation — Komatsu SAA6D107E-1 engine

Inspection

Blade inspection — Komatsu D375A-5

Diagnostics

Final drive oil sampling — Komatsu D375A-6R

Engines

Output shaft torque — Komatsu engine

PROFESSIONAL VIDEOS

Maintenance in action.

Real inspection and maintenance footage. Playback starts only when you use the controls.

Preventive maintenance

Cab inspection — Komatsu D61EX

Preventive inspection of the Komatsu D61EX cab and access areas.

Mechanical systems

Exhaust system — Komatsu D375A-6R

Report on repairs to the D375A-6R exhaust system mounting brackets.

Mechanical systems

Sprocket segments — D375A-6R

Inspection and replacement of worn sprocket segments on the Komatsu D375A-6R.

Hydraulic systems

Hydraulics and cooling fan — D375A-6R

Field service: hydraulic leak and cooling-fan rotation failure on the D375A-6R.

Mechanical systems

Cab mounts — Komatsu D61EX

Report on inspection and replacement of Komatsu D61EX cab mounts.

EDUCATION & TRAINING

The foundation
of experience.

Mechanical education and heavy equipment training. Knowledge developed throughout a professional career.

CONTINUOUS DEVELOPMENT

2019

Technical education

Technical Diploma in Mechanics

SENAI · Itabira

Completed in February 2019

Secondary-level technical education in Mechanics completed at SENAI Itabira, CFP Pedro Martins Guerra.

Completed
2025

Technical training

Komatsu Ultra Program

Komatsu · CTK Belo Horizonte

Completed in May 2025

250 hours
2020

Vocational training

Mechanic Training School

Grupo Sotreq

November 2019 to February 2020

Completed
2017

Skills training

Mechanics

Way Up · Profissões e Idiomas

Completed in January 2017

192 class hours
Not completed

University studies

Mining Engineering

UEMG

Studies discontinued

Studies discontinued.
Degree not completed.

Discontinued

Technical knowledge. Continuous learning.

07 CONTACT

Let’s talk
about the next
challenge.

For career opportunities in heavy equipment maintenance, get in touch or explore my full experience in the resume.

Open to opportunities in Canada
Relocation · Remote mine sites · FIFO rotations
Minas Gerais, Brazil
01EMAILjonaskets@gmail.com02LINKEDINConnect with Jonas