Professional Engineering Solutions for Yellow Plant & Heavy Machinery
Nkokhi Group provides comprehensive Mechanical & Engineering Services for heavy machinery and yellow plant equipment throughout South Africa. Our experienced team specialises in mobile on-site repairs, component rebuilds, undercarriage engineering, and precision fabrication — all aimed at maximising uptime, improving performance, and reducing operational downtime for your fleet.
Whether you operate in mining, construction, earthmoving, logistics, agriculture, or plant hire, Nkokhi Group ensures your equipment remains reliable, efficient, and compliant with operational safety standards. Our engineering capabilities cover everything from advanced diagnostics and hydraulic repairs to major component overhauls and full machine refurbishments.
Our Mechanical & Engineering Services include:
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On-site mechanical repairs & mobile field service
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Complete component rebuilds (engines, transmissions, torque converters, axles, pumps)
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Undercarriage servicing, repairs & engineering
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Custom steel fabrication & welding solutions
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Electrical and hydraulic diagnostics & fault-finding
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Preventive and scheduled maintenance programs
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Full equipment refurbishments & machine overhauls
With a strong commitment to quality workmanship and fast turnaround times, Nkokhi Group delivers engineering solutions designed to support demanding industries and harsh operating environments.
From diagnostics and fabrication to rebuilds and on-site support – Nkokhi Group is the reliable mechanical engineering partner you can trust to keep your operations running at peak performance.
Our Mechanical & Engineering Capabilities
1. Engineering Consultancy & Project Support
We deliver end-to-end support for all project phases – from feasibility to implementation.
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Feasibility studies & technical assessments
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Detailed mechanical engineering and design
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Recommendations aligned to OEM specifications
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Project oversight for retrofits, rebuilds & upgrades
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Procurement coordination for critical components
Our engineering approach focuses on performance, safety, and long-term cost efficiency, helping you make the right decisions for your fleet.
2. Mechanical Maintenance & Repairs
Keep your machines running at peak performance with responsive and reliable support.
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On-site fault diagnostics & troubleshooting
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Preventive maintenance planning
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Component rebuilds (engines, transmissions, pumps, final drives)
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Breakdown repair and emergency response
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Wear component replacement & optimisation
We combine skilled technicians with a strong supply network to reduce downtime and extend equipment lifespan.
3. Undercarriage Engineering & Overhauls
Specialising in tracked machinery, Nkokhi Group delivers precise undercarriage services that improve durability and reduce operating costs.
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Full undercarriage inspections & wear analysis
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Track systems engineering (rollers, idlers, sprockets, chains)
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Replacement & installation using high-quality parts
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Alignment, tensioning & load-distribution optimisation
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Rebuilds for worn or damaged assemblies
Our solutions maximise traction, stability, and working efficiency on any terrain.
4. Ground Engaging Tools (GET) Engineering
Boost your machine’s productivity with carefully engineered GET solutions.
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Supply & installation of bucket teeth, adapters, shrouds, cutting edges
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Hard-wearing GET configurations for mining & construction
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Application-based recommendations (abrasive, rocky, sandy environments)
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GET performance assessments and wear forecasting
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Field support for installation & torque settings
Engineered for strength, penetration, and cost-effective wear life.
5. Fabrication, Welding & Machining
Our fabrication and machining capability allows us to engineer tailor-made and repair-based solutions.
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Heavy-duty steel fabrication
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On-site welding for structural repairs
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Line boring & precision machining
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Custom brackets, frames, mounts & retrofits
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Repair of housings, shafts, pins & bushings
All work is performed according to strict quality standards to ensure reliability in demanding environments.
6. Alignment, Balancing & Machine Health Monitoring
Prevent failures before they occur.
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Laser & mechanical shaft alignment
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Dynamic balancing of rotating components
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Vibration testing & diagnosis
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Thermal and mechanical condition monitoring
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Oil analysis & predictive maintenance support
This proactive approach reduces breakdowns, increases machine uptime, and lowers lifecycle costs.
7. Technical Support & Training
Equip your team with the right skills and knowledge.
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Operator & maintenance training
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Component identification guidance
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Installation support for major parts
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Technical documentation & service schedules
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Expert advice on OEM, aftermarket & reconditioned solutions
We become an extension of your engineering team.
8. Logistics & Supply Chain Engineering
Integrated engineering with parts sourcing and supply efficiency.
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Import & sourcing of hard-to-find components
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Inventory planning for parts-heavy fleets
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End-to-end logistics support across Southern Africa
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Lifecycle costing & budgeting support
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Technical validation of sourced parts
Because the right part, at the right time, keeps your project moving.
Why Choose Nkokhi Group for Engineering Services?
✔ Deep industry experience
Supporting mining, construction, earthmoving, civil works, and plant hire.
✔ Full engineering + supply capability
From diagnostics to fabrication — paired with strong parts availability.
✔ Faster turnaround times
We prioritise uptime and deploy skilled teams quickly.
✔ Quality you can trust
All rebuilds, repairs, and fabrications meet industry-best standards.
✔ Customer-focused service
Every solution is tailored to your site conditions, machine types, and budget.
Nkokhi Group is committed to delivering reliable, cost-efficient engineering that keeps your operations productive.
Industries We Serve
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Mining & quarrying
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Civil construction & infrastructure
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Plant hire & contracting
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Earthmoving & bulk earthworks
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Roadworks, agriculture & industrial sectors
Request Engineering Assistance
Whether you need a full rebuild, urgent repair, or engineering consultation, our team is ready to assist.
FAQ
What types of machinery do you service?
We service a wide range of yellow plant and heavy machinery, including: Excavators Dozers Loaders Motor graders Compactors Trucks & construction equipment We work on Caterpillar, Komatsu, Hitachi, Volvo, SEM, Bell, John Deere, and other major brands.
Do you offer on-site mechanical repairs?
Yes. We provide mobile/on-site diagnostics and repairs across South Africa. Our technicians can travel to your construction, mining, or plant-hire site to carry out inspections, fault finding, and repairs.
Can you rebuild engines, transmissions, and pumps?
Absolutely. We specialise in rebuilds and overhauls for: Engines Transmissions Final drives Hydraulic pumps & cylinders All rebuilds follow strict quality standards and use OEM-equivalent parts.
Do you supply the parts needed for repairs?
Yes. We have a strong parts supply network and can source OEM, aftermarket, refurbished, or used components depending on your budget and machine needs.
What engineering services do you offer besides repairs?
Our services include: Mechanical engineering & design Undercarriage engineering Ground engaging tool (GET) engineering Fabrication, welding & machining Shaft alignment & dynamic balancing Condition monitoring & vibration analysis Project management & technical support
How quickly can you respond to a breakdown?
Response times depend on location, but we prioritise urgent mechanical issues. In most cases, we deploy technicians within the same day or next business day.
Do you offer maintenance plans for fleets?
Yes. We create custom preventive maintenance schedules for plant-hire fleets, construction companies, and mining operations to reduce downtime and minimise repair costs.
What undercarriage services do you provide?
We handle everything from inspections and wear analysis to complete undercarriage rebuilds, including: Track chains Rollers Idlers Sprockets Alignment & tensioning Load distribution optimisation
Can you fabricate custom components?
Yes. We offer custom fabrication and machining, including brackets, frames, steel structures, pin/bush repairs, line boring, bucket repairs, and more.
Do you offer engineering support for mining operations?
Yes. We support mining clients with: Machine health assessments Equipment optimisation Rebuilds & GET upgrades Logistics & sourcing support On-site engineering assistance
Do you provide condition monitoring?
Yes. We offer vibration analysis, oil analysis, temperature monitoring, and early-failure detection to help prevent breakdowns and control maintenance costs.
Can you assist with parts identification?
Definitely. You can send us the part number, serial number, or even photos, and our team will identify the correct component for your machine.
What areas do you service?
We service clients across Gauteng, Mpumalanga, Limpopo, North West, KZN, Western Cape, and cross-border regions in Southern Africa.
Do you offer warranties on your work?
Yes. All engineering work, rebuilds, and fabricated components come with a workmanship warranty. Warranty terms depend on the type of repair or part supplied.
Expert Tips for Mechanical & Engineering Services
1. Schedule Regular Equipment Inspections
Routine inspections help identify early signs of wear, leaks, overheating, vibration, and alignment issues—preventing costly breakdowns and downtime.
2. Keep Maintenance Logs Updated
Documenting all repairs, services, and parts replacements improves reliability and helps technicians diagnose future issues faster.
3. Use Quality, OEM-Approved Components
Cheap parts cause premature failures. Investing in high-quality components increases machine lifespan and performance.
4. Don’t Delay Minor Repairs
Small issues like noise, vibration, or slow response often indicate early mechanical failure. Fixing them early saves thousands in repair costs.
5. Ensure Proper Lubrication
Incorrect lubrication causes up to 60% of mechanical wear. Use the correct lubricants and follow manufacturer intervals.
6. Monitor Equipment Performance Data
Modern equipment provides real-time telemetry. Monitoring load, temperature, and cycle performance helps catch faults early.
7. Train Operators Regularly
Poor handling leads to avoidable wear and breakdowns. Skilled operators extend equipment life and ensure safety.
8. Follow OEM Service Schedules
Manufacturers design service intervals for optimal performance. Skipping intervals risks warranty voids and expensive breakdowns.
9. Keep Work Areas Clean and Safe
Dirt, dust, and debris accelerate equipment wear. A clean environment improves efficiency and reduces contamination damage.
10. Partner With Certified Mechanical & Engineering Experts
Working with qualified professionals ensures compliant installations, accurate fault-finding, and reliable system performance.