Engine Rebuilds to Keep Your Cat® Fleet Working

Unplanned downtime increases cost per tonne and puts production targets at risk. A Cat® Certified Engine Rebuild, or a complete powertrain and component overhaul, restores like-new performance without the expense of new equipment.

WesTrac provides mining-grade rebuilds across Australia, with centres in Welshpool (WA) and Tomago (NSW), supported by a nationwide branch network and mobile field service teams.

CPT: Cat Certified Powertrain Rebuilds, Full Output, Minimal Downtime

Mining powertrains face extreme loads and harsh conditions every shift. A Certified Powertrain Rebuild restores:

• Engine and radiator performance
• Transmission and torque converter function
• Final drives and differentials
• Axle

Benefits for mining operations:

• Maintains payload and cycle-time efficiency
• Reduces cost per tonne vs buying new equipment
• Includes rigorous testing and flexible warranty options
• Engine Control Module (ECM) updates
• Diagnostics integration because control logic is critical to performance recovery

Combine with the CPT+H (Certified Powertrain + Hydraulics) package to renew both powertrain and hydraulic circuits in one planned shutdown, minimising downtime and protecting production KPIs.

Engine Rebuilds, Precision Built for Mining

A mining engine rebuild goes beyond an in-frame repair. WesTrac’s dealer-trained technicians:

• Disassemble and inspect all core components
• Machine or replace worn parts with genuine Cat® components
• Update ECUs and control software to the latest standards
• Bench, and field-test under real mining loads

Why it matters:

• Extends machine life
• Maintains performance in high-hour operations
• Controls capital expenditure for mining fleets

Hydraulic Rebuilds, Restore Power and Control

Hydraulic systems drive productivity across dig-face excavators, haul trucks, and underground gear. A Hydraulic Rebuild:

• Targets pumps, valves, cylinders, and circuits
• Recovers lifting power and fast cycle times
• Works with CPT+H rebuilds for fully synchronised performance

The WesTrac Difference

Contamination control is critical for hydraulic rebuilds because even microscopic particles, water, or air in the hydraulic fluid can cause premature wear, reduced efficiency, overheating, and catastrophic failure of sensitive hydraulic components like pumps and valves. This leads to increased downtime, higher repair costs, and a significantly shortened lifespan for the rebuilt system. 

WesTrac offers contamination control through their Cat S•O•S Fluid Analysis program, which detects contaminants like water, fuel, and dirt in engine, hydraulic, and drivetrain oils to prevent equipment damage. For physical contamination, WesTrac promotes clean practices like using clean tooling, dust-free sampling areas, and new, empty fluid bottles during fluid sampling. WesTrac also designs equipment with features like easily accessible, modular components to aid in contamination control and provides training on best practices for managing fluid contamination. 

Component Rebuilds, Targeted, Cost-Effective Solutions

Not every machine needs a full rebuild. WesTrac’s component rebuild centres, including Welshpool Machine Rebuild & Fabrication Centre, handle:

• Cylinder heads
• Turbochargers
• Torque converters
• Other high-wear components

Benefits:

• Keeps key assets in production longer
• Delays significant capital expenditure
• Maintains machine reliability on-site

Certified Machine Component Rebuild

The Caterpillar Certified Machine Component Rebuild (CMCR) is available for certain components. CMCR restores engine or transmission plus torque converter combination to like-new performance. WesTrac then assembles and tests to Cat cleanliness and performance specifications. It includes critical engineering updates and extended coverage is available.

WesTrac offers the following CMC rebuild options:

• CMCR-E Certified Machine Component Rebuild – Engine
• CMCR-T Certified Machine Component Rebuild – Transmission and Torque Converter
• CMCR-A-F Certified Machine Component Rebuild – Axle-Front
• CMCR-A-C Certified Machine Component Rebuild – Axle-Center
• CMCR-A-R Certified Machine Component Rebuild – Axle-Rear
• CMCR-D-F Certified Machine Component Rebuild – Differential-Front
• CMCR-D-C Certified Machine Component Rebuild – Differential-Center
• CMCR-D-R Certified Machine Component Rebuild – Differential-Rear
• CMCR-F Certified Machine Component Rebuild – Final Drive

Local Support for Australian Mines

• Welshpool, WA: Large-scale Machine Rebuild & Fabrication Centre for iron ore, gold, and other WA mining operations
• Tomago (WesTrac Newcastle), NSW: Rebuild hub supporting coal, hard-rock, and civil fleets across the Hunter Valley and NSW

Both centres integrate with WesTrac’s national branch network for logistics, parts supply, and on-site commissioning, essential for remote mine sites.

FAQs

Is a rebuild cheaper than buying new?
Yes. A certified rebuild costs a fraction of new equipment while restoring original performance and lowering cost per tonne.

How long will a rebuild take?
Turnaround depends on the scope and parts availability. WesTrac provides a project plan aligned with maintenance shutdowns to minimise production impact.

What warranty options are available?

• Cat Certified Rebuild: 12 months standard, Equipment Protection Plan (EPP) optional
• Cat Certified Powertrain Rebuild: Includes parts warranty on all replaced parts, with EPP optional. 12 to 60 months / 3,000 to 10,000 hours providing flexibility based on operational needs.
• Cat Certified Component Rebuild: Includes parts warranty on all replaced parts, with EPP optional. 12 to 60 months / 3,000 to 10,000 hours providing flexibility based on operational needs.

Can I combine a rebuild with other planned maintenance?

Yes

Keep Your Mine on Target

Protect production and reduce cost per tonne with a WesTrac Cat Certified Rebuild.

Request a mining-specific assessment or quote today at Welshpool, Tomago, or through our national branch network.

Talk to WesTrac’s rebuild specialists today to plan your Certified Engine or Powertrain Rebuild protect production and lower your total cost of ownership.

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