Terex repair and service

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Professional Terex machinery repair

Terex Construction Equipment Service

We offer comprehensive service support, field diagnostics, and major overhauls of components for Terex machinery. Our team of mechanics faultlessly pinpoints malfunctions in advanced Bosch Rexroth, Linde, or Danfoss hydraulic systems and restores factory specifications to Deutz, Perkins, and Cummins engines, ensuring your equipment returns to the job site as quickly as possible. At the WIBAKO service base in Kojszówka, we comprehensively handle every model from the Terex family. We are perfectly familiar with the technical specifics of mini-excavators such as the TC 16 or TC 22, heavily used TLB 840, TLB 890, and 860 backhoe loaders, as well as heavy wheeled excavators and loaders. Our greatest advantage is the combination of engineering expertise with a unique technological infrastructure. Rebuilt piston pumps, travel motors, and control valves are tested on a specialized hydraulic test bench, where they undergo extreme pressure testing. This eliminates the risk of any hidden defects, providing you with a component ready for the toughest challenges.

No more smoking and power loss

Internal Combustion Engine Experts

Is the engine in your Terex smoking, consuming oil, losing compression, or has it broken down completely? At WIBAKO, we don't limit ourselves to superficial repairs. Our dedicated team of engine mechanics specializes in major overhauls of power units installed in Terex machines. We restore factory efficiency to engines of brands such as Deutz, Perkins, Cummins, Yanmar, or Mitsubishi, taking care of every detail – from precise block machining to injection system calibration. Our workshop features full technical facilities to conduct rigorous repair procedures. Every unit that reaches us is completely disassembled and washed, and its key components undergo precise wear micro-measurements. We recondition cylinder heads, grind crankshafts, replace repair kits (pistons, rings, liners), and accurately set fuel system and timing parameters.

 

Power Guarantee for Your Terex

WIBAKO Engine Test Dynamometer

We possess an advanced stationary engine dynamometer with a capacity of up to 500 HP, where we test every remanufactured power unit. We don't guess – we precisely measure, calibrate, and verify the performance parameters of Deutz, Perkins, or Cummins engines, giving you the confidence that your equipment returns to the site 100% ready for the heaviest workloads. A major engine overhaul is a complex process, and its final and most crucial stage is the load test. Our dynamometer allows us to simulate the extreme operating conditions of a Terex machine for hours. After assembly, every engine is subjected to rigorous tests under full load.


We monitor all key parameters in real-time:
Rated power (HP/kW) and torque (Nm)
Oil and coolant pressure and temperature
Exhaust Gas Temperature (EGT) and smoke emissions
Fuel consumption and tightness of the entire system
Thanks to these tests, we detect even the smallest anomalies right in our workshop in Kojszówka, eliminating the risk of costly failures and repeated downtime on the construction site.

 

Risk-Free Warranty

12 Months of Assurance After Engine Overhaul

We take full responsibility for the quality of our work, which is why we provide a 12-month warranty on every power unit after a major rebuild. We protect your business against unexpected breakdowns, offering protection for engines such as Deutz, Perkins, Cummins, Yanmar, or Mitsubishi.

When is it Time for Service?

Symptoms of Engine Failure in Terex Machinery

Terex construction and material handling equipment operate under the toughest conditions, exposing their power units to immense loads. Ignoring the first symptoms of engine wear in a Terex excavator, loader, or dumper drastically reduces the machine's lifespan and leads to costly downtime.


Here are the key symptoms that indicate your Terex engine requires immediate diagnostics or repair:


Unusual exhaust smoke - thick, black smoke under load usually means a failure in the injection system or turbocharger. Blue-tinted smoke indicates engine oil combustion, while white smoke indicates coolant entering the combustion chamber.


Sudden power drop under load - a situation where the Terex machine visibly "chokes" while digging, RPMs drop drastically while operating the arm, and the equipment loses its factory dynamics.


Hard starting when cold and hot - difficulty starting in the morning after sitting or trouble restarting the engine after it has warmed up thoroughly during intense work.


Uneven operation and RPM surging - jerking, irregular idling rhythm, and any worrying metallic knocks, clicking, or rattling coming from the engine compartment.


High crankcase pressure (blow-by) - intense smoking or oil ejection through the breather or oil filler cap, which definitely proves leakage in the piston-cylinder system.


Coolant or oil loss - the need to constantly top up operating fluids despite the absence of visible external leaks on the engine housing.

 

Precise Remanufacturing for Terex Machinery

Power Hydraulics Team

At WIBAKO, we have established a dedicated, entirely independent team of mechanics who focus exclusively on advanced power hydraulics. These are experts who thoroughly know the specifics of piston pumps, hydraulic motors, and control valves from brands like Bosch Rexroth, Linde, or Danfoss operating in Terex machines. Every component that comes to us is completely disassembled, cleaned, and subjected to precise micro-measurements of wear on valve plates, pistons, and housings. Thanks to our massive in-house spare parts inventory, we can instantly replace damaged rotary elements, seals, or bearings, which reduces repair time to a minimum and drastically lowers costs compared to buying a new component.

 

Diagnostic Workstations

Professional Hydraulic Test Bench

Fast and accurate diagnosis is the foundation of effective power hydraulics repair. At WIBAKO, we possess professional diagnostic stations and an advanced hydraulic test bench, allowing us to accurately verify and test pumps, hydraulic motors, and other key components before and after remanufacturing.
Our technical facilities allow for precise measurement of operating parameters, such as pressure, efficiency, and internal tightness under full working load. This enables us to detect even the smallest deviations from manufacturer standards before the component is installed on the machine. Testing components on a stationary test bench gives you a guarantee of trouble-free operation, perfect system adjustment, and the complete elimination of the risk of costly re-works on the job site.

 

When to React?

Symptoms of Power Hydraulics Failure in Terex Machinery

The hydraulic system in Terex machines is responsible for their immense power and working precision. Intense operation in demanding conditions means that components like piston pumps, control valves, or travel motors lose their efficiency over time. Detecting a fault early prevents the entire system from becoming contaminated with metal filings.


Here are the most common symptoms indicating hydraulic issues in your Terex:


Drastic drop in performance after the oil heats up – the machine works correctly after starting, but as the hydraulic oil temperature rises, it visibly slows down, weakens, and loses the fluidity of its working movements.


Lack of breakout and lifting force – the Terex struggles to close the bucket with a full load or lift the arm under weight, accompanied by a characteristic "whining" from the relief valves trying to maintain the required pressure.


Problems with travel and steering – a Terex dumper or excavator pulls to one side while driving, struggles to climb slopes, or completely loses power on one of the hydraulic motors.


Slowing down or total paralysis of a single function – a situation where most systems work flawlessly, but one specific movement responds very slowly or jerkily, indicating damage to a specific section of the control valve or cylinder seals.


Noisy hydraulic pump operation – unsettling metallic sounds, knocking, or a characteristic rattling near the main pump, most often caused by its seizing or the phenomenon of cavitation.


Rapid system overheating – the hydraulic oil reaches critical temperatures in a very short time, leading to the destruction of seals throughout the machine and drastically reducing the lubricating properties of the oil.


Silver dust or filings in filters – the presence of metal particles in the hydraulic filter is the absolute last moment to react before a damaged pump completely contaminates and destroys the remaining system components.

Quick Help on Your Construction Site

Terex Mobile Service

Breakdowns during intense work require an immediate response, which is why our Terex mobile service is always ready to reach your machine directly. Instead of arranging expensive transport to the workshop, you receive support from specialists who know the construction of Terex excavators, loaders, and material handling machines inside out.
Our service vehicles are fully equipped diagnostic units. We possess advanced hydraulic testers, service software, and tools that allow for precise field diagnostics of powertrains, control systems, and power hydraulics. Our mechanics, specializing in the Terex brand, instantly locate the source of the downtime – from system leaks and valve failures to electronic glitches. Thanks to direct access to our spare parts warehouse, we carry out a significant portion of repairs on the spot, allowing you to return to work in the shortest possible time.

 

Everything You Need, Available Immediately

Terex Spare Parts Warehouse

In the construction industry, every hour of downtime generates massive losses, which is why response time is the key to an effective repair. At Wibako, we eliminate the most common issue faced by service providers-long waiting times for component deliveries. We have a massive, fully stocked warehouse with parts for Terex machines, meaning all necessary elements are available on hand. In practice, this means that when our mobile service team heads out to a field call, they take the required components with them right away. We carry out the repair on-site immediately, without waiting for couriers and without unnecessary downtime for your business.

What Terex machine parts do you have in stock?

Our permanent inventory includes, among others, hydraulic power components (pumps, valves), engine parts, undercarriage components, and drive systems – available as new, remanufactured, or used.

Does your mobile service travel across the whole of Poland?

Yes, our service technicians are fully mobile and travel directly to the construction site or the breakdown location anywhere in the country.

Do you provide a warranty on parts and repair services?

Yes. All repairs carried out by us, as well as components (both new and those remanufactured in our workshops), are covered by a full warranty.

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