Service and maintenance

STK Ukraine LLC provides maintenance, diagnostics and repair of diesel generators and diesel power plants with a unit output from 10 to 3000 kVA.

A diesel generator is used for backup or standalone power supply of enterprises, commercial facilities, production sites, warehouses, infrastructure objects and other consumers. Its technical condition determines the stability of the equipment and the site’s readiness for an outage of the external power grid.

Regular maintenance of a diesel generator makes it possible to detect faults in time, monitor the condition of the main units and keep the power plant operational.

STK Ukraine LLC provides complete service for diesel generators of various brands, including Caterpillar, Cummins, JCB, SDMO, Dalgakiran, FG Wilson, AKSA, Atlas Copco, Matari, Ferbo, FULL, TMG, John Deere and others.

What diesel generator servicing includes

Servicing a diesel generator set is not only about changing oil and filters. When required, the service includes checking the engine, alternator, fuel system, electrical part and automatics.

Depending on the equipment model, operating hours and the manufacturer’s schedule, we can perform the following work:

• diesel engine diagnostics
• alternator check
• fuel system diagnostics
• control system check
• ATS diagnostics
• inspection of electrical connections
• voltage and operating parameters check
• inspection of unit and assembly mounting
• equipment cleaning
• oil change
• filter replacement
• coolant replacement when required
• drive belt check
• inspection of the power plant’s main units

The list of operations depends on the specific generator model, the manufacturer’s requirements and the customer’s request.

Scheduled maintenance of a generator set

Scheduled maintenance is required regardless of how often the generator is used.

Even if the diesel power plant stays in standby most of the time, its engine, battery system, fuel system, automatics and other components must be checked regularly.

Servicing is performed taking into account the operating hours and the service interval set by the manufacturer.

Level 1 maintenance (TO-1) of a diesel generator

The first maintenance level covers basic scheduled operations and monitoring of the main systems.

During maintenance the operating parameters, the condition of consumables, mountings and the units accessible for inspection are checked.

Level 2 maintenance (TO-2) of a diesel generator

TO-2 includes an extended set of preventive and diagnostic activities.

Special attention is paid to the engine, electrical part, fuel system and automatic control system.

Diesel generator diagnostics

Diagnostics help to determine the current condition of the equipment and identify the cause of a fault when problems occur.

STK Ukraine specialists diagnose:

• The diesel engine. The engine’s operating parameters and the condition of its main systems are checked.
• The alternator. The generator’s electrical part and the parameters of the produced voltage are checked.
• The fuel system. The correct operation of the fuel supply system and its related components is checked.
• Automatics and ATS. The operation of the control system and automatic transfer switch is checked.

Diagnostic work may include insulation resistance measurement, voltage testing and other necessary checks.

Load testing of a diesel generator

A simple start-up is not enough to fully verify the generator’s readiness for operation.

For backup power plants it is important to make sure the equipment can not only start but also run stably when consumers are connected.

Therefore, servicing may include load testing of the diesel generator.

This procedure allows the power plant to be tested in conditions as close as possible to real operation and to detect deviations in time.

Diesel generator repair

STK Ukraine performs diesel generator repairs of various complexity, including urgent emergency repair as agreed by the parties.

The work can be performed directly at the site where the generator is installed. This reduces equipment downtime and avoids transporting a large power plant to a service centre.

Depending on the nature of the fault, repair may involve work on:

• the diesel engine
• the alternator
• the fuel system
• the electrical part
• the control system
• the automatics
• the ATS
• auxiliary units of the generator set

Before the repair, diagnostics are carried out to determine the cause of the fault and the required scope of work.

Urgent diesel generator repair

A backup generator can fail exactly when the equipment is needed to power the site.

That is why, in case of critical faults, it is important not to just temporarily address the symptoms but to identify the cause of the failure.

STK Ukraine carries out emergency repairs and restores the operability of diesel power plants directly at their place of operation.

Servicing generators of different brands

STK Ukraine LLC services diesel power plants of various manufacturers. Among the serviced equipment:

• Caterpillar
• Cummins
• JCB
• SDMO
• Dalgakiran
• FG Wilson
• AKSA
• Atlas Copco
• Matari
• Ferbo
• FULL
• TMG
• John Deere
• other diesel generator brands

This lets you turn to a single service company regardless of the brand of the power plant installed at your site.

Spare parts and consumables

Quality servicing of a generator set depends not only on the service engineer’s knowledge but also on the correct selection of consumables and spare parts.

Quality consumables and original components are used during the service work.

We also keep a stock of spare parts and components needed for service and repair work.

On-site diesel generator service

Servicing the generator directly at its installation site avoids extra costs and downtime associated with dismantling and transporting the equipment.

STK Ukraine performs repair and maintenance of power plants at the customer’s site across Ukraine. Service work is carried out, in particular, in:

• Kyiv
• Dnipro
• Odesa
• Kharkiv
• Lviv
• Rivne
• Khmelnytskyi
• Sumy
• Kryvyi Rih
• Horishni Plavni
• other cities of Ukraine

Why a diesel generator needs regular maintenance

A diesel power plant may stay unused for a long time, especially if it is installed as a backup power source. However, the absence of load does not mean there is no need for maintenance.

Regular service allows you to monitor the equipment’s condition and keep it ready to start. Timely maintenance is needed for:

• a reliable generator start
• reducing the risk of a sudden fault
• monitoring the engine’s condition
• maintaining the electrical part in working order
• checking the automatics and ATS
• timely replacement of consumables
• extending the service life of the equipment

For facilities where the operation of production, communications, retail, engineering systems or other equipment depends on an uninterrupted power supply, a working backup power source is especially important.

Diesel generator service for business

For a business, the generator is part of the power supply system, so its maintenance should be carried out systematically.

Instead of repairing only after a fault occurs, it is advisable to use a scheduled approach: track operating hours, follow the maintenance schedule, run diagnostics and identify worn components in advance.

STK Ukraine can provide complete service support for a diesel power plant — from diagnostics and scheduled maintenance to repair and restoration of the equipment.

What the customer gets with STK Ukraine

Diesel generator servicing includes a set of works aimed at keeping the equipment in good condition. Key advantages of our service:

• qualified service engineers
• experience with diesel generators of different brands
• modern diagnostic equipment
• specialised software
• quality consumables
• original spare parts
• an in-house stock of components
• the ability to repair on site
• generator servicing across Ukraine

Our specialists regularly undergo training and professional development, including at the equipment manufacturers’ factories.

Order diesel generator servicing or repair

If the diesel generator has not been serviced for a long time, runs unstably, does not reach its rated parameters, or a backup power plant needs to be prepared for operation, we recommend starting with diagnostics.

STK Ukraine provides servicing and repair of diesel generators from 10 to 3000 kVA.

To determine the required scope of work, simply give our specialists information about the generator: manufacturer, model, output, operating hours and a description of the problem. After that, the list of necessary diagnostic and service measures can be defined.

Frequently asked questions

How often should a diesel generator be serviced?

The maintenance interval depends on the manufacturer, the power plant model, the number of operating hours and the operating conditions. You should follow the schedule of the specific equipment.

Does a generator need servicing if it is used rarely?

Yes. A backup generator must remain ready to start even while idle, so regular checks of its main systems are necessary.

Can you service a generator of another brand?

Yes. STK Ukraine services diesel generators of various manufacturers, including Caterpillar, Cummins, JCB, SDMO, Dalgakiran, FG Wilson, AKSA, Atlas Copco and others.

Is the generator repaired on site?

Yes. STK Ukraine performs repairs of various complexity directly at the power plant’s installation site.

What does generator diagnostics include?

Depending on the task, the diesel engine, alternator, fuel system, electrical part, automatics and ATS are checked. The necessary measurements of operating parameters are also taken.

Do you carry out emergency repairs?

Yes, our service list includes emergency and urgent repair of equipment.

Which generators does STK Ukraine service?

The company services diesel power plants from 10 to 3000 kVA of various manufacturers.

In which cities is the service provided?

Service work is carried out in Kyiv, Dnipro, Odesa, Kharkiv, Lviv, Rivne, Khmelnytskyi, Sumy, Kryvyi Rih, Horishni Plavni and other cities of Ukraine.