Annual Generator Maintenance
We provide you with a dependable annual maintenance contract for generators, covering all the maintenance services your business needs. GCM offers the annual generator maintenance your business needs to sustain, reliable performance all year long.
- Out of Hours Support
- Local Service
- Certified Engineers
- Fast & Trusted
Annual Generator Maintenance
For businesses that depend on uninterrupted power, finding a reliable annual generator maintenance provider to check their generator health is essential. In sectors where power is critical, such as healthcare, data centers, and manufacturing, even a small outage can cause a lot of damage.
As a trusted local provider, Generator Control & Maintenance Ltd offers contract clients fast response times, priority scheduling, and a well thought understanding of regional power demands making us the ideal partner for annual generator maintenance.
Our standard contract programme includes a service visit every six months, alternating between minor and major problems. Frequency can be changed depending on your specific operational needs.
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Annual Maintenance Contract For generator Units
How Often Does My Business Need It ?
Service frequency depends primarily on how your generator is used. Standby generators which are the most common application and are used as emergency backup power, we recommend a service visit every six months as standard. Each visit alternates between a minor and major service, ensuring dedicated support is maintained consistently throughout the year.
For prime power generators, which run continuously or for extended hours, servicing is typically based on running hours rather than a fixed time period, commonly every 250 hours or in line with the manufacturer’s recommendations.
Intervals can be flexible for time-based situations, where a site has experienced a period of power loss, a standby generator may accumulate several hundred additional running hours between services without issue. For long-term prime power agreements, service visits may be scheduled more frequently, in some cases every six weeks, with contracts typically arranged over a one to two year period to cover the ongoing demand for parts, labour, and site support.
In all cases, our team will assess your specific setup and recommend a servicing schedule that best suits your generator type, usage pattern, and operational requirements.
Different Types Of Generators
Not all generators are built the same, and understanding the different types is the first step in ensuring the annual maintenance contract for generator you need. Whether your business relies on emergency backup power or continuous on-site generation, each generator type comes with its own servicing requirements and maintenance schedule.
Standby Generators
Standby generators are permanently installed on site, remaining inactive until a power outage occurs, automatically activating to keep your business running without interruption.
Our maintenance programmes for standby generators are designed to ensure your unit activates instantly and performs reliably when it matters most. Through regular scheduled servicing, thorough system checks, and priority emergency support, we keep your standby generator in a constant state of readiness,so your operations continue without interruption.
Prime Power Generators
Prime power generators serve as the main source of electricity for sites with no reliable grid connection. Due to their continuous and intensive use, servicing is based on running hours rather than a fixed time period.
We offer hour-based maintenance programmes tailored specifically to the intensive demands of prime power generators, ensuring your unit is serviced at the right intervals in line with its running hours and manufacturer guidelines.
Portable Generators
Portable generators provide temporary power solutions for construction sites, events, and short-term applications compact and easy to transport, but still requiring regular maintenance to perform reliably when needed.
Our team services for portable generators to the same standard as larger installations, ensuring yours is always ready to perform when you need it most.
What Does A Diesel Generator Maintenance Contract Cover?
A diesel generator maintenance contract with Generator Control & Maintenance Ltd follows a clear process designed to keep your generators in peak condition and your business protected against unexpected failures. Here is what you can expect from our standard service procedure:
Step 1-Initial Site Assessment
Before any work begins, our engineers carry out a well thought assessment of your generator, reviewing its condition, usage history, and any existing concerns. This allows us to build a maintenance plan that is aligned with your specific setup and operational requirements.
Step 2-Scheduled Service visits
Under your diesel generator maintenance contract, service visits are conducted every six months, alternating between a minor and major service. Each visit is logged and documented, giving you a full service history and complete transparency over the condition of your equipment.
Notice
From the initial assessment through to fault resolution, our diesel generator maintenance contract is designed to give your business the peace it deserves with experienced engineers, reliable parts sourcing, and a transparent process from start to finish.
Get in touch today to discuss your requirements and receive a personalised quote for your generator maintenance contract.
Step 3-Minor Service
Our minor service is completed within a single visit, usually taking just a few hours. It covers routine checks including inspection of fuel injection pump, checking of oil levels, battery condition, cooling systems, and general operational testing to ensure everything is functioning as expected, with minimal disruption to your daily operations.
Step 4-Major Service
The major service goes further, involving a full system diagnostic, mechanical inspection, component assessment, and any necessary adjustments to bring your generator back to manufacturer specification.
Step 5-Fault Identification and Repairs
If a problem is identified during a service visit, our engineers will carry out the repair on the same day if it’s possible. We work with a network of trusted suppliers, meaning most standard parts can be sourced and delivered within a couple of days. Where an immediate fix is not possible, we will schedule a follow-up visit promptly and keep you informed every step of the way..
From the initial assessment through to fault resolution, our diesel generator maintenance contract is designed to give your business the peace it deserves with experienced engineers, reliable parts sourcing, and a transparent process from start to finish. After we finish our work, we provide you with a full report of the work we have done.
- Carry out Cold Cranking Amps Test on each Battery.
- Carry Out Specific Gravity Tests on each Battery Cell.
- Where relevant, Top up Battery Cells with De-ionised Water.
- Inspect set for oil / water / fuel leaks.
- Check Oil Level (Top up if given permission).
- Check Coolant Level before measuring Glycol Content.
- Top up Coolant (Top up if given permission)
- Check operation of water heater/s
- Inspect water hoses / clips - repair minor leaks.
- Inspect radiator/core - check airflow through / mountings.
- Check turbocharger - leaks / mountings / Inspect exhaust emissions.
- Check all belt pulleys - condition / tension.
- Check water pumps / seals / leaks / bearings.
- Check engine mountings / AVM's/fixings / Safety fan guards.
- Re-instate Charger and Confirm Voltage correctly rises
- Check fuel tank / fuel lines to the engine.
- Check the Charge alternator.
- Check battery leads condition / greased.
- Examine fuses, timers, relays & bases for visible faults.
- Examine switches, circuit breakers.
- Check the radiator fan.
- Inspect fuel injection pump / drive / mountings.
- Examine injector pipes / spill pipes / fuel lines.
- Check governor - engine speed / frequency.
- Check air manifolds / joints /air filters or clean oil bath filters.
- Check exhaust system / silencer / flexible joints / gaskets / lagging.
- Check ventilation of the generator room / canopy / enclosure.
- Check panel instrumentation warning lamps / gauges.
- Examine panel wirings, terminal blocks & connections.
- Inspect rotor / armature,
- Check A.V.R. / diodes & surge suppressor.
- Examine alternator wiring.
- Examine engine / alternator coupling / bolts.
- Inspect & report on generator room / canopy / enclosure.
- Carry out Coolant Sample Analysis.
- Complete Checks as Per Minor Service Scope of Works.
- Carry out Oil Sample Analysis.
- Carry out Fuel Sample Analysis from Day Tank
- Carry out Cold Cranking Amps Test on each Battery.
- Carry Out Specific Gravity Tests on each Battery Cell.
- Where relevant, Top up Battery Cells with De-ionised Water.
- Inspect set for oil / water / fuel leaks.
- Check Oil Level (Top up if given permission).
- Check Coolant Level before measuring Glycol Content.
- Top up Coolant (Top up if given permission)
- Check operation of water heater/s
- Inspect water hoses / clips - repair minor leaks.
- Inspect radiator/core - check airflow through / mountings.
- Check turbocharger - leaks / mountings / Inspect exhaust emissions.
- Check all belt pulleys - condition / tension.
- Check water pumps / seals / leaks / bearings.
- Check engine mountings / AVM's/fixings / Safety fan guards.
- Re-instate Charger and Confirm Voltage correctly rises
- Check fuel tank / fuel lines to the engine.
- Check the Charge alternator.
- Check battery leads condition / greased.
- Examine fuses, timers, relays & bases for visible faults.
- Examine switches, circuit breakers.
- Check the radiator fan.
- Inspect fuel injection pump / drive / mountings.
- Examine injector pipes / spill pipes / fuel lines.
- Check governor - engine speed / frequency.
- Check air manifolds / joints /air filters or clean oil bath filters.
- Check exhaust system / silencer / flexible joints / gaskets / lagging.
- Check ventilation of the generator room / canopy / enclosure.
- Check panel instrumentation warning lamps / gauges.
- Examine panel wirings, terminal blocks & connections.
- Inspect rotor / armature,
- Check A.V.R. / diodes & surge suppressor.
- Examine alternator wiring.
- Examine engine / alternator coupling / bolts.
- Inspect & report on generator room / canopy / enclosure.
- Carry out Coolant Sample Analysis.
- Complete Checks as Per Minor Service Scope of Works.
- Carry out Oil Sample Analysis.
- Carry out Fuel Sample Analysis from Day Tank
A Greener Approach To Annual Generator Maintenance
At Generator Control & Maintenance Ltd, we do things differently for some good reasons. Unlike what people usually do around, who carry out oil and filter changes as a standard annual procedure, we base all fluid and filter replacements on actual sample results and component condition assessments carried out during each service visit.
This means nothing is replaced unless it genuinely needs to be. It is a more precise approach that not only ensures your generator receives exactly the care it requires, but also reduces unnecessary waste, keeping our environmental footprint as small as possible.
The result is a maintenance programme that is better for your equipment, better for your budget, and better for the environment.
Why We Work With Pramac Generators?
At Generator Control & Maintenance Ltd, we work with Pramac, one of the most trusted names in power generation. Pramac is a leading manufacturer of stationary and mobile generators for commercial and industrial applications with a reputation for reliability and build quality that we are proud to stand behind.
Recognised for their durable construction, stable voltage output, and low-emission operation. Our team has hands-on experience servicing and repairing Pramac generators, offering a reliable and efficient service dedicated to the specific demands of your equipment.
Whether you require routine maintenance or a dedicated repair, we are here to help.
Annual Generator Maintenance UK
Generator Control & Maintenance Ltd provides annual generator maintenance services across the entire UK, delivering consistent service standards and rapid response times wherever your business is located.
Our coverage spans businesses of all sizes, from compact commercial setups to heavy-duty industrial operations, with dedicated annual generator maintenance contracts designed to keep your equipment running in their optimal form all year. Every visit is carried out to the same high standard, regardless of location.
Our standard working hours are Monday to Friday, 9am to 5pm, covering all scheduled maintenance visits and service appointments. We understand that generator issues do not always arise at this timetable, which is why we also provide out of hours contact for urgent situations, where we will do our best to assist you as fast as possible.
North East England
Yorkshire And The Humber
North West England
South East England
Greater London
North-East Scotland
Call Us For Annual Generator Maintenance
Contact our team today to discuss your ideal annual generator maintenance plan. If you’re also looking for sales, service, or support, we’re here to help. Get in touch now for expert advice and customised solutions!