What We Do
Generator Services Across Gauteng
Every generator service we offer, on site across Johannesburg, Pretoria, Midrand, Centurion and the rest of Gauteng: repairs, scheduled servicing, maintenance contracts and 24/7 emergency callouts, plus installation and controller work. Pick the service below, or call and we will tell you which one fits.
Onsite generator service across Gauteng · Written quote before work starts
Generator Repairs
On-site diagnosis and repair across Johannesburg, Pretoria, Midrand and the rest of Gauteng. The fault is tested and named first, and if a part has to be ordered you are told before it is.
- Cummins, Perkins, Caterpillar, Deutz, Volvo and other sets seen on site
- Portable petrol units and larger diesel standby sets
- The fault is named before parts are changed
- Workmanship warranted for 1 year, as set out in the terms
Generator Servicing
A service follows the manufacturer’s schedule for your engine: oil and filters, the cooling system, belts, the battery and charger, and a test run, with the items matched to the model and its hours. Servicing is done on site across Gauteng.
- Full oil and filter change with quality-spec lubricants
- Coolant system inspection and top-up
- Air and fuel filter replacement
- Battery and charging system check
Scheduled Maintenance
Scheduled maintenance keeps a generator that has to stay ready on a regular cycle of visits. The intervals follow the manufacturer’s schedule, running hours and how the set is used, and every visit is recorded. A single oil-and-filter visit is booked as servicing.
- Schedule set by hours, calendar or how the set is used
- Notes kept from each visit for that generator
- Plan clients scheduled ahead of new callouts
- Each visit quoted before it is booked
Emergency Callouts
When a generator fails during a power outage, call us any time, day or night. We cover Johannesburg, Pretoria, Midrand, Centurion and the rest of Gauteng, and we arrive within 1 hour.
- Open 24/7, including weekends and public holidays
- Residential, commercial and industrial breakdowns
- The fault is named before parts are changed
- On site within 1 hour across Gauteng
Load Bank Testing
A standby set that rarely carries load can leave unburned fuel in the exhaust. Load bank testing applies a controlled electrical load so output can be checked under load. The visit includes a note of the steps and the readings.
- Load applied in steps, as far as the set and the site allow
- A loaded run can show faults that a no-load start hides
- A record of the load steps and the readings
- Identifies capacity shortfalls before they become emergencies
AVR & Voltage Regulator Repairs
A faulty automatic voltage regulator can leave a generator with low, high or unstable voltage, which can damage connected equipment. The AVR is tested against engine speed and the alternator before it is replaced, and the output is checked again afterwards.
- Diagnosis of voltage fluctuation and instability faults
- AVR replacement with OEM-spec or quality aftermarket units
- Voltage output testing under varying load conditions
- Brushless alternators with an AVR, across many makes
Control Panel Repairs
Standby generators rely on a control panel and an AMF (automatic mains failure) controller to start automatically and transfer the load. When these fault, the generator may stay silent when the mains fails. Control-panel work covers the controller families listed on that page, not every controller ever fitted.
- AMF and ATS controller diagnosis and repair
- Deep Sea (DSE), SmartGen and the other families on the controller page
- Relay, fuse and circuit board replacement
- Full auto-start and shutdown cycle testing
Fuel System Repairs
Stored diesel can degrade and collect water, and blocked filters or worn injectors stop a set delivering power. Fuel system work covers contamination, filters, injectors, lift and injection pumps, and the tank itself.
- Fuel polishing and contamination removal
- Injector cleaning, testing and replacement
- Fuel lift pump and injection pump repairs
- Fuel tank inspection and internal cleaning
Generator Rewinding
When a generator alternator suffers winding failure — from insulation breakdown, overloading, or moisture ingress — rewinding is assessed against replacing the alternator. We test the windings at your premises, rewind stators and rotors, and test insulation resistance before the set goes back into service.
- Stator and rotor rewinding to OEM specifications
- Insulation resistance testing before and after rewind
- Assessed on the alternator that is fitted, including Stamford, Leroy Somer, Mecc Alte and Marathon
- Compared with replacement before the rewind is approved
Engine Overhauls
Top-end overhauls and full rebuilds for residential, commercial and industrial generator engines, carried out at your premises. We confirm the wear first, so you pay for an overhaul only when the engine needs one.
- Wear confirmed before anything is stripped
- Cylinder head, valves, rings, liners and bearings as needed
- Run and tested before handover
- Quoted in writing against the cost of replacement
Changeover Switch Repairs & Installation
Manual and automatic changeover switches repaired, replaced and installed, so the generator can never feed back into the mains. We issue and sign the electrical Certificate of Compliance for the changeover switch installations we carry out.
- Faults traced with the board made safe
- Switches sized for the generator and the load
- Both positions tested on mains and generator
- Electrical CoC for our installations
Servicing & Maintenance
Servicing and maintenance by generator type and site
Each page covers what a service includes for that kind of generator, how visits are booked for a time that suits you and how maintenance plans are set up.
- Diesel Servicing & Maintenance Standby canopies to three-phase diesels
- Petrol Servicing & Maintenance Portable and inverter sets, serviced at home
- Standby & Emergency Maintenance Backup sets kept ready to start
- Commercial Servicing & Maintenance Offices, shops, complexes and warehouses
- Industrial Servicing & Maintenance Factories and plant, by running hours
- Maintenance Contracts & SLAs Customised plans, no fixed packages
Additional
Additional Generator Services
Installation is available when a generator is being placed. Repairs, servicing and maintenance remain the primary services above.
Electrical and control
Generator Electrical & Control Services
Controller diagnosis, replacement and programming is a specialist electrical capability. It sits with the control panel, the ATS and existing controller repairs.
Technical Services
Fault finding, alternators and commercial plant
These pages sit beside the main service list. They cover diagnosis, the alternator, automatic transfer, the controller module, and repairs for commercial premises or larger industrial sets.
- Generator Fault Finding Identify the cause before parts are replaced
- Generator Tools Size, fuel, service-due and symptom tools
- Alternator Repairs Output, excitation and winding assessment
- ATS Repairs Automatic transfer switch faults
- Controller Repairs DSE, SmartGen and module faults
- Residential Generator Repairs Home generators, repaired at the house
- Commercial Generator Repairs Offices, retail, complexes and warehouses
- Body Corporate Maintenance Contracts and SLAs for schemes and estates
- Industrial Generator Repairs Larger diesel and heavy standby systems
Starting and Fuel
Charging, starters and diesel fuel
These pages sit beside the main service list. They cover the charging system, the starter, and diesel fuel delivery without replacing the broader repair pages.
- Battery Charging System Chargers, cables and standby batteries
- Starter Motor Repairs Click, slow crank and no crank
- Fuel Solenoid Repairs Diesel shutoff and run solenoids
- Fuel Pump Repairs Lift pumps and fuel delivery
- Diesel Injector Service Hard starting, smoke and rough running
- Generator Guides Service intervals, ratings and data plates
Cooling and Engine
Cooling, oil and diesel smoke
Cooling-system repairs, coolant loss, oil leaks and oil-pressure alarms are separate from a general overheating page. Black smoke and white smoke are separate diesel symptoms.
Generator Faults
Common generator problems we diagnose
If the set already has a fault, these pages explain the symptoms we see on site and the repairs that usually follow — without treating every breakdown as the same job.
- Generator Not Starting Will not start, even in manual
- Cranks But Won't Start Engine turns, will not fire
- Not Auto Starting Standby set stays silent when mains fails
- Starts Then Stops Fires, then shuts down
- Trips Under Load Runs until the load is connected
- Not Producing Power Runs, but there is no usable output
- Low Voltage Voltage is present but too low
- Unstable Voltage Voltage hunts or lights flicker
- Low Frequency Hz or engine speed is too low
- Generator Overheating High-temperature shutdowns
- Diesel Generator Repairs Standby and commercial diesels
- Petrol Generator Repairs Home and portable petrol units
Planning a Visit
Sizes, makes and how a callout works
These pages sit beside the service list. They explain generator size, the makes we already publish, and how an onsite visit is booked.
Common Questions
Frequently Asked Questions
What generator brands do you repair in Gauteng?
Published pages cover Cummins, Perkins, Caterpillar, Deutz, Volvo, FG Wilson, Kohler, Kipor and Ryobi, among the diesel, petrol and gas brands listed on the brands page. An unlisted model is assessed when the fault and the parts make a visit sensible. Size is read from the data plate.
How quickly can you respond to an emergency callout?
We are open 24 hours a day, 7 days a week, and we arrive within 1 hour for emergency callouts anywhere in Gauteng. The after-hours callout is R700 to R1,400. The callout fee is only payable if you do not accept the quotation. If you accept the quotation, the callout fee is waived.
Can you service a business generator on a regular schedule?
Yes. Visits can be booked at intervals that follow the manufacturer’s schedule, running hours and how the set is used, and each visit is recorded and quoted. Maintenance plan clients are scheduled ahead of new callouts if the set breaks down between visits.
Which areas in Gauteng do you cover?
All of Gauteng: Johannesburg, Pretoria, Midrand, Centurion, Sandton, Randburg, Roodepoort, Germiston, Boksburg and surrounding areas.
Can you fix a generator that won't auto-start when the power goes off?
Yes. Auto-start failures are usually a faulty AMF/ATS controller, battery, or fuel issue. Most are resolved on the first visit with parts carried on our vehicles.
More questions? Visit our full FAQ page or call us directly.
Need Generator Service Today?
Emergency or planned, we cover all of Gauteng, 24/7. For breakdowns we arrive within 1 hour.