Cat Generators From an Independent Team That Also Keeps Them Running

Caterpillar engines power an enormous share of the world’s large diesel generators, which is why buyers looking for a reliable set so often start here. The catch is that a famous badge says little about the particular unit in front of you. This site is about the unit: its history, its fit for your site and the support it will get once it is running.

USP&E sources, inspects, rebuilds and maintains Cat generators as an independent company. We are not part of Caterpillar’s own network and do not claim to be; what we offer is engineering judgement, documented equipment and a team that stays involved after delivery.

What we can supply

• Used Cat sets with documented hours, service history and witnessed load tests.
• Rebuilt engines and complete sets, overhauled to a written scope.
• Containerised and enclosed packages for remote and mobile duty.
• Multi-unit plants with paralleling controls, built from matched sets.
• Service, spares and O&M for Cat fleets, whoever supplied them.

Before you choose between a used and a rebuilt engine, read our note on deciding between reman and used Cat, and see how we inspect a used Cat genset before it is offered.

The 3516 and the big Cat engines

For megawatt-class duty, the 3500 series dominates our Cat work, and the V16 3516 is the engine buyers ask about most. Our page on the Cat 3516 generator covers ratings by duty, overhaul planning and what to check on a used unit. For maintenance and rebuild background across the family, USP&E’s notes on servicing 3500 engines go further.

Site conditions decide the rating

A Cat set rated for a cool coastal site can lose usable output on a hot plateau. Altitude, ambient temperature and dust all reduce what an engine can deliver, and the cooling package must be sized for the worst day. Our article on altitude derating for Cat-class sets explains the adjustment, and prime versus standby for Cat-class engines covers how duty changes the number on the data plate.

Why buyers compare makes before deciding

Cat is not always the right answer. Parts reach in your country, the skills of your technicians and the rest of your fleet all matter. USP&E’s comparison of industrial generator makers is a fair place to start, and our engineers will tell you when another make would serve you better.

Mining and remote power

Many of the Cat sets we supply go to mines and remote plants where they run long hours far from support. That changes what we check, how we pack them for shipment and which spares travel with them; see export packing for Cat gensets. USP&E’s mining power work covers the wider plant, from camp supply to processing loads.

How we inspect before we offer

Each Cat set we list goes through the same sequence. We record the data plates, read the controller’s event history, take oil and coolant samples for laboratory analysis and check crankcase blow-by. The alternator gets an insulation resistance test. After that comes a resistive load test, raising output stage by stage to the full rating, with temperatures, pressures, voltage and frequency logged at every stage. The results go into the file that travels with the unit, and buyers can attend the test or watch it on video.

Where the inspection shows work is needed, we say so and price it separately, so the buyer can choose between taking the set as it is or having us bring it up to standard first. Common findings include worn turbochargers, tired injectors, coolant system scale and aged hoses and belts, none of which is a reason to reject a good engine, but all of which belong in the price.

Older Cat sets may also need controller upgrades to talk to modern switchgear or remote monitoring. We check controller versions during inspection and can quote a retrofit so the set fits the site it is going to rather than the site it came from.

Paralleling and multi-unit plants

Several of our projects combine a number of Cat sets into one plant, sharing load through paralleling switchgear. That approach lets units be serviced one at a time and lets the plant grow with demand. Our guide to paralleling Cat packages explains the controls and protection involved, and O&M support for used generators covers how we keep such plants running.

Questions about our Cat sets

Is USP&E part of Caterpillar?

No. Caterpillar has no stake in USP&E and has not appointed us. We trade in, rebuild and look after Cat equipment on our own account, alongside other makes.

Do your used Cat generators come with history?

Yes. Every unit we offer comes with its hours, the service records we hold and test readings, and you can witness a load test.

Can you service Cat sets we bought elsewhere?

Yes. Where a set came from makes no difference to us; we maintain and repair Cat generators from any source and can run full O&M for a fleet.

Which Cat engines do you handle most?

Mostly the large 3500 series engines, especially the 3516 and 3512, along with smaller Cat sets for standby and site power.

Ask about a Cat set

Send the load, duty, frequency and site conditions, or the details of a listing you are weighing up. An engineer will list the checks that matter and say whether we hold a closer fit. Speak to a Cat specialist. Prefer the phone? Our number is +27 10 822 2324. Data plate photos and listings can be forwarded to info@uspeglobal.com.

Powering Possibility. Built for the Frontier.