Equipment down?
We come to the site.
Excavators, loaders, backhoes, skid steers, cranes, generators and compressors — diagnosed and repaired where they sit. No lowboy, no hauling it out, no waiting for a bay to open up.
The machine isn't the expensive part. The crew standing around is.
Hauling a machine to a shop means a lowboy both directions, a spot in someone's queue, and a job that stops moving in the meantime. Field service skips all of it. Most of what puts equipment down — hydraulics, electrical, charging, cooling, a sensor — gets found and fixed in place.
Equipment & machines
Construction, utility, and municipal fleets. If it runs on diesel and works for a living, it's familiar.
- Excavators
- Wheel loaders
- Backhoes
- Skid steers
- Cranes & boom trucks
- Aerial & scissor lifts
- Diesel generators
- Air compressors
- Light towers
- Rollers & compactors
- Water & vacuum trucks
- Utility service rigs
Systems we diagnose and repair
Diesel engines
Caterpillar, Cummins, Isuzu and Detroit Diesel, including the older two-strokes most shops won't touch anymore. Hard starts, no starts, overheating, power loss, smoke, oil pressure. Factory trained by Cat, Cummins and Isuzu.
Hydraulics
Hoses, fittings, cylinders, pumps and valves. Slow or weak function, drifting cylinders, overheating oil, a leak nobody can find. Most of it is a pressure problem or a seal, and most of it is fixable in the dirt.
Electrical & charging
Won't crank, won't stay running, dash lit up like a Christmas tree. Alternators, starters, batteries, grounds, harnesses and the corroded connector behind the panel that's been intermittent for six months.
Also: cooling systems and overheating, air conditioning (EPA 608 Universal and 609 certified), fuel systems, belts and hoses, and scheduled service so the machine stops surprising you.
Cat factory trained,
thirty years in the dirt
RES Heavy is Russell Schwartz — master diesel technician, factory trained by Caterpillar, Cummins and Isuzu.
Decades of work on construction and utility equipment, including years supporting municipal and commercial fleets. Factory training on Cat matters on a job site: it's the difference between reading a fault code and knowing what that code actually means on that machine.
One call, one technician, one truck. The person who answers the phone is the person who shows up. Call or text (949) 254-4518.
- Master diesel technician, 30+ years
- Factory trained: Caterpillar · Cummins · Isuzu
- Detroit Diesel, including two-strokes
- Hydraulics & electrical diagnostics
- EPA Section 608 Universal & 609
- Commercial Driver License (CDL)
Equipment questions
Can you repair equipment on an active job site?
Yes. That is most of what we do. RES Heavy comes to the site with a fully equipped service truck and works on the machine where it sits, so it never has to be loaded onto a lowboy and hauled out. Call (949) 254-4518.
Do you work on generators and air compressors?
Yes. Diesel generators, towable compressors, light towers and other auxiliary equipment. If it has a diesel engine, hydraulics or a charging system, it is in scope.
What if the machine can't be moved at all?
That is the normal case, not the exception. A machine that will not start or will not travel is exactly why field service exists. Tell us what it was doing when it quit and we will bring what we need to diagnose it in place.
Do you do hydraulic repairs in the field?
Yes. Hoses, fittings, cylinders, pumps and valve troubleshooting. Most hydraulic failures on a job site are a leak or a pressure problem that can be found and fixed on the spot rather than in a shop.
Machine down and the crew's waiting?
Call or text. A photo of the machine and the data plate helps us show up with the right parts.