Phone answered 24/7. Mobile service across Northeast Florida.
East Coast Diesel & Marine Heavy Equipment · Truck · Marine
Field service · Northeast Florida

Mobile Heavy Equipment RepairWe bring the shop to the job site.

Excavators, dozers, wheel loaders, skid steers, track loaders and backhoes repaired where they sit. One truck comes to you instead of a lowboy taking your machine away for three days.

Phone answered 24/7. Based in St Johns, working fifteen towns across eleven counties.

On Site
Field repair first
24/7
Phone answered
15 Towns
11 counties
No Lowboy
Machine stays put
What this is

Mobile Heavy Equipment Repair across Northeast Florida.

A machine that quits in the middle of a pad is not really a repair problem. It is a schedule problem. The repair might be four hours of work, but hauling it out and back turns that into most of a week, and the crew, the rental clock and the completion date all keep running while it sits on a trailer.

So we work the other way around. The service truck comes to the job site with diagnostic gear, hand tools, fluids and the wear parts that break most often, and the machine gets fixed where it is standing. Roadside, on a pad, in a pit, in a fleet yard, at the back of a farm, in a subdivision that is still mud.

That covers a lot more ground than people expect. Hydraulic leaks and blown hoses, electrical faults, cooling and fuel systems, starters and alternators, sensors, brakes, hydraulic cylinders and a fair share of engine work all get handled in the field. Some jobs genuinely need a roof and a lift, and we tell you which one you are looking at on the first call rather than after the teardown starts.

Machine make does not matter much. What matters is whether the failure is one we can reach and repair safely where the machine sits. Describe the symptom and we will tell you honestly which side of that line it falls on.

At a glance

Service
Mobile Heavy Equipment Repair
Where
On site and in the shop
Hours
Answered 24/7
Base
St Johns, FL 32259
Coverage
15 towns, 11 counties
Diagnostics

Signs your machine needs a service truck today

Six things we hear on the phone most weeks, and what each one usually turns out to be.

It quit and will not restart

A machine that dies under load and refuses to fire is usually fuel, air or a sensor, not a rebuild. The worst thing you can do is keep cranking on it. Every attempt fills the cylinders with more fuel and washes the bores down.

Hydraulics have gone slow or weak

Slow travel, weak breakout force, cycles that used to be quick and now crawl. Pump wear, a stuck relief valve, a clogged suction screen or a plugged filter. It will not get better and running it hot makes the pump worse.

A leak that keeps coming back

A hose that has been replaced twice in a month is not a hose problem. Something is chafing it, over-pressuring it, or the fitting is wrong for the application. Chasing the leak instead of the cause is how you fund three repairs. What to do when a hose blows.

Temperature climbing under load

Radiator packed with dust and chaff, a failing water pump, a bad fan drive, or a head gasket starting to let go. Heavy iron in Florida heat has very little margin, and a machine that runs hot for a week rarely stays a cheap repair.

Codes, lights and a machine in derate

Modern machines protect themselves by cutting power. Clearing the code without finding the cause buys you about a week. Aftertreatment faults, sensor drift and rubbed-through harnesses all look identical from the seat. DEF and DPF derates explained.

Noises that changed this week

Operators know their machines. A whine, a knock or a grind that was not there on Monday is worth a phone call on Tuesday, not a month from now when it has taken the bearings and the housing with it.

The work

What the job actually involves

01

Talk it through first

We ask what the machine is, what it was doing when it failed, what changed and where it sits. That conversation decides what parts come on the truck and whether the job is a field job at all.

02

Get to it safely

Access matters more than people think. Soft ground, a machine on a slope, a boom in the air or a bucket loaded are all things that get sorted before a wrench comes out.

03

Diagnose with instruments

Pressures, flows, voltages, live data off the ECM. Guessing at parts on somebody else's dime is how shops lose customers, and it is how machines come back broken twice.

04

Give you a number

You get the cause and a price before the repair starts. If it is going to run past what the machine is worth fixing in the field, you hear that instead of a running bill.

05

Do the work

Parts sourced, repair made, torque specs followed. The common wear items are already on the truck. Anything ordered gets scheduled so you are not waiting on a surprise.

06

Test it under load

A machine that idles fine in the yard is not repaired. We work it, watch temperatures and pressures, and confirm the fault is actually gone before the truck leaves.

Equipment

What comes out on the service truck

  • Diagnostic laptop and manufacturer adapters
  • Hydraulic hose and fittings made on site
  • Welder and cutting torch
  • Air compressor and impact tools
  • Jacks, stands, pullers and rigging
  • Fluids, filters and common wear parts
  • Work lights for night calls
A pickup with a toolbox will not fix an excavator. Plenty of what shows up to a breakdown call is a truck and a hope. If the outfit you call cannot make a hose, cut steel or read the machine's own data, you are paying for a trip, not a repair.
Mobile service truck with a boom crane repairing a tracked excavator in the field
Excavator repair in the field, truck pulled up alongside.
Machine by machine

Excavator, dozer, loader and skid steer repair.

The same truck works all of these. What tends to fail differs by machine, so here is where each one usually goes wrong.

Excavator repair

Swing and travel motors, main pump wear, blown boom and stick hoses, worn pins and bushings in the linkage, and the electrical faults that drop a newer machine into limp mode. Mini excavators get the same attention. When the trouble is in a pump or a cylinder, that is hydraulic repair, and it is field work too.

Dozer repair

Final drives, track tension and undercarriage wear, blade lift and tilt cylinders, steering and brake problems on older machines, and cooling packs plugged solid with dust. On site work and land clearing the undercarriage takes the beating, which is why it has its own page: final drive and undercarriage repair.

Wheel loader repair

Transmission and torque converter complaints, brake wear, articulation joint and pin wear, lift and tilt cylinders, and the pump that runs all of it. Diagnosis happens on site either way. A transmission that has to come out is a shop job, and you hear that up front. Loaders in plants and pits run long hours, which makes scheduled maintenance the cheapest repair they ever get.

Skid steer and track loader repair

Drive motors and chain cases, hydrostatic drive faults, quick attach and auxiliary hydraulics, safety interlocks that will not release, and rubber tracks walking off the rollers. Compact machines pack a lot into a small engine bay, so reading the machine beats guessing at parts. Diesel diagnostics is where most of these calls start.

Backhoe and motor grader repair

Backhoes: loader and hoe hydraulics, swing cylinders, stabilizers and the shuttle transmission. Graders: circle drive wear, moldboard hydraulics, tandem drives and the electrical behind modern grader controls. Both get the same approach. Diagnose on site, fix on site when it is safe and sensible, and say so when it is not.

Forestry mulcher repair

Mulcher heads, drive belts and bearings, high flow hydraulic circuits running hot, cooling packs choked with chips, and carriers that live in the worst conditions any machine sees. Down time in land clearing is counted in acres, so this is field work almost by definition.

Machines and engines

ExcavatorsMini excavatorsDozersWheel loadersTrack loadersSkid steersBackhoesMotor gradersTelehandlersForestry mulchersTractorsGenerators

Systems and components

EnginesHydraulicsElectricalCoolingFuelAftertreatmentTransmissionsUndercarriageBrakesAir systems
Mobile versus hauling it in

What a haul to the shop really costs you.

The repair bill is the part everybody looks at. It is usually not the expensive part. Run your own numbers down this list before you call a hauler.

Where the money actually goes when a machine leaves the job site
Line itemHaul it to a shopMobile repair on site
TransportLowboy both ways, plus a permit if it is oversizeNone
Loading timeMachine and operator tied up on both endsNone
Crew downtimeDays, not hours, and they are still on payrollHours in most cases
ScheduleYou wait for a hauler and then a shop slotYou wait for one truck
Rental replacementOften needed to keep the job movingUsually not
Liquidated damagesPossible if the job has a completion dateUsually avoided
Some jobs are still shop jobs. A crank that needs to come out is not getting done in the sand no matter who tells you otherwise. The point is that most of them are not that job, and nobody should be hauling a machine across the county for a hose, a sensor or a starter.
How a call goes

How mobile equipment repair works.

STEP 01

You call

Tell us the machine, the symptom and where it sits. We ask a few questions so the right parts come with us.

STEP 02

We tell you straight

Field job or shop job, and roughly when we can be there. If we are too far out to help today, you hear it on the first call.

STEP 03

We diagnose on site

Pressures, codes, readings. You get the actual cause and a number before a wrench turns on the repair.

STEP 04

Back to work

We fix it, test it under load and clean up. You get told what failed and what to watch so it does not happen twice.

Emergency heavy equipment repair?

Call. Do not fill in a form and wait. The phone is answered around the clock and you will get an honest answer on that first call about whether we can reach you in time to do any good.

Have this ready when you call

  • Make and model of the machine, truck or engine
  • What it is doing, in your own words
  • Any codes showing on the dash
  • Where it sits and how a service truck gets to it
  • Whether it can be moved at all
  • A number that gets answered on site
Questions we get

Mobile Heavy Equipment Repair questions.

Do you repair heavy equipment on the job site?
Yes, that is the main thing we do. The service truck comes to the machine with diagnostic gear, tools, fluids and common wear parts. Hydraulics, electrical, cooling, fuel, brakes and a good share of engine work all get handled in the field.
What kinds of heavy equipment do you work on?
Excavators, mini excavators, dozers, wheel loaders, track loaders, skid steers, backhoes, motor graders, telehandlers, forestry mulchers, tractors and generators. If you are not sure yours fits, call and describe it.
What if the repair turns out to be too big for the field?
Then we say so. Some jobs need a roof, a lift and a clean bench, and pulling a machine apart in the sand to find that out helps nobody. You get that judgment on the first call where we can, and immediately after diagnosis where we cannot.
How fast can you get to a machine that is down?
It depends on where you are, what time it is and what else is broken that day. Jacksonville, St. Augustine and Green Cove Springs are close to home. Ocala, Gainesville and Daytona are a longer run. Call and you will get a real window instead of a guess.
Do you charge a call out fee?
Yes, there is a call out charge that covers getting the truck and the technician to you. Call for the current rate. Diagnostic time gets rolled into the repair when we do the work.
Can you work on a machine that is stuck in soft ground or on a slope?
Sometimes, and sometimes the honest answer is that it needs to be moved or supported first. Safety on access is not negotiable. Tell us where it sits and how it is sitting when you call, and we will sort that out before the truck rolls.
Do you carry parts, or do we wait on an order?
Common wear parts, filters, fluids, hose and fittings ride on the truck. Anything model specific gets sourced, and we tell you the timeline instead of leaving you guessing.
Do you work weekends and nights?
The phone is answered around the clock. Whether we can roll right then depends on where you are and what else is down, and you get a straight answer on that first call.

Related services

Heavy equipment repair covers the machine. These pages cover the systems inside it.

Machine down

Call it in and get a truck rolling.

Tell us the machine, the symptom and where it sits. If we can help, you will know on the first call. If we cannot get to you in time to do any good, we will say that too.

(904) 496-2937
East Coast Diesel & Marine
Mobile heavy equipment, diesel and marine repair
Serving Northeast Florida and Southeast Georgia
Based in St Johns, FL 32259
(904) 496-2937 · eastcoastdiesel904@gmail.com
Hours: phone answered 24 hours, 7 days
Not urgent

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