Excavator Repair Service in Midland, TX

Excavator repair at Chris’s Diesel Service in Midland. Boom and arm hydraulics, swing drives, travel motors, undercarriage and track repair, engine and electrical repair, bucket and structural work, and scheduled maintenance for compact excavators through full-size tracked machines. We diagnose before we quote, fix the actual failure, and prove the repair under load before the machine goes back to digging.

Call (432) 557-6500
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Allsizes
Compact to Full-Size Machines
Fieldready
8,000 lb Crane Service Truck
Zero
Comebacks Since 2025
What You Notice → What It Usually Is

The Machine Tells You. If Someone Listens.

These are the complaints that bring excavators in, and where the testing usually lands. Diagnosis comes before parts, every time.

Boom or arm is slow, weak, or drifts down
Likely Path Cylinder seals bypassing, a worn main pump, or a relief valve set wrong. We pressure-test the circuit and check cylinder drift against spec before condemning anything, because a seal kit and a pump are very different tickets.
Swing is jerky, noisy, or lags on one side
Likely Path Swing drive gearbox wear, a failing swing motor, worn slew ring teeth, or low charge pressure. Oil condition from the swing case tells most of the story. Caught early it is a bearing and seal job, run long it becomes a gearbox or a slew ring.
One track travels slower or the machine pulls
Likely Path Travel motor wear, a sticking counterbalance valve, or final drive damage. We compare drive pressures side to side under load. Track motor and travel motor repair, final drive rebuilds, and undercarriage checks happen in the same visit, since a worn track chain and a weak motor mask each other.
Track chain is stretched, rollers leak, or pads are worn
Likely Path Track roller and bottom roller wear, stretched track chain and bushings, or a track adjuster and tensioner that will not hold grease. We measure chain stretch, bushing turn, and roller wear against spec before quoting, because a full undercarriage and a couple of rollers are very different money.
Hydraulics overheat by mid-morning
Likely Path A plugged cooler packed with dig dust, degraded oil, an internal bypass, or a relief dumping constantly. Excavators idle hot and work hard, and West Texas heat exposes a marginal system fast. We find where the heat is being made, not just where it shows up.
Engine derates or throws codes under load
Likely Path Fuel supply restriction, boost or emissions faults, or sensor problems. We pull live engine data and test the actual system before replacing parts. The code says where to look, not what to buy. Wiring and sensor faults get traced on our heavy equipment diagnostics side.
Attachments respond slow or not at all
Likely Path Auxiliary circuit flow set wrong, a failing solenoid, or coupler and quick-disconnect problems. Flow and pressure get measured at the attachment circuit so the fix lands on the right component.
Cab AC blows warm by mid-afternoon
Likely Path Compressor wear, a leaking condenser, or refrigerant lost at a fitting. Excavator cab AC repair is not a luxury in West Texas, since an operator who cannot stay in the seat costs you the same as a machine that will not dig. We leak-test and repair the fault rather than topping it off and sending you back out.
How Excavator Repair Works

Test. Repair. Prove It.

The same discipline we run on every machine in the shop, applied to excavators.

  1. 01

    Measure the System

    Hydraulic pressures and flows measured against machine spec, engine data pulled, oil condition checked. The failure gets identified by numbers, and you get an itemized written quote before work begins.

  2. 02

    Fix the Failure

    Cylinders resealed, pumps and motors repaired or replaced, drives rebuilt. OEM parts when they exist, best available standard when they do not. Contamination flushed so the new part does not eat the old failure.

  3. 03

    Prove It in the Dig

    Dig, swing, and travel functions cycled under load, pressures and temps confirmed against spec. The repair is proven under load before Chris signs off on release, not after your operator finds the problem again.

Welder repairing a cracked excavator boom arm with a MIG welding torch at the Midland shop
Excavator Repair Shop and Field Service

One Shop for the Whole Excavator.

Hydraulics at one vendor, engine at another, electrical at a third. That is how excavator repairs drag on for weeks. Here the whole machine is in scope under one roof, the same excavator mechanics see it through, and one person is accountable for the result.

  • Hydraulics In Scope Pumps, motors, cylinders, valves, swing drives, and travel drives. Pressure-tested to spec, not judged by feel. Pump teardowns and contamination flushes run through our hydraulic system repair service.
  • Engine In Scope Diagnostics, repair, and full in-house rebuilds by Chris and his team. Not outsourced, test-run before delivery.
  • Shop or Field 140 x 150 ft shop in Midland for teardown work, and mobile excavator repair from an 8,000 lb crane service truck for repairs where the machine sits. Field service reaches Odessa and across the Permian Basin.
  • OEM Standard OEM parts when they exist. Best available standard when they do not. Never bargain-bin hydraulic components.
Structural and Attachment Work

Cracks and Worn Buckets Do Not Fix Themselves.

Hydraulics get the attention, but a cracked boom or a bucket with no cutting edge left costs you the same production time. Both get repaired here, by the same people.

Excavator bucket repair and attachments
What We Do Bucket damage, worn cutting edges, cracked attachment points, coupler problems, hydraulic breaker faults, and auxiliary circuit issues all cost you digging performance. We check the attachment and the circuit that runs it before quoting repair or replacement, because a worn coupler and a flow setting are very different tickets.
Boom, stick, arm, and structural repair
What We Do Cracked booms, damaged sticks and arms, and stress cracks around pin bosses get repaired properly with in-house welding and fabrication, not patched to fail again next month. Structural work is inspected before and after, and the machine is worked under load before it leaves.
Excavator FAQ

Common Questions

What sizes of excavators do you service?
Compact and mini excavators through full-size tracked machines. The 140 x 150 ft shop has the room and door height for large equipment, and the crane service truck handles field repair for machines that are not worth hauling. If it digs and runs on tracks, it is in scope.
Why is my excavator boom drifting down?
Usually cylinder seals bypassing internally, sometimes a leaking holding valve. We measure drift rate against spec and pressure-test the circuit to separate the two, because the repairs cost different money. Drift that is in spec gets left alone and we tell you so.
Can you repair a cracked excavator boom or a damaged bucket?
Yes. Cracked booms, damaged arms, worn bucket cutting edges, and failed attachment points are repaired in the shop with welding and fabrication. We look at what caused the crack before welding it, because a repair that ignores the cause comes back. Structural work is verified under load before the machine leaves.
Do you rebuild swing drives and travel motors?
Yes. Swing drives, travel motors, and final drives are repaired or rebuilt depending on what the teardown shows. Caught early, many are a bearing and seal job. We give you the honest call between rebuild and replacement based on measured wear, not the biggest ticket.
Do you repair excavator tracks and undercarriage?
Yes. We measure chain stretch, bushing turn, and roller wear against spec before quoting anything. Rollers leak and chains stretch on their own schedule, so replacing a full undercarriage when three rollers are bad is money you do not need to spend. Track motors and final drives get pressure-tested the same visit, since a weak motor and a worn chain feel identical from the seat.
Can you service my excavator on the job site?
Yes. Our service truck carries an 8,000 lb crane and covers a 100-mile radius around Midland, which reaches Odessa and most of the Permian Basin. Mobile excavator repair covers hose failures, cylinder swaps, and component changes where the machine sits, which beats paying a lowboy both ways for a one-day repair.
What does excavator repair cost in Midland, TX?
It depends on what the testing finds, and that is the point of testing first. A relief valve adjustment and a main pump are not the same job. You get an itemized written quote after diagnosis and before any work begins. Call (432) 557-6500 and describe what the machine is doing.

Excavator Down? Job Waiting?

Get it diagnosed by numbers, repaired once, and proven under load before it goes back to the dig. Shop or field, one call covers it.

Call (432) 557-6500
Request a Service Estimate
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