Hydraulic Motor Repair and Rebuild

Hydraulic motors are precision components, and when one starts losing torque, running hot, or leaking past the shaft seal, the cause is almost always internal wear that worsens with continued operation. We provide complete hydraulic motor diagnostics, testing, rebuilding, and in-house custom machining for construction, agriculture, material handling, and industrial customers throughout Denver and the Front Range.

Equipment We Service

Hydraulic motors are the workhorses behind the machines that keep Front Range jobsites, farms, and yards running. We regularly service motors from:

Skid steers — drive motors and auger/attachment motors are among the most common rebuilds we see, especially on machines running daily on construction sites where dust and debris accelerate wear.

Dozers and track loaders — final drive motors and track motors take heavy continuous load and are prone to internal leakage and bearing wear over time.

Excavators — swing motors, travel motors, and attachment-drive motors (augers, compactors, mulchers) often show valve plate scoring or piston block wear after years of cycling.

Wheel loaders and forklifts — wheel motors and drive motors that see stop-and-go duty cycles and high torque demands.

Agricultural equipment — augers, grain cart drives, feed mixers, and irrigation systems running gerotor or vane motors.

Conveyors, mixers, and fixed industrial equipment — gear and vane motors in continuous-duty applications where downtime directly impacts production.

Diagnostic Testing

Before any repair work begins, every motor goes on our hydraulic test bench to establish a baseline: flow, pressure, speed, volumetric efficiency, and case drain rate. This identifies exactly what’s failing — gerotor sets, vane assemblies, piston blocks, valve plates, bearings, or shaft seals — and whether a rebuild makes sense or replacement is the better call. After rebuild, every motor goes back on the bench and is tested against OEM performance specifications before it’s returned.

Common Failure Modes

Internal leakage past worn gerotor sets or piston/cylinder block clearances, scored or pitted valve plates, shaft seal failure from contamination or excess case pressure, worn bearings causing shaft play, and worn commutation components are the most frequent issues we find. Front Range conditions — dust, debris, gritty soil, and large seasonal temperature swings — accelerate contamination-related wear, particularly on open-circuit systems without adequate filtration.

Custom Machining to OEM-Spec

When stock replacement parts aren’t available, are backordered, or don’t fit older or modified equipment, we machine new components in-house: shafts, valve plates, gerotor sets, housings, and wear plates, manufactured to OEM tolerances. This keeps legacy and hard-to-source equipment running without weeks of downtime waiting on parts.

Our Rebuild Process

Every motor that comes through our shop receives a full teardown and inspection, cleaning and parts evaluation, machining or sourcing of replacement components, precision reassembly with new seals, bearings, and wear components, and final bench testing to confirm performance meets or exceeds OEM specifications.

Frequently Asked Questions

How do I know if my hydraulic motor needs to be rebuilt vs. replaced? Bench testing tells us the real story. If internal wear is limited to seals, bearings, and standard wear components, a rebuild typically restores like-new performance at a fraction of replacement cost. If the housing or major castings are damaged beyond repair, we’ll let you know and discuss replacement options.

What are signs my hydraulic motor is failing? Loss of torque or speed, excessive heat, unusual noise, fluid leaking from the case drain or shaft seal, and erratic or jerky operation under load are all common warning signs.

Can you rebuild motors for older or discontinued equipment? Often, yes. Our in-house machining capability lets us manufacture replacement components — shafts, valve plates, gerotor sets, and more — when OEM parts are no longer available.

How long does a hydraulic motor rebuild take? [Insert typical turnaround time]

Do you offer pickup and delivery for heavy equipment motors? [Insert pickup/delivery details]

What’s included in your bench testing? We test flow, pressure, speed, volumetric efficiency, and case drain rate both before and after rebuild, confirming the motor meets OEM performance specifications.

What areas do you serve? We serve Denver, Aurora, Lakewood, Boulder, Fort Collins, Colorado Springs, and the broader Front Range.