Repair Shop

Available At Adams-ISC(800) 677-7335

Hydraulic Equipment, Truck and Trailer, and Heavy Equipment Repair Shop

In our Rapid City repair shop or at your work-site with our fleet of field service trucks, Adams-ISC has the equipment and experience to keep your equipment running at peak performance. Our technicians are trained to handle hydraulic repairs for equipment used in industrial markets including off-highway, construction, mining, energy, and agriculture. We have the capabilities to rebuild and re-manufacture most types of pumps, motors, valves, and cylinders up to 14” diameter and larger. We specialize in standard and specialty industrial equipment repair, manufacturing, and rebuild –plus we’ll take on those one-off projects that other shops won’t touch.




Hydraulic Repair, Rebuild, and Testing

Adams-ISC provides repair services for virtually any hydraulic component including cylinders, pumps, motors, valves, tanks, winches, cranes, hoists, hoses, fittings, and power units.  When a hydraulic unit is brought in to our shop for repair it is first disassembled and cleaned for a thorough inspection and all precision fits are checked for tolerances. Following a complete evaluation, an Adams-ISC hydraulic expert will provide a quotation for the repair.

Cylinder-Service-BenchUpon your approval, we will begin the rebuild process

  • Contact surfaces are reconditioned or replaced.
  • New seals, bearings, gears and other replacement parts are installed.
  • Obsolete or non-repairable parts are replaced with custom manufactured parts built by Adams-ISC machining experts
  • The system is reassembled and thoroughly tested
    • Our hydraulic test bench is the ultimate diagnostic tool, capable of thoroughly testing new or rebuilt components and sub-assemblies

We offer Hydraulic Repair on Equipment: 
Fork lift trucks, articulated trucks, pavers, dozers, crushers, logging trucks,  payloaders, planers, compactors, concrete equipment, cement trucks, tractors, combines, excavators, snow plow, dump trucks, bucket trucks, motor graders, skid steer loaders, rollers, cranes, backhoes, asphalt equipment, scrapers, tractors, trucks, trailers, wheel loaders, log splitters

Markets Served: Construction, agriculture, commercial, industrial, aggregate, mining, manufacturing, power generation, municipalities, forestry, oil, water treatment, waste management, energy, food and beverage, railroad

Geography Served: South Dakota, North Dakota, Western Nebraska, Eastern Montana, Wyoming

Hydraulic Cylinder Repair

Cylinders are essential pieces of hydraulic engineering equipment and keeping them regularly serviced and maintained can improve lifespan and performance. Adams-ISC offers a full range of industrial hydraulic services, including hydraulic cylinder repair up to 17 feet long. Re-torque capability up to 10,000 psi.

All brands and types of cylinders repaired to original factory conditions:

  • Two main styles of cylinders: Tie Rod and Welded Body
  • Special styles: Telescopic, Plunger, Differential, Position Sensing

Common Cylinder Issues:Cylinder-repair Leaking seals, scratches or pits on the cylinder bore, and bent rods. Scratches, gouges, or pitting in the cylinder bore and/or a bent piston require special equipment to perform the repair. To get the job done in a timely manner and to get it done right the first time, a professional hydraulic repair shop with the right training, tools, and equipment is your best option.

Repair of all basic cylinder parts including:  2-Stage and 4-Stage, pneumatic, hydraulic, cylinder barrel, cylinder base/cap, cylinder head, piston, piston rod, seal gland, seals

And repair of all other internal parts of a fully functioning component: Cylinder base connection, Cushions, Internal Threaded Ductile Heads, Head Glands, Pistons, Cylinder Head Caps, Butt Plates, Eye Brackets/Clevis Brackets , Mounts, Rod Eyes/Rod Clevis, Pivot Pins, Spherical Ball Bushings, Spherical Rod Eye, Alignment Coupler, Ports and Fittings, Follower Blocks, Cardboard Balers, Pressure and Parts Washers

Cylinder repair process consists of these basic steps: Disassembly of parts, diagnosing the problem, repairing or replacing damaged parts, rebuilding the cylinder, and final diagnostic testing.

Here are some of the services you can expect during your repair:

  • Assessment and Stripping: The cylinder will be stripped, inspected, measured, and pre-tested.  If required, a failure analysis will be conducted.
  • CylinderRebuildDesign Enhancement: Cylinders that have experienced continual problems or those that underwent catastrophic failure could be the result of poor design. Our experts will review the cylinder design and make any necessary adjustments to improve performance and lifespan.
  • Milling and Turning: We use milling and turning machines to assist in the repair and remanufacture of threads, pistons, barrels, rods, end caps, and other precision-engineered components.
  • Barrel Honing: An abrasive rotating tool is used to remove internal wear and metal from the interior surface of the cylinder barrel. Honing is done to finish the bore surface to a precise diameter with an improved surface finish.
  • Chroming: Chroming is a technique of electroplating a thin layer of chromium onto the external surface of cylinder rods for optimum levels of durability and corrosion resistance.
  • Welding: A variety of specialized welding techniques including TIG and MIG are used during the repair process of cylinder parts.
  • Assembly and Testing: Cylinder parts are re-assembled to achieve the original closed center and stroke distances.

All hydraulic cylinders are tested in-house before being returned. Testing ranges from basic pressure testing to more rigorous testing that can be tailored to your application. After testing, all cylinders are painted and special coatings are applied.

Hydraulic Pump and Motor Repair

Adams-ISC will fully analyze your hydraulic motor and pump to identify the cause of the problem. The unit will be disassembled, cleaned, inspected and checked for precise fit and tolerances. Any parts that are worn, broken, or missing are listed for replacement. Following our analysis, we will also let you of any recommendations we have that might improve the performance of your motor or pump.Repair-Shop-Guys

We have the state-of-the-art technology needed to test, troubleshoot, and repair hydraulic motors and pumps. All units are rebuilt to manufacturer’s specifications. We stock a large inventory of parts needed for the major brands of pumps and motors to expedite your repair.

We understand how critical it is to reduce equipment downtime and prevent costly shutdowns, so we work fast to get your pumps and motors repaired on time, every time.

Pump Types We Can Repair: Bent Axis Piston, Inline Piston, Chemical, Orbit, Fixed Volume Vane, Radial Piston, Gear, Variable Volume Vane

Motor Types We Can Repair:  Axial Piston, High Speed, Bent Axis Piston, High Torque/Low Speed, Gear, Radial Piston, Gerotor, Vane

Hydraulic Valve Repair

Hydraulic control valves are one of the most expensive and complex parts of a hydraulic system. It is important to have them serviced regularly to ensure proper performance. If your hydraulic valve is damaged or compromised, Adams-ISC has the ability to repair virtually any type of valve to meet or exceed OEM specifications. Our repair shop experts are highly skilled in hydraulic reconditioning and rebuilding. We always start by disassembling and cleaning the components thoroughly to allow us to inspect for flaws or parts that may require replacement.  Once a thorough inspection is complete, we are able to provide a free estimate and recommendations for repairing, rebuilding or replacing your hydraulic valve.

Hydraulic-Pump-PictureWe stock a large inventory of parts for major brands of hydraulic valves to expedite your repair.

Types of valves we repair: Check, directional, flow control, pilot, pressure control, proportional, relief, servo, slave, stack, and throttle

Our hydraulic valve repair services include: Honing, machining, chroming, grinding, and custom manufacturing obsolete parts such as springs, poppets, and spools.

Hydraulic Hose Assembly

Hose-clampOur trained hydraulic experts can manufacture and trouble-shoot custom hydraulic hoses to your specification. We have an unmatched parts inventory with a wide selection of hoses, fittings, and adapters. We understand that hose failures never happen at a good time and that you need your equipment back up and running fast. Broken hoses can result from advanced age, friction, pressure spikes, poor installation, and many other reasons. That is why we have some of the best-trained hydraulic specialists in the industry that can evaluate your hose and quickly determine what caused the failure. Let us help you by providing a solution that is cost effective and will help to prevent further repairs.

Complete hose replacement with new fittings, seals, and fluid for your entire system.

When we work on an assembly, we take the following into consideration to make sure we build a hose that meets your needs: Hose size, application, material flowing through, maximum working pressure, and fittings needed

Custom Hoses We Can Build: Braided, Specialty, spiral, suction and return, metric

Gearbox Repair (Speed Reducer Repair)

For a cost effective alternative to gearbox replacement, Adams-ISC offers full and partial gearbox rebuilds, as well as minor repairs such as gear changes, seal changes, and case rebuilds. Identifying the cause of a gearbox failure is a crucial step in preventing future equipment problems. To determine the root cause, we perform both oil analysis and vibration analysis along with a visual inspection. Once a diagnosis is made, our engineers can apply design changes to eliminate reoccurring issues. We use top quality replacement parts from our inventory of the most well-known manufacturers in the industry. You can expect gearbox restoration at a fair price along with knowledgeable service and a quick turnaround.

gearbox-repairRebuild and Repair Services We Offer: Full Rebuild, Partial Rebuild, Ratio Change, Seal Change, Housing Repair and fabrication, Directional change, Gear manufacture, Gear profile grinding, Reverse engineering, and  Emergency Repair

Gearbox Types We Can Repair: Bevel, Spur, Helical, Internal Splines, External Splines, Worm, Sprockets, Gear Racks

Markets We Serve: Oil and gas, mining, aggregate, agricultural, manufacturing, construction, food processing, wastewater, power generation, waste management, marine, chemical, utilities, and transportation.

Leading Causes of Gearbox Failure: Seal leakage, Bearing failure, Electrical fluting

Signs of Gearbox Problems: Excessive noise, Vibration, Major leakage or loss of fluid, Oil contamination

Here are some of the services you can expect during your gearbox repair:

  • Cleaning exterior of gearbox and identification
  • Disassembly and preliminary evaluation of condition and repairs required
  • Review gearbox condition and repair recommendations with the customer
  • Estimation of parts replacement, reverse engineered parts, and labor required for gearbox rebuild
  • Failure analysis during complete disassembly and evaluation of the component wear and damage
  • Cleaning of all internal components and housing
  • Rebuild or recondition worn out and damaged surfaces
  • Reverse engineer and manufacture new parts when OEM parts are obsolete or lead time is unacceptable
  • Reassembly of the gearbox per OEM specification and engineering instructions
  • Inspection and testing
  • 24/7 emergency service when requested by customer

Crane Repair and InspectionLift-Bucket-repair

Crane Repair

Adams-ISC is committed to providing crane owners the best maintenance and service solutions for all makes and models of crawler cranes, all-terrain cranes, truck-mounted cranes, rough terrain cranes, boom trucks, and industrial cranes. Our experienced service technicians are equipped to perform quick and efficient repairs on crane components such as hydraulic cylinders, cable pulleys, motors, pumps, and more.

Crane Repair Services We Offer:

  • Electrical and mechanical repairs
  • Modernization and upgrading
  • Crane and heavy equipment refurbishment
  • Boom and structural repair
  • Hydraulic and electrical troubleshooting
  • Mobile service capabilities, welding and mechanical
  • Crane and hoist replacement parts
  • OSHA certified inspections
  • Heavy duty trailer repair

Crane Inspection

Bring in your machines for our OSHA certified inspection service and we will assess every part of the crane make sure that it is performing and in good shape. If we identify any problems with your heavy machinery, we will inform you of the issues and give you options for service and repair. This can help to keep your business compliant with laws and safety standards and prevent minor problems from becoming large and expensive repairs.

Truck and Trailer Repair

Adams-ISC offers a wide variety of quality repair services to keep your truck or trailer moving. Our repair shop has the resources and manpower required to deliver a comprehensive range of repair and maintenance services for trucks, trailers, semis, commercial vehicles, and all types of heavy equipment.  No repair job is too big or too small for us to service.

Truck Repair Services

  • Chassis Repair
  • Floor, Door, Ramps, and Roof
  • Hydraulic systems
  • Hydraulic Dump Repair
  • Frame Straightening
  • Aluminum or Steel Repair
  • Fifth Wheel Repair
  • PTO Service
  • Frame Repairs
  • Fuel Tank Repairs

From fabrication to welding and everything in between, Adams-ISC is a full-service trailer shop, capable of assessing and resolving your equipment problems. We have the experience and parts on hand to handle your trailer service needs, small or large.

Heavy Equipment & Forklift Repair

Adams-ISC specializes in repair, maintenance, diagnostics, and troubleshooting of all heavy construction equipment.   We provide machining, welding, mechanical, and hydraulic services. Our work includes repair services, as well as custom machining and fabrication of new components. Our shops are equipped with state-of-the-art machines and tooling that enables us to perform any type of heavy equipment repair quickly and efficiently.

We want you to get the most life and use out of your equipment. Understanding your needs allows us to make the repairs necessary to save you time and money.

We handle everything from the blade to the drawbar:   Transmissions, Brakes, Hydraulic Systems, Torque Convertors, Idler Buildup, Roller Replacement, Pins, Bucket Repair, Bushings, Rails, Pads, Steering, Clutches, Plow Blade Repair, Cutting Edge Blade Repair

We offer Mechanical and Electrical Repair on:Equipment-repair Fork lift trucks, tractors, combines, articulated trucks, pavers, dozers, crushers, logging trucks,  payloaders, planers, compactors, concrete equipment, cement trucks, excavators, snow plows, dump trucks, bucket trucks, motor graders, skid steer loaders, rollers, cranes, back hoes, asphalt equipment, scrapers, tractors, trucks, trailers, wheel loaders, log splitters, dump trucks

Markets Served: Construction, agriculture, commercial, industrial, aggregate, mining, forestry, drilling

Major Brands We Repair: Caterpillar, John Deere, Komatsu, Case, Gehl, Bobcat, Thomas, Link-Belt, Terex, Hitachi, Dae-Woo, Kubota, Manitowac Cranes, Kobelco, JCB, Dynapac, New Holland, Leibherr

Some of the services we offer to our customers include:

  • Welding
  • Mechanical rebuilds
  • Hydraulic repair
  • Custom fabrication
  • Key-cutting
  • Component repairs
  • Fabricating hydraulic hoses
  • Machine modification
  • Line boring
  • Plasma cutting
  • Milling and turning
  • Machining

Forklift RepairForklift-Repair

Your forklifts are a key component to your distribution or warehousing operations so it’s important to make sure your lifts are running at peak performance. Adams-ISC has qualified professionals who can inspect and repair your forklift trucks, scissor lifts, and boom lifts. We are trained to diagnose, identify, and fix problematic areas to minimize your costs and increase the lifespan of your equipment. Correctly sourcing forklift parts can be challenging. We have developed strong working relationships with the industry’s leading parts suppliers, which allows us to get parts quickly and at reasonable prices.


  • Battery replacement
  • Lubrication
  • Refurbishment and reconditioning
  • Cast assembly rebuilding
  • Load wheels and bearings replacement
  • Tire replacement
  • Hydraulic cylinder rebuilding
  • Tune ups
  • Brake Jobs
  • Fuel system rebuild
  • Belts and hardware
  • Diagnosis and troubleshooting
  • Fluid leaks

Forklift TypesField-Service-Welding: LPG, Electric, Gas, Diesel, Scissor Lifts, Boom Trucks

Major Brands We Repair: TCM, White, Raymond, Komatsu, Toyota, Hyster, Yale, Crown, Nissan, Mitsubishi, Caterpillar, Baker/Linde, Clark, Daewoo, Taylor, Princeton Teledyne, Tennant, Tailift and more.