Off-Highway Drivetrain Services
What Are Off-Highway Drivetrain Services?
Off-highway drivetrain services from Hydro-Mechanical Systems cover the diagnosis, service, rebuild, testing, and parts support of off-highway drivetrain systems — transmissions, torque converters, and axle assemblies for heavy equipment. Furthermore, HMS holds ISO 9001:2015 certification and operates as an authorized Allison Off-Highway service center (formerly Dana Off-Highway).
Heavy equipment owners face costly downtime when major drivetrain components slip, overheat, or fail under load. Consequently, they need a service partner with the technical depth to rebuild and verify the unit before it goes back into the field. HMS supports customers by restoring drivetrain components to proper operating condition, supplying genuine OEM parts, and providing technical support to help minimize downtime and extend equipment life.
What Every Service Engagement at HMS Includes
- Full disassembly and inspection of every drivetrain component
- Replacement of worn gears, bearings, seals, and clutch components
- Cleaning, internal flushing, and reassembly to OEM standards
- Operational testing on the appropriate test stand before return to service
- Authorized Allison Off-Highway service procedures, formerly Dana Off-Highway
- Genuine OEM parts from Allison and Spicer supplier relationships
Why Is My Heavy Equipment Losing Power?
Power loss in heavy equipment usually traces to drivetrain components that no longer function properly. Furthermore, slipping transmissions, overheating, abnormal vibration, and loss of power all point to internal wear in gears, bearings, seals, or clutch components. Consequently, an accurate teardown inspection — not a parts swap — gives the first real path back to proper operating condition.
How Off-Highway Drivetrain Services Work at HMS
Off-highway drivetrain customers rarely have time for a slow process. Fortunately, HMS runs every job through five defined steps so the timeline and cost are clear from day one.
Step 1 — Base Overhaul Estimate. First, HMS issues a base overhaul estimate — the shop refers to this as a soft overhaul. Consequently, customers see the baseline cost of replacing bearings, seals, gaskets, clutch plates, and other normal wear components before any teardown begins.
Step 2 — Unit Inspection and Teardown. Next, once the component arrives at the Westville facility, technicians perform a full inspection and teardown to evaluate the condition of all internal components.
Step 3 — Additional Parts Evaluation. Then, technicians identify any damaged or worn components that fall outside the standard soft overhaul scope — items such as gears, shafts, hard components, or major internal assemblies.
Step 4 — Supplemental Quote and Customer Approval. If inspection identifies additional parts, HMS issues a supplemental quote. Consequently, HMS performs no additional work until the customer approves it.
Step 5 — Completion of Overhaul. Finally, technicians complete the rebuild and prepare the unit for final inspection and return to service.
Off-Highway Drivetrain Services HMS Provides
HMS supports customers across five core service capabilities, all running through the same documented inspection and quality control standards.
Off-Highway Transmission Service and Rebuild. First, HMS performs full disassembly, inspection, , and replacement of worn gears, bearings, seals, and clutch components. HMS operationally tests every transmission before it returns to service.
Torque Converter Inspection and Rebuild. Next, the team handles converter teardown, internal inspection, replacement of worn or damaged components, cleaning and internal flushing, seal replacement, reassembly, and functional testing where applicable.
Axle Service and Repair. HMS also services heavy-duty off-highway axle systems — differential and gear inspection, bearing replacement, seal replacement, gear setup and adjustment, and rebuild of axle assemblies that handle demanding operating environments.
OEM Parts Distribution. Furthermore, HMS maintains inventory and sourcing for genuine Allison Spicer off-highway powertrain components — transmission, torque converter, and axle parts, plus technical parts identification and support.
Specialized Industrial Applications. Finally, HMS continues to support specialized industrial applications that trace to the company’s founding work, including legacy systems tied to turbine starter assemblies and power generation equipment.
What the Industrial Downtime Data Shows
According to ABB’s Value of Reliability research, unplanned industrial downtime costs operators up to $500,000 per hour, and 44 percent of industry leaders experience equipment-related interruptions at least monthly. Furthermore, the same research shows that one in three businesses has not modernized motor-driven systems in more than two years. For off-highway equipment owners running aging fleets, that exposure makes qualified drivetrain service one of the highest-return maintenance investments available.
What Makes a Quality Drivetrain Rebuild?
A quality rebuild starts with full disassembly, inspection, and replacement of worn gears, bearings, seals, and clutch components. Furthermore, HMS reassembles every unit to manufacturer specifications and operationally tests it before return to service. genuine OEM parts separate a rebuild that lasts from a parts swap that fails again.
Inside the HMS Drivetrain Service Shop
HMS operates from a 20,000-square-foot facility at 1030 Delsea Drive, Building 8, in Westville, New Jersey. Furthermore, the shop runs transmission and torque converter test stands, hydraulic pump test stands, and an Industrial Typhoon Proceco parts washing system. Additionally, heavy-duty lifting and material handling equipment, precision measurement and inspection tools, and dedicated drivetrain rebuild workstations support every job on the floor.
That equipment matters because off-highway drivetrain services depend on tight inspection and verification. Consequently, HMS technicians clean every component, replace every worn bearing, and under structured inspection and quality control processes that meet ISO 9001:2015 — and HMS operationally tests every unit before it ships back to your equipment.
Why Choose HMS for Off-Highway Drivetrain Services?
HMS specializes in off-highway drivetrain systems and has done so since 1973. Consequently, technicians, sales staff and have spent their careers on these exact components — not on general repair work. Furthermore, ISO 9001:2015 certification through DNV-GL, authorized Allison Off-Highway service status, and staff back every rebuild that ships from Westville.
Frequently Asked Questions About Off-Highway Drivetrain Services
Off-highway transmission rebuild costs vary by model and condition. Furthermore, HMS provides a base overhaul estimate (soft overhaul) covering bearings, seals, gaskets, clutch plates, and other normal wear components before teardown. Additionally, if inspection finds damaged hard components — gears, shafts, or major internal assemblies — customers receive a supplemental quote and must approve the added work before HMS proceeds.
HMS provides a base overhaul estimate before teardown so customers see baseline rebuild cost up front. Furthermore, technicians perform a full inspection once the unit arrives and identify any additional damaged components. HMS performs no additional work until the customer approves it, which keeps communication transparent throughout the rebuild.
HMS operates as an authorized Allison Off-Highway service center (formerly Dana Off-Highway). Additionally, the team distributes genuine Allison and Spicer parts and has supported drivetrain components across heavy equipment from many off-highway OEMs — including JLG, Terex, Hyster, Manitowoc, Bombardier, Bucyrus-Erie, Grove, BOMAG, and P&H Crane — across more than 50 years.
Turnaround depends on parts availability, the depth of internal damage, and any supplemental components inspection turns up. Furthermore, HMS prioritizes accurate inspection and operational testing over rushed rebuilds. Consequently, customers receive a rebuilt unit that returns to service correctly the first time, with a clear scope in place before any teardown begins.
Yes. HMS specifically supports legacy and specialized equipment — many customers operate machinery that has run in the field for decades. Furthermore, the team maintains and rebuilds drivetrain components that other shops no longer support. Additionally, HMS helps customers continue operating critical equipment instead of replacing entire machines when components become hard to find.
Ready to Get Your Off-Highway Equipment Back to Work?
A proper off-highway drivetrain rebuild returns your equipment to service correctly the first time and keeps it running long after. HMS has handled that work for more than 50 years — and the shop signs every rebuild it ships.