Brands We Support
Service for Top Heavy Equipment Brands
OnSite Diesel services most major heavy equipment brands, including Caterpillar, Komatsu, Volvo, and John Deere, with mobile field repairs, full in-shop capability for major work, and parts support to reduce downtime. Expect fast diagnostics, durable fixes, and maintenance that protects uptime in harsh operating conditions.
Based in Willis, TX, we serve customers across Texas within a 250-mile radius of Houston.
Brands We Work With
We offer a full range of services to support your equipment, from routine maintenance to complex repairs, helping minimize downtime and keep your operations running.
Caterpillar equipment support for high-hour production work
- Hydraulic leaks and performance loss
- Cooling issues and overheating under load
- Pin/bushing wear and bore correction
Komatsu equipment support for abrasive, high-cycle jobsites
- Hydraulic contamination and component failures
- Undercarriage wear and wear-point issues
- Cracks, fatigue, and attachment damage
Volvo equipment support when production can’t slow down
- Hydraulic issues affecting cycle time
- Wear at attachment points and joints
- Structural cracks in high-stress areas
John Deere equipment support across crews, shifts, and jobsites
- Hose failures and hydraulic leaks
- Joint wear and looseness at pins/bushings
- Structural fatigue and attachment repairs
Kobelco equipment support for tough digging and uptime
- Hydraulic leaks and hose failures
- Undercarriage wear and track tension issues
- Cooling issues and overheating under load
JLG equipment support for safe, reliable lift performance
- Hydraulic leaks and hose chafing
- Electrical faults and charging/battery issues
- Structural wear, cracks, and platform damage
Hitachi equipment support for harsh sites and high hours
- Undercarriage wear and material buildup
- Track tension issues and de-tracking risk
- Hydraulic leaks and performance loss
Develon equipment support for heavy use and production
- Hydraulic contamination and component wear
- Hose, seal, and cylinder leaks
- Cooling issues and overheating under load
How We Keep Your Fleet Moving
Not every repair can wait, and not every repair belongs in the field. OnSite Diesel offers both, supporting the equipment behind the Texas industries we serve.
Our mobile field service trucks arrive on-site ready to diagnose issues, restore hydraulics, repair diesel engine systems, perform welding, and complete precision line boring. When a repair requires controlled conditions, specialized tooling, machining work, or a major component rebuild, our full-service shop is equipped to handle complex work efficiently.
This hybrid approach supports uptime while ensuring repairs are done right, whether your machine is down at the jobsite or needs deeper work in the shop.
Get Your Equipment Back to Work
If you run heavy equipment from Caterpillar, Komatsu, Volvo, John Deere, or most other major brands, OnSite Diesel is ready to help. Our mobile field service and full-service shop in Willis, TX support customers across Texas within a 250-mile radius of Houston.