mossy's Diesel Maintenance
Our Services
Industries We Service:
Agricultural
Earthmoving
Mining
Civil Construction
Marine
Heavy Mobile Equipment Maintenance
Mossy’s Diesel Maintenance provides comprehensive maintenance solutions for heavy mobile equipment across Central Queensland and the Bowen Basin. We support fleets including Caterpillar, Volvo, Hitachi, Liebherr, John Deere, Kobelco and Komatsu equipment, delivering safe, reliable, and cost-effective maintenance aligned with site requirements and production targets.
Breakdown diagnosis and repair
Major component replacements and rebuilds
Preventative maintenance (PM servicing aligned to OEM schedules)
Shutdown and planned maintenance support
Reliability improvement and repeat failure reduction
Field Service & Breakdown Support
We specialise in rapid-response field service to minimise downtime and keep operations moving.
24/7 onsite breakdown response
Fully equipped service vehicles and tooling
Onsite diagnostics and repair capability
Remote and mine-site support across CQ and the Bowen Basin
Hydraulic Systems & Hydraulic Hose Replacement
Working in conjunction with MDM Hose & Hydraulics, we deliver a complete hydraulic solution.
Hydraulic diagnostics and fault finding
Hose manufacturing and on-site replacement
Cylinder resealing and rebuilds
Pump and component replacement
Hydraulic system modifications and upgrades (where required)
Grease system repairs and maintenance
Electronic Diagnostics & OEM Support
We provide advanced diagnostic capability across major OEM platforms.
Fault finding and troubleshooting
Complex diagnostics and system analysis
Support for:
Major component issues
Warranty-related work
Software updates and programming
Component Rebuilds & Major Repairs
We support both onsite and workshop-based component work.
Engine, transmission, and final drive replacements
Hydraulic component rebuilds
Planned major maintenance
Shutdown support and coordination
All work completed in line with OEM specifications and site standards
Preventative Maintenance & Asset Management
We don’t just fix machines — we help manage them.
PM schedule development and execution
Maintenance planning support
CMMS work order completion and reporting
Asset condition monitoring
Failure tracking and improvement strategies
Maintenance Contracts & Labour Supply
Mossy’s Diesel Maintenance is equipped to deliver structured maintenance contracts and workforce solutions.
Full onsite maintenance contracts (time & materials or hybrid models)
Supervisors, leading hands, and trades personnel
Flexible resourcing based on fleet size and utilisation
Capability to scale workforce across multiple sites
We supply skilled, “A-grade” diesel fitters across: Central Queensland and Bowen Basin mining operations
Workforce Capability & Safety
We pride ourselves on delivering high-quality personnel and safe outcomes.
Experienced, vetted tradespeople
Strong safety culture aligned with WHS and site requirements
Supervisors, leading hands, and trades personnel
All personnel equipped with mine site compliant work utes, tools and PPE
Focus on quality workmanship and minimal rework
Local Presence, Regional Capability
Based in Yeppoon, Mossy’s Diesel Maintenance is a locally owned and operated business with strong regional knowledge.
Experienced, vetted tradespeople
Supervisors, leading hands, and trades personnel
Focus on quality workmanship and minimal rework
Value-Added Services
Hydraulic component supply at competitive rates
Hose trailer and on-site manufacturing capability
Training and knowledge transfer for client teams
Maintenance system and compliance support
Client Feedback
Trusted by Operators
Across Central Queensland
Your whole team have always been prompt, professional and so easy to deal with. Love having your team onboard.
Scott Poppi
Maintenance Supervisor
Keep Your Equipment Moving
COntact us
Breakdown? Get Fast Hydraulic Support
Keep your machinery moving with reliable hydraulic hose repairs, cylinder repairs, onsite services, and quality components across Central Queensland.
Agricultural
Earthmoving
Mining
Civil Construction
Marine