2,500+
Total Task Items
99.2%
Compliance Rate
45min
Average PM Time
100%
DOT Compliant
Severe Duty Task Lists by DOT Vehicle Classification
Select your vehicle class to access detailed maintenance task lists optimized for severe duty operations
Class 3 Vehicles
10,001 - 14,000 lbs GVWR
Heavy pickups, walk-in vans, box trucks
- 125 inspection points
- 45 severe duty tasks
- 250hr PM intervals
Class 4 Vehicles
14,001 - 16,000 lbs GVWR
City delivery, large box trucks
- 145 inspection points
- 52 severe duty tasks
- 250hr PM intervals
Class 5 Vehicles
16,001 - 19,500 lbs GVWR
Large walk-ins, bucket trucks
- 165 inspection points
- 58 severe duty tasks
- 200hr PM intervals
Class 6 Vehicles
19,501 - 26,000 lbs GVWR
Single axle, beverage trucks
- 185 inspection points
- 65 severe duty tasks
- 200hr PM intervals
Class 7 Vehicles
26,001 - 33,000 lbs GVWR
City buses, large trucks
- 210 inspection points
- 75 severe duty tasks
- 150hr PM intervals
Class 8 Vehicles
33,001+ lbs GVWR
Semis, dump trucks, cement
- 250 inspection points
- 95 severe duty tasks
- 150hr PM intervals
Off-Road Equipment
Mining & Construction
Loaders, dozers, excavators
- 300 inspection points
- 120 severe duty tasks
- 100hr PM intervals
Specialized Units
Custom Applications
Cranes, pumpers, mixers
- 275 inspection points
- 110 severe duty tasks
- 125hr PM intervals
Class 8 Severe Duty Task List
Complete maintenance checklist for Class 8 vehicles operating in severe conditions
Daily Pre-Trip Tasks (15 items)
- Check engine oil level and condition
- Inspect air filter restriction gauge
- Test all lights and signals
- Check tire pressure and condition
- Inspect brake adjustment indicators
- Drain air tanks and check pressure
- Verify coolant level and condition
- Check hydraulic fluid levels
- Test horn and backup alarm
- Inspect fifth wheel and kingpin
250-Hour PM Tasks (35 items)
- Change engine oil and all filters
- Replace air filter elements
- Service fuel/water separator
- Grease all chassis points (45 locations)
- Adjust all brake slack adjusters
- Torque wheel lug nuts to spec
- Clean radiator and CAC cores
- Inspect exhaust system and DPF
- Check transmission fluid level
- Test battery load and connections
500-Hour PM Tasks (25 items)
- Replace transmission filter
- Change differential fluids
- Service power steering system
- Replace coolant filter
- Inspect drive shafts and U-joints
- Check clutch adjustment
- Test A/C system performance
- Calibrate engine ECM parameters
1000-Hour PM Tasks (20 items)
- Valve adjustment and overhead set
- Replace all belts and hoses
- Flush cooling system
- Clean DPF filter
- Rebuild air dryer
- Replace brake chambers
- Service turbocharger
- Inspect frame and crossmembers
Customizing Task Lists for Your Operation
Adapt standard task lists to match your specific severe duty requirements
Baseline Assessment
Document current failure modes, operating conditions, and maintenance history for each vehicle class
Task Prioritization
Rank tasks by criticality, add application-specific items, remove non-applicable standard tasks
Time Standards
Establish labor time standards for each task to optimize scheduling and staffing
Digital Integration
Import task lists into CMMS, enable mobile access, track completion rates
Task List Implementation Benefits
Inspection Completeness
PM Cycle Time Reduction
Technician Efficiency
Defect Detection Rate
Task List Compliance & Documentation
Ensure regulatory compliance and maintain comprehensive maintenance records
DOT Requirements
Meet all federal inspection mandates with comprehensive task coverage.
- Annual inspection items
- Brake adjustment records
- Driver vehicle reports
- 90-day inspection cycle
Digital Records
Electronic documentation for instant access and audit readiness.
- Cloud-based storage
- Photo attachments
- Digital signatures
- Auto-generated reports
Performance Tracking
Monitor completion rates and identify improvement opportunities.
- Task completion metrics
- Defect trending analysis
- Tech productivity KPIs
- Cost per task tracking
Severe Duty Task Frequency Matrix
Recommended task intervals by vehicle class and operating severity
| Vehicle Class | Normal Duty | Severe Duty | Extreme Duty | Critical Tasks |
|---|---|---|---|---|
| Class 3-4 | 500 hrs | 250 hrs | 150 hrs | 45-52 items |
| Class 5-6 | 400 hrs | 200 hrs | 125 hrs | 58-65 items |
| Class 7-8 | 300 hrs | 150 hrs | 100 hrs | 75-95 items |
| Off-Road | 250 hrs | 100 hrs | 50 hrs | 120 items |
| Specialized | 300 hrs | 125 hrs | 75 hrs | 110 items |
Explore Our Core Maintenance Pillars
Access comprehensive maintenance resources for severe duty fleet operations.
Maintenance Hub
Explore our main hub for all heavy vehicle maintenance resources, guides, and best practices.
Maintenance Plans
Discover structured maintenance plans designed to optimize fleet performance and reduce operational costs.
Severe Duty Plans
Specialized maintenance strategies for equipment operating in the harshest conditions.
Frequently Asked Questions
Task lists vary significantly based on GVWR, complexity, and typical applications. Class 3-4 vehicles (10,001-16,000 lbs) have 125-145 inspection points focusing on basic systems. Class 5-6 (16,001-26,000 lbs) add 20-40 tasks for hydraulics and auxiliary equipment. Class 7-8 (26,001+ lbs) require 210-250 points including advanced emissions, air systems, and fifth wheels. Off-road equipment needs 300+ items covering undercarriage, hydraulics, and attachment-specific tasks. Each class also has different interval requirements based on component stress levels.
Critical tasks for severe duty include: daily air filter inspection (clogging causes 30% of engine failures), brake adjustment checks every 250 hours (required by DOT), hydraulic system inspections for contamination, cooling system cleaning (weekly in dusty conditions), and undercarriage/wear component measurements. Oil sampling every 250 hours is essential for early failure detection. Safety-critical items like steering, suspension, and coupling devices require inspection at every PM. Missing these tasks increases failure risk by 400% in severe conditions.
Start with classroom training on vehicle systems and task rationale (8 hours per class). Follow with hands-on demonstration of each task list item on actual equipment (16 hours). Pair new technicians with experienced mentors for 5-10 supervised PMs. Use digital checklists with photo requirements to ensure consistency. Implement competency testing for critical tasks before solo work authorization. Provide quick reference guides and mobile access to procedures. Regular refresher training (quarterly) maintains standards and introduces updated procedures.
All commercial vehicles (Class 3-8) require DOT annual inspection certificates, driver vehicle inspection reports (DVIR), and maintenance records for 1 year. Class 7-8 vehicles need additional brake adjustment records and 90-day inspection documentation. Severe duty operations should document: all PM completions with task checklists, defects found and corrected, parts replaced with serial numbers, oil analysis results, and downtime causes. Electronic recordkeeping with photo documentation is recommended for audit compliance and warranty claims.
Review task lists quarterly using failure data and technician feedback. Major updates typically occur annually based on: OEM service bulletin changes, regulatory updates, failure trend analysis, and operational changes. Severe duty conditions may require monthly adjustments during seasonal changes (dust season, winter operations). Track task effectiveness through KPIs like repeat failures and missed defects. Add tasks immediately for safety-critical issues or recurring failures. Remove redundant tasks after 6 months of zero findings. Document all changes with revision dates and rationale.
Get Your Custom Severe Duty Task Lists
Download vehicle class-specific task lists optimized for your severe duty operation and achieve 99% PM compliance
All 8 vehicle classes included • Mobile-friendly format • Free implementation support