Product line:
DD-series tandem vibratory asphalt compactors
Models covered:
DD24, DD30, DD28HF, DD34HF
Model variants:
Standard DD24 and DD30; high-frequency DD28HF and DD34HF
Machine type:
Double-drum (tandem) vibratory roller / compactor
Primary application:
Asphalt paving and granular base compaction
Production years covered:
N/A - not specified for this manual; refer to the manual for model-year applicability
Manual type:
Professional service and repair manual
Target audience:
Professional asphalt paving contractors and road maintenance crews
Secondary audience:
Compaction fleet owners and rental fleet operators
Intended users of this manual:
Technicians, mechanics, and DIY owners
Machine class:
Compact to mid-size tandem vibratory rollers
Drum design:
High-frequency (HF) models suit thin-lift and high-speed asphalt work
Serviceability:
Factory-level repair, diagnostic and specification data in one document
Diagnostics:
Symptom-based troubleshooting with flowcharts reduces repair guesswork
Compaction system:
Twin vibrating steel drums with selectable amplitude or frequency on HF models
Operating position:
Operator platform with dual-side or offset control console
Water system:
Pressurized drum spray bars with on-board water tank
Documentation:
Searchable PDF with bookmarked chapters
Coverage areas:
General information, safety, maintenance, engine, transmission and drivetrain, electrical, brakes, suspension and steering, cooling and heating, fuel system, diagnostics
Model coverage:
DD24, DD30, DD28HF and DD34HF vibratory compactors
Applicability note:
All models, engine variants and trim levels covered; check the manual for specific model-year applicability
Page count:
N/A - not stated for this edition
Manual type:
Professional service repair manual (factory-level procedures and specifications)
File format:
Searchable PDF - zoomable, printable, bookmarked
Delivery method:
Instant digital download - no shipping, no waiting
Binding:
Digital (no physical binding)
Re-download:
Download again anytime after purchase
Platforms:
Windows PC, Mac, tablets and smartphones
Searchability:
Text-searchable across the full document
General information:
Machine identification, component location and standard shop practice
Safety warnings:
Handling, lifting, jacking and high-pressure system precautions
Maintenance schedules:
Periodic service intervals and inspection checklists
Engine:
Complete overhaul - disassembly, inspection and rebuild
Transmission and drivetrain:
Service procedures for drive components and final drives
Electrical system:
Diagnostics and repair, including starting and charging circuits
Brake system:
Inspection and service procedures
Suspension and steering:
Articulation joint and steering component service
Cooling and heating:
Cooling system and operator heating service
Fuel system:
Maintenance and repair procedures
Vibration system:
Drum exciter, amplitude and frequency control service
Water spray system:
Pump, spray bar, filter and nozzle service
Disassembly and assembly:
Step-by-step procedures with component identification
Component function verification:
Tests to confirm correct operation before reassembly
Wear limit inspections:
Allowable tolerances for all wear components
Torque specifications:
Factory tightening torque for all fasteners
Special tools:
Special service tool numbers with illustrations
Diagnostics and Reference
Troubleshooting:
Symptom-based troubleshooting with diagnostic flowcharts and trees
Electrical testing:
Multimeter test procedures and wiring schematics
Wiring diagrams:
Detailed electrical schematics by circuit
Exploded-view diagrams:
Parts diagrams with OEM part numbers
Parts information:
OEM part numbers and component location guides
Specifications:
Factory specifications, tolerances and wear limits
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine type:
Refer to the manual for detailed specifications
Engine options range:
N/A - engine variants vary by model; see the manual for the unit fitted
Displacement:
Refer to the manual for detailed specifications
Performance and Fuel System
Performance data:
Refer to the manual for rated output and governed speed
Fuel system:
Diesel injection system - service and repair procedures included
Fuel filtration:
Water separator and fuel filter service intervals in maintenance schedule
Air intake:
Filter and intake service covered in maintenance section
Standard transmission:
Hydrostatic drive to both drums
Optional transmission:
N/A - no optional transmission listed for these models
Drive configuration:
Tandem drum drive
Speed control:
Infinitely variable forward and reverse via hydrostatic pump and motors
Direction change:
Smooth hydrostatic reversal for finish rolling
Traction control:
Drum drive balancing on HF models per manual
Service content:
Transmission and drivetrain service procedures with torque specifications
Diagnostics:
Hydrostatic system pressure testing and troubleshooting flowcharts
Wheelbase:
N/A - wheelbase not applicable to a tandem drum roller; drum centers given in the manual
Length:
Varies by model - refer to the manual for dimensions
Drum width:
Model-specific - refer to the manual for dimensions
Overall width:
Model-specific - refer to the manual for dimensions
Height:
Model-specific - refer to the manual for dimensions, including ROPS
Operating weight:
Model-specific - refer to the manual for operating and shipping weights
Curb weight:
N/A - operating weight applies to this machine class; see the manual
Weight distribution:
Static and dynamic drum loads given in the manual
Ballast options:
N/A - see the manual for the specific model
Crash test information:
N/A - not applicable to off-highway construction machinery
Applicable standards:
Machine conforms to applicable construction equipment safety standards; see the manual
Visibility:
Operator sight lines to drum edges and spray bars
Alarms:
Travel and reverse alarm provisions per machine configuration
Emergency stop:
Engine shutdown and parking brake controls
ROPS structure:
Roll-over protective structure frame with seat belt
Access:
Non-slip steps, handholds and platform railings
Guarding:
Drive, engine and articulation guards
Brakes:
Spring-applied, hydraulically released parking brake
Infotainment and Controls
Audio system:
N/A - no factory audio system on this machine class
Instrument panel:
Gauges and warning lamps for engine, hydraulic and water systems
Control layout:
Dual-direction control lever with vibration and spray switches
Machine monitoring:
Warning indicators and shutdown protection for engine and hydraulics
Vibration control:
Selectable drum vibration at the operator station
Water spray control:
Operator-controlled spray system for drum cleaning
Diagnostic access:
Electrical test points documented with multimeter procedures
Interval source:
Factory maintenance schedule in this manual
Daily checks:
Engine oil level, coolant, fuel, water tank, spray nozzles and leaks
Typical run-in service:
Engine oil and filter change after the initial break-in period per schedule
Periodic services:
Engine oil and filters, hydraulic oil and filters, fuel filters, air filter, drum spray filters
Fluid types:
Refer to the manual for factory-approved engine oil, hydraulic oil, coolant and grease
Capacities:
Model-specific fill capacities listed in the manual
Grease points:
Articulation, steering and drum bearing greasing schedule in the manual
Known Issues and Wear Items
Drum spray nozzles:
Clogging and water coverage loss - cleaned in daily maintenance
Drum scrapers:
Contact wear - checked and adjusted to keep drums clean
Drum bearings:
Wear inspection with allowable tolerances in the manual
Vibration isolators:
Degradation and cracking - inspected per schedule
Troubleshooting:
Symptom-based fault charts for common hydraulic and electrical complaints
Manufacturer:
Ingersoll Rand
Lineage:
Road construction and compaction equipment division, later part of the Volvo Construction Equipment compaction range
Machine series:
DD-series double-drum vibratory asphalt compactors
Model Evolution and Production
Model evolution:
Standard DD24 and DD30 followed by high-frequency DD28HF and DD34HF variants for faster asphalt rolling
Model designation:
DD = double drum; HF = high frequency vibration
Production location:
N/A - not specified for this model range
Year coverage:
N/A - not specified; see the manual for model-year applicability
Awards for the model or era:
N/A - not specified for this model range
Customer recognition:
Widely used in paving fleets for dependable asphalt compaction
Manual recognition:
Factory-level service data compiled for professional repair and diagnostic work