Link Belt HC-278H II Crane Service Pdf Manual
Link-Belt HC-278H II Crane Service PDF Manual
The Link-Belt HC-278H II is a 300 U.S. ton (272 metric ton) HYLAB conventional lattice boom truck crane built for large-scale lifting operations where maximum capacity, long boom configurations and dependable hydraulic performance are essential. Featuring a six-axle carrier, tubular boom system, five-piece upper counterweight and optional luffing attachment, the HC-278H II is commonly used for bridge construction, petrochemical plants, power generation projects and heavy steel erection. This OEM Factory Service PDF Manual provides detailed workshop procedures for diagnosing, repairing and rebuilding major crane systems according to original Link-Belt service standards.
Designed for Complete Workshop Repairs
This factory service manual is intended for professional technicians performing complete component rebuilding rather than routine servicing. It explains how to overhaul the rubber tire lower carrier, rebuild hydraulic and mechanical systems, restore planetary hoists, repair swing assemblies and troubleshoot electrical circuits. Every procedure follows the original Link-Belt workshop sequence, helping maintenance teams return the crane to reliable operating condition after major repairs.
Machine Information
| Specification | Details |
|---|---|
| Manufacturer | Link-Belt Cranes |
| Model | HC-278H II |
| Machine Type | HYLAB Conventional Lattice Boom Truck Crane |
| Maximum Rated Capacity | 300 U.S. Tons (272 Metric Tons) |
| Carrier Configuration | Heavy-Duty Six-Axle Rubber Tire Carrier |
| Main Boom Length | 60 ft to 330 ft Tubular Boom |
| Maximum Tip Height | 403.8 ft (123.1 m) |
| Optional Attachment | Luffing Jib Configuration Available |
| Counterweight System | Five-Piece Upper Counterweight |
| Applications | Bridge Construction, Heavy Industrial Plants, Refineries, Wind Energy and Infrastructure Projects |
Factory Workshop Coverage
- General information, safety instructions and complete OEM repair procedures.
- Rubber tire lower carrier overhaul including steering, suspension, axles and driveline components.
- Front and rear brake system diagnostics, adjustment and rebuilding.
- Transmission, auxiliary transmission, clutch and power take-off servicing.
- Hydraulic outriggers, telescoping beams, jack cylinders and outrigger control valves.
- Upper revolving frame inspection, counterweight system servicing and swing lock adjustments.
- Planetary hoists, boom hoist drives, front and rear drum assemblies and optional third drum overhaul.
- Swing mechanism, rotating joint, turntable bearing inspection and swing brake servicing.
- Hydraulic pumps, accumulators, pressure testing, relief valves, filters and hydraulic control valves.
- Boom foot pin assemblies, live mast components, tubular boom sections, fly and optional luffing attachment repairs.
- Factory electrical wiring diagrams, charging system diagnostics and electrical troubleshooting.
- Inspection limits, tightening torque values, wear measurements and final assembly procedures.
Manual Specifications
| Manual Section | Coverage |
|---|---|
| Lower Carrier | Steering, Suspension, Brakes, Transmission & Outriggers |
| Upper Structure | Swing System, Counterweight & Revolving Frame |
| Mechanical Components | Planetary Hoists, Drum Assemblies & Boom Hoist |
| Hydraulic System | Pumps, Valves, Cylinders & Hydraulic Diagnostics |
| Electrical System | OEM Wiring Diagrams & Troubleshooting |
| Boom Equipment | Main Boom, Fly, Luffing Attachment & Live Mast |
| Document Format | Searchable PDF |
| Language | English |
| Delivery | Instant Digital Download |
Why This OEM Manual Is Essential
The HC-278H II combines high-capacity lifting equipment with advanced hydraulic, structural and drivetrain systems that require accurate factory repair methods. This OEM manual enables technicians to rebuild planetary hoists, restore hydraulic systems, repair swing mechanisms, overhaul the lower carrier and troubleshoot electrical circuits using original Link-Belt service procedures. It is an indispensable reference for crane fleet maintenance departments, heavy equipment workshops and professional rebuild specialists.
Frequently Asked Questions
Does this manual cover both the lower carrier and upper crane?
Yes. It includes factory repair procedures for the lower carrier, upper revolving structure, hydraulic systems, drivetrain and crane mechanisms.
Are hydraulic outriggers and hydraulic troubleshooting procedures included?
Yes. The manual covers hydraulic pumps, valves, accumulators, cylinders, pressure testing, outrigger systems and complete hydraulic diagnostics.
Does it include planetary hoists and swing mechanism repairs?
Yes. Detailed overhaul procedures are provided for planetary hoists, boom hoist assemblies, swing drives, turntable bearings and related mechanical components.
Are factory electrical wiring diagrams included?
Yes. OEM electrical wiring diagrams and troubleshooting procedures are included for the crane's electrical systems.
Who should use this service manual?
This manual is intended for heavy equipment workshops, crane fleet maintenance departments, rental companies, rebuild specialists and experienced technicians servicing the Link-Belt HC-278H II crane.