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Link Belt HT-400 Crane Service Pdf Manual
Link-Belt HT-400 Crane Service PDF Manual
The Link-Belt HT-400 was engineered for contractors who needed a truck-mounted crane capable of handling heavier lifts while maintaining highway mobility and dependable hydraulic performance. Rated at 40 U.S. tons, the HT-400 combines a rugged purpose-built carrier, a four-section hydraulic telescopic boom and a proven hydraulic lifting system for bridge construction, structural steel erection, industrial maintenance, petrochemical projects and heavy equipment installation. This OEM Factory Service PDF Manual provides the detailed factory procedures required to inspect, diagnose, overhaul and test every major crane system using manufacturer specifications.
About the Link-Belt HT-400
One of the defining features of the HT-400 is its combination of highway travel capability and jobsite productivity. The crane is equipped with a 33 to 96 ft four-section hydraulic power boom, an optional 21 ft boom extension, dual hydraulic hoists and a heavy-duty 8×4 carrier powered by a GM diesel engine. Its hydraulic boom design and compact transport configuration allowed contractors to move efficiently between projects without sacrificing lifting performance.
Machine Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Link-Belt Cranes |
| Model | HT-400 |
| Equipment Type | Hydraulic Truck Crane |
| Rated Capacity | 40 U.S. Tons |
| Main Boom | 33–96 ft Four-Section Hydraulic Boom |
| Boom Extension | Optional 21 ft Extension |
| Boom Construction | Heat-Treated High-Tensile Alloy Steel |
| Carrier | Purpose-Built 8×4 Truck Carrier |
| Engine | GM 6-71N Diesel |
| Engine Output | 238 HP |
| Transmission | Fuller RT0-9513 with 2-Speed Auxiliary |
| Forward Gears | 26 |
| Reverse Gears | 4 |
| Maximum Travel Speed | Approx. 46 mph (74 km/h) |
| Swing Rotation | 360° Continuous |
| Hoist System | Dual Hydraulic Wire Rope Drums |
| Wire Rope Capacity | Approx. 567 ft of 3/4 in Rope per Drum |
| Frame Construction | Welded Box Frame |
| Rear Axles | Planetary Reduction Tandem Axles |
| Typical Applications | Steel Erection, Industrial Construction, Utility Projects, Bridge Work and Heavy Equipment Installation |
Factory Workshop Coverage
- General workshop procedures and crane service information.
- Rubber tire lower carrier inspection and complete chassis repairs.
- Hydraulic system cleaning and contamination control procedures.
- Main hydraulic pump overhaul and performance testing.
- General solenoid valve rebuilding.
- Outrigger solenoid valve stack servicing.
- Outrigger lock valve inspection and repair.
- Rotating joint removal, installation and sealing procedures.
- Main hydraulic control valve rebuilding and calibration.
- Hydraulic pressure adjustment and flow testing.
- Swing drive diagnosis and swing reduction gearbox overhaul.
- Turntable bearing inspection and adjustment.
- Swing brake servicing and swing lock adjustments.
- Hydraulic hoist inspection, drum servicing and winch repairs.
- Boom removal and installation procedures.
- Four-section telescopic boom rebuilding.
- Boom extension cylinder overhaul.
- Boom hoist cylinder rebuilding.
- Boom holding valve servicing.
- Hydraulic hose routing and tube replacement.
- Upper and lower electrical system troubleshooting.
- Collector ring inspection and repair.
- Charging and starting system diagnostics.
- Factory torque specifications, inspection limits and operational testing.
Workshop Insight
The HT-400 was designed with rebuildable hydraulic and structural assemblies, allowing workshops to restore major components instead of replacing complete units. During scheduled overhauls, technicians commonly inspect the swing reduction gearbox, turntable bearing, boom extension cylinders, hydraulic pumps and hoist assemblies together because these systems work as an integrated lifting package. Following OEM inspection limits and adjustment procedures helps maintain lifting precision and long-term reliability.
Manual Technical Specifications
| Manual Section | Coverage |
|---|---|
| Document Type | OEM Factory Service Manual |
| General Information | Workshop Procedures, Safety and Service Instructions |
| Lower Carrier | Frame, Steering, Brakes, Transmission, Axles and Driveline |
| Hydraulic Systems | Main Pump, Control Valves, Solenoid Valves, Rotating Joint and Diagnostics |
| Boom Assembly | Four-Section Boom, Boom Cylinders, Holding Valves and Extension Mechanism |
| Upper Structure | Swing Drive, Turntable Bearing, Hoists and Structural Components |
| Outriggers | Solenoid Valve Stack, Lock Valves and Stabilizer Components |
| Electrical Systems | Upper & Lower Electrical Systems, Collector Ring and Troubleshooting |
| Technical Data | Torque Specifications, Inspection Limits and Adjustment Procedures |
| File Format | |
| Language | English |
| Delivery | Instant Digital Download |
Frequently Asked Questions
Does this manual include hydraulic troubleshooting?
Yes. It includes factory procedures for hydraulic pumps, solenoid valves, control valves, rotating joints, pressure testing and system diagnostics.
Are complete boom repair procedures included?
Yes. The manual covers boom removal, four-section boom rebuilding, boom extension cylinders, boom hoist cylinders and holding valves.
Does it include swing system repairs?
Yes. Factory overhaul procedures are provided for the swing reduction gearbox, turntable bearing, swing brake and related upper-structure components.
Are electrical wiring diagrams covered?
Yes. The manual includes upper and lower electrical troubleshooting together with OEM wiring information for accurate fault diagnosis.
Who is this manual intended for?
This service manual is designed for crane repair workshops, fleet maintenance departments, equipment rental companies, field service engineers and experienced technicians responsible for servicing the Link-Belt HT-400 hydraulic truck crane.