The National Crane 400B Operator and Service Manual PDF (OEM ID 038-07) takes your 400B crane from warm-up and boom cable tensioning all the way to mounting on a truck frame, in 214 pages. Service work fills the biggest share of the book: wiring diagrams sit beside trouble diagnosis and procedures for the anti-two-block internal wire system, extend cylinder, rotation gearbox and jib load limiting device. Daily, weekly and monthly inspections, a lubrication chart, and installation guidance on PTO selection, counterweighting and stability checks round it out. Set anti-two-block wire tension at 15-25 lb (6-11 kg), and bring M8x1 Grade 8.8 fine-thread fasteners to 27-29 Nm. Guessing wrong costs you a cable and a second teardown. Bookmarked and text-searchable, this PDF helps you get the 400B lifting again.
What's Inside This National Crane 400B Operator Manual
| System | Pages | Key Topics |
|---|
| Boom Cable Tensioning Supplement | 1-12 | Tensioning Setup Procedure, Cable Tightening Sequence, Cable Balancing, Extend Cables, Retract Cables |
| Crane Warm-Up Procedures Supplement | 13-16 | Engine, Transmission, Hoist, Swing Drive and Turntable Bearing, Axles, Hydraulic Oil System |
| National Crane 400B Operator and Service Manual | 17-50 | |
| Safety Information | 51-82 | Operational Aids, Crane Stability, Electrocution Hazard, Personnel Handling, Environmental Protection, Overload Inspection |
| Operation | 83-106 | Truck Cab Controls, Hoist System Operation, Anti-Two Block System, Hydraulic Capacity Alert System, Jib Load Limiting Device |
| Maintenance | 107-114 | Daily Inspections, Weekly Inspections, Monthly Inspections, Periodic Inspection, Wire Rope Inspection, Tire Load and Inflation |
| Lubrication | 115-124 | Lubricants, Hydraulic Oil, Lubrication Points, Wire Rope Lubrication, Lubrication Chart, Carwell Rust Inhibitor |
| Service | 125-174 | Cleanliness, Trouble Diagnosis, Anti-Two-Block Internal Wire System, Extend Cylinder, Rotation Gearbox, Jib Load Limiting Device |
| Specifications | 175-178 | Hydraulic System, Hoist System, Crane Operating Speeds, Center of Gravity, Load Moment |
| Crane Installation | 179-214 | Mounting Configurations, Truck Frame Strength, PTO Selection, Counterweighting, Stability Check, Outrigger Installation |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Metric Fasteners, Fine Thread, Untreated (M8x1, Grade 8.8) | 27-29 Nm | p. 31 |
| Weld Stud Torque Values (#10) | 20 lb-in | p. 32 |
| O-Ring Face Seal B dimension (897063) | 0.07 inches (1,78 mm) | p. 126 |
| O-Ring Face Seal A dimension (897063) | 0.301 inches (7,64 mm) | p. 126 |
| Anti-two-block wire tension | 15-25 lb (6-11 kg) | p. 135 |
| Anti-two-block wire spring extension | 2 in (50 mm) | p. 136 |
| Rotation Gearbox Weight | 96 lbs | p. 159 |
| Rotation Gearbox Brake Torque | 800 in. lbs. | p. 159 |
| Hydraulic System Filtration | 10 Micron Return | p. 177 |
| Standard Hoist Wire Rope | 205 ft of 1/2 in dia. | p. 177 |
| Optional Hoist Wire Rope | 220 ft of 9/16 in dia. | p. 177 |
| Burst of Speed Maximum Pull | 3000 lb | p. 178 |
