Part of the New Holland Repair Manuals.
An hour from now you could be cracking a head cap loose on a leaking boom cylinder, this 135-page New Holland LB-620 service manual PDF (OEM ID 40062010) propped open beside the loader backhoe. Coverage runs from brakes and cylinders through the transfer gearbox, hydrostatic pump and motor, steering motor, and gear pump. Wiring diagrams trace the alternator and starter circuits, hydraulic schematics map oil flow through the Kontac and Gresen valve stacks, and exploded views back up every cylinder rebuild. Set brake pad to disc clearance at 0.015 to 0.035 in., check master cylinder pedal free play, then pull the bucket cylinder piston nut to 320 ft. lbs. (434 N·m). Every hour this backhoe sits is work you can't bill. Pay once, download the bookmarked, keyword-searchable file, and it stays yours for as long as you own the machine.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 4 | Personal Safety, Machine Safety, Precautionary Statements, Safety Decals |
| Brakes | 5-12 | Parking Brake, Foot Brake |
| Cylinders | 13-38 | Backhoe Bucket Cylinder, Boom Cylinder, Crowd or Dipper Cylinder, Swing Cylinder |
| Electrical System | 39-46 | Alternator, Starter |
| Engines | 47-48 | Diesel Fuel, Crankshaft Rotation, Governor, Valve Clearance, Oil Filter, Crankcase Capacity |
| Final Drives | 49-50 | Limited Slip Differential, Axle Assemblies, Drive Shafts, Wheel Hub, Bearings, Universal Bearings |
| Transfer Gearbox | 51-58 | Gearbox Cover, Shifter Fork Shaft, Output Shaft, Intermediate Shaft, Bearing Caps, Oil Seals |
| Hydraulic System | 59-68 | Hydraulic Oil Flow, Troubleshooting |
| Hydrostatic Pump and Motor | 69-84 | Hydrostatic System Repair, Hydrostatic Pump Disassembly, Hydrostatic Motor Disassembly |
| Steering Motor | 85-96 | Removing the Steering Motor, Servicing Power Steering Unit |
| Hydraulic Pump | 97-102 | Gear Pump, Back Plate Assembly, Adaptor Plate, Shaft and Gear Assembly, Roller Gear Assembly, Diaphragm Seals |
| Valves | 103-128 | Backhoe Valve Stack, Kontac Valve, Gresen Valve |
| Adjustments | 129-132 | Loader Valve Control Cables, Parking Brake, Foot Brake, Back-Up Alarm, Neutral Safety Switch, Hydrostatic Neutral Adjustments |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Brake caliper bolts torque | 53 ft. lbs. (71 N·m) | p. 5 |
| Brake pad to disc clearance | 0.015"-0.035" (0.38 mm-0.89 mm) | p. 6 |
| Master cylinder pedal free play | 3/4"-1" (19 mm-25 mm) | p. 6 |
| Piston nut torque (Bucket cylinder) | 320 ft. lbs. (434 N·m) | p. 16 |
| Head cap torque (Bucket cylinder) | 25 ft. lbs. (34 N·m) | p. 16 |
| Steering (Cessna) Piston Nut Torque | 70-80 ft. lbs. | p. 61 |
| Charge pressure | 100 PSI (689 kPa) | p. 84 |
| High pressure relief valve setting | 4500 PSI (31,027 kPa) | p. 84 |
| Parking Brake Bolt Torque | 53 ft. lbs. (71 N·m) | p. 5 |
| Bucket Cylinder Piston Nut Torque | 320 ft. lbs. (434 N·m) | p. 16 |
| Boom Cylinder Head Cap Torque | 25 ft. lbs. (34 N·m) | p. 19 |
| Engine Oil Capacity | 6 qts. (5.7 L) | p. 47 |
