Part of the New Holland Repair Manuals.
Need the factory book for your New Holland L-781, L-784, or L-785? This 106-page service manual (OEM #40078130) covers all three skid-steer loaders with the same hydrostatic drive and boom hydraulics running through them. You get complete wiring diagrams for the alternator and seat-activated boom lockout circuit, hydraulic schematics for the piston pumps and control valve, and a full troubleshooting section when the machine won't move right or the boom won't hold. Set the hydrostatic pump-to-engine bolts to 27 ft-lbs, then torque the boom cylinder piston locknut to 155 ft-lbs before you button it back up. Your gear pump specs, final drive chain procedures, and steering adjustment steps are all here too, no aftermarket guesswork. Stop tearing into a hydrostatic transmission blind. Bookmarked by section so you can jump straight to the repair you're chasing instead of scrolling past 90 pages to find it.
What's Inside This New Holland L-781, L-784, L-785 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 4-6 | Personal Safety, Machine Safety, Safety Information, Caution, Warning, Danger |
| Operation | 7-10 | Hydrostatic Transmission, Boom Hydraulic System, Piston Pumps, Piston Motors, Gear Pump, Control Valve |
| Steering Adjustments | 11-16 | Drive Control Adjustment Procedure, External Stop Bolt Adjustment, Hi/Lo Range Adjustments, Labor Guide, Servo Cylinder Repair |
| Hydrostatic Transmission Removal | 17-24 | Hydrostatic Pump Removal, Hydrostatic Pump Installation, Hydrostatic Motor Removal, Hydrostatic Motor Reassembly, Specifications, Labor Guide |
| Transmission Pump Repair | 25-36 | Disassembly, Inspection of Parts, Labor Guide, Reassembly, System Cleaning Procedure After Transmission Overhaul |
| Hydrostatic Transmission Motors | 37-44 | Back Plate Bolts, Motor Housing, Rotating Piston Block, Piston and Shoe Assembly, Spherical Washer, Wave Washer, Motor Shaft, Cam Plate |
| Gear Pump | 45-48 | Drive Gear Shaft, Idler Gear Shaft, Back Plate, Front Plate, Body, Wear Plate |
| Bucket and Bloom Cylinders | 49-54 | Boom Cylinders, Bucket Cylinder, Piston, Cylinder Head, Spanner Nut, Piston Rod, O-Ring, Seal |
| Control Valve | 55-58 | Main System Relief Valve, Lift Check Valves, Spools and O Rings |
| Final Drive | 59-74 | Axle Bearings, Axle Installation, Axle Seal Replacement, Chain and Gear-Sprocket Drive Disassembly, Final Drive Chains, Idler Assembly |
| Electrical System | 75-78 | Alternator, Alternator Test, Excitation Voltage Test, Regulator Bypass Test |
| Seat Activated Boom Lockout | 79-82 | Seat Switch, Electronic Solenoid, Hydraulic Valve, Boom Lift Circuit |
| Troubleshooting | 83-86 | Hydraulic Mechanisms, Fuel Filter, Injectors, Ignition System, Neutralizing Spring Mechanism, Pintle Lever, Pintle Shaft, Steering Lever Stop Bolts |
| Specifications | 87-102 | Air Cleaner, Capacities, Engine, Engine Oils, Hydrostatic Transmissions, Hydraulic System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydrostatic pump to engine bolt torque | 27 ft. lbs. | p. 17 |
| Hydrostatic motor housing to final drive chain housing bolt torque | 66 ft. lbs. | p. 17 |
| Brake disc retaining bolt torque | 31 ft. lbs. | p. 17 |
| Gear pump displacement per revolution | 1.69 cu. in. | p. 45 |
| Boom Cylinders Piston locknut torque | 155 ft. lbs. | p. 49 |
| Bucket Cylinder Piston locknut torque | 120 ft. lbs. | p. 49 |
| Wheel lug bolts torque | 150 ft. lbs. | p. 59 |
| Fuel Tank Capacity | 20 ga. | p. 87 |
| Hydraulic Reservoir Capacity | 88 qts. | p. 87 |
| Standard Alternator Capacity | 37 amp | p. 87 |
| Hydrostatic Piston pump displacement | 2.48 cu. in. | p. 89 |
| Control Valve Setting | 2000 PSI | p. 90 |
