Part of the New Holland Repair Manuals.
This 117-page New Holland Construction Service Manual covers the L-225, L-325, L-425, and L-445 Skid-Steer Loader lineup, and it's built for the guy actually turning wrenches on the hydrostatic drive. Inside you get full electrical wiring diagrams, hydraulic circuit schematics for the pump and motor assemblies, exploded views for the final drive teardown, and a dedicated troubleshooting section covering creeping loaders, slow boom lift, and bucket tilt complaints. The specs section breaks out engine and fluid data by model, so you're not guessing which capacity applies to your machine. Torque the hydrostatic motor case bolts to 15-18 ft. lbs. (20-24 N-m), and fill the chain case reservoir to 16 gallons (57.1L) before you button it back up. Stop tearing into a hydrostatic pump blind. This PDF carries bookmarks straight to any system, so you can jump from steering adjustments to torque charts without flipping pages, right from your phone in the shop.
What's Inside This New Holland L-225, L-325, L-425, L-445 Manual
| System | Pages | Key Topics |
|---|---|---|
| Skid-Steer Loader Operation | 7-9 | Hydraulic Circuit, Oil Flow, Hydrostatic Drive, Machine Deceleration |
| Hydrostatic Transmission Removal | 10-19 | Belly Pan Removal, Chain Coupler, Drive Shaft, Hydraulic Line Disconnection, Hydrostatic Motor Removal |
| Hydrostatic Transmission Pumps | 20-29 | Pump Disassembly, Relief Valve Identification, Parts Inspection, Piston Block Assembly, Pump Reassembly |
| Hydrostatic Motors | 30-34 | Motor Disassembly, Piston Block Removal, Parts Inspection, Needle Bearings, Motor Reassembly |
| Gear Pump | 35-39 | Gear Pump Removal, Gear Pump Assembly, Parts Inspection, Gear Assembly, Reassembly of Gear Pump |
| Start-Up Procedure After Transmission or Pump Overhaul | 40-42 | Torque Values, Control Linkage Adjustment, Hydraulic Filter Replacement, Reservoir Filling, Charge Pump Operation |
| Steering Control Adjustments | 43-47 | Neutralizer Adjustment, Control Arm Stop Bolts, Drive Control Adjustment, Neutralizer Assembly Repair |
| Chain Coupler or Drive Shaft Removal and Installation | 48-52 | Chain Coupler Inspection, Drive Shaft Inspection, Engine Crankshaft Length, Coupler Alignment |
| Control Valve | 53-55 | Main System Relief Valve, Lift Check Valves, Spools and O-Rings, Control Valve Removal, Pressure Checking |
| Boom and Bucket Cylinders | 56-60 | Single Acting Cylinder Disassembly, Double Acting Cylinder Disassembly, Piston Nut Torque, Inspection, Reassembly |
| Final Drive: Complete Disassembly and Reassembly | 61-83 | Loader Blocking, Belly Pan Removal, Axle Removal, Chain Idler Assembly, Parking Brake Phasing |
| Electrical System | 84-88 | Alternator Test, Isolation Diode, Field Circuit Check, Alternator Field Draw Test, Regulator Removal |
| Trouble Shooting | 89-95 | Small Frame Loader Issues, Transmission Problems, Loader Creeps, Boom Raises Slowly, Bucket Tilt Issues |
| Specifications | 102-105 | Engine Specs, Fluid Capacities, Hydraulic System, Transmission, Travel Speeds, Tire Sizes |
| Torque Data & Tightening Torques | 114-116 | Hydraulic Tubes and Fittings, Bolt Torque Chart, Minimum Hardware Tightening Torques |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Seat Activated Boom Lockout Switch Clearance | 1/16” | p. 99 |
| Hydrostatic Motor - Case Bolts Torque | 15-18 ft. lbs. (20-24 N·m) | p. 116 |
| Chain Case Reservoir Capacity | 16 gal. (57.1 l) | p. 105 |
| Transmission Charge Pressure Setting | 90-150 psi (6.8-10.2 bar) | p. 40 |
| Transmission Charge Pressure Warning Light Setting | 50 psi (3.4 bar) | p. 102 |
| Alternator Capacity | 30 amp | p. 103 |
| Light Circuit Protection | Fuse 20 amp | p. 104 |
| Tire Inflation (27 x 8.50 x 15) | 40 psi (3.2 kg/cm²) | p. 102 |
| L-445 | ||
| Boom Cylinder Bearing Nut Torque | 100-125 ft. lbs. (135-168 N·m) | p. 59 |
| L-225 | ||
| Hydraulic Lifting Capacity, L-225 | 900 lbs. (407 kg) | p. 102 |
| L-425 | ||
| Hydraulic Lifting Capacity, L-425 | 1000 lbs. (453 kg) | p. 104 |
| L-425 Engine Horsepower | 30 @ 2800 RPM | p. 104 |
