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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 | 900 lbs. (407 kg) | p. 102 |
| L-425 | ||
| Hydraulic Lifting Capacity | 1000 lbs. (453 kg) | p. 104 |
| L-425 Engine Horsepower | 30 @ 2800 RPM | p. 104 |
New Holland L-225, L-325, L-425, L-445 Common Problems This Manual Covers
New Holland L-425 will drive and steer fine but boom and bucket won't move at all
Check the seat switch circuit first, page 99. Sit fully in the seat and push down on both corners of the cushion while a test light is wired in series with the switch leads; if the light stays dark, the 1/16" clearance between switch button and seat frame is closed up and the lockout thinks you're not seated. Adjust the bracket to restore that gap before chasing the valve or pump.
Manual Section: Seat Activated Boom Lockout (Style 2) p. 99Boom raises slowly or won't lift a loaded bucket at all
Pull the suction screen and check it for debris first; a plugged screen starves the pump and mimics a relief valve problem. Confirm engine is holding rated RPM, then check the main system relief setting on the control valve, pages 53-55. Inspect boom cylinders for bent shafts or internal piston leakage, and verify the boom arms aren't binding mechanically before condemning the pump.
Manual Section: Boom raises slowly or not at all p. 91Bucket creeps down or tilts forward on its own when parked overnight
Isolate whether the leak is internal or external. Check the tilt valve spool for wear or a bent control linkage, then inspect the cylinder for external seepage at the rod seals. If no external leak shows up, pull the cylinder per the disassembly procedure on page 56 and check the piston seals; a bad control valve spool can also let oil bypass internally under load.
Manual Section: Bucket and/or boom creeps down p. 92Loader creeps forward or backward with both control levers sitting in neutral
Check the neutralizing spring mechanism for a broken or fatigued spring, then verify the pintle lever isn't loose on its shaft. Inspect the pintle shaft itself for cracks; a broken shaft will let the pump swashplate drift off center even though the lever reads neutral at the handle. Adjust or replace per the steering control procedures starting on page 43.
Manual Section: Loader creeps with control levers in neutral position p. 91Charge pressure light stays on and hydrostatic drive feels weak or sluggish
Tap into the charge pressure test port and compare your reading against the 90-150 psi (6.8-10.2 bar) transmission charge pressure setting on page 40. If pressure sits near or below the 50 psi (3.4 bar) warning light threshold from page 102, check the charge pump for wear and inspect oil level and filter condition before adjusting the relief valve.
Manual Section: TRANSMISSION TROUBLE SHOOTING p. 93Alternator not charging or dash shows intermittent electrical dropout
Verify alternator output against its rated 30 amp capacity on page 103 with a clamp meter at idle and at 2000 RPM. Check the isolation diode and field circuit for continuity, then test field draw per the electrical system procedures. Inspect ground wires at the seat switch and dash connectors too, since corroded grounds in this circuit commonly mimic a bad alternator.
Manual Section: Electrical System p. 84Frequently Asked Questions
What are the torque specifications for the hydrostatic transmission pump on the New Holland L325?
The torque specification for the hydrostatic transmission pump case bolts on the New Holland L325 is 18 ft. lbs. (24 N·m). This value is found under the "TRANSMISSION" section of the bolt torque chart, ensuring proper assembly and function. p. 116
How can the hydraulic system be re-initialized on a New Holland L425 skid steer after a major service?
To re-initialize the hydraulic system after a transmission or pump overhaul, first fill the hydraulic reservoir with approved oil and ensure the loader is jacked up and securely blocked. Then, activate the boom and bucket pedals intermittently for three minutes at ½ throttle to bleed air from the system. After this, check the hydraulic oil level and neutralizer adjustment. p. 41
What are the torque specifications for the engine mounting bolts on the New Holland L445?
For the New Holland L445 (Deutz engine), the engine to engine mount bolts have varying torque specifications: 14 mm bolts require 94 ft. lbs. (126 N·m), 12 mm bolts require 57 ft. lbs. (76 N·m), and 10 mm bolts require 32 ft. lbs. (43 N·m). The engine mount to frame bolts for the L-445 (Deutz) require 66 ft. lbs. (89 N·m). p. 116
What is the engine crankcase capacity for the New Holland L-225 skid steer?
The engine crankcase capacity for the New Holland L-225 skid steer is 3.5 quarts (3.3 liters). This specification is crucial for proper engine lubrication and maintenance. p. 103
Is this New Holland Construction L-225, L-325, L-425, L-445 manual a digital?
Instant PDF download. You get the full 117-page searchable Service Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Am I able to print pages from this New Holland Construction L-225, L-325?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Can I find hydraulic circuit diagrams in this New Holland Construction L-225?
Yes, this New Holland Construction L-225, L-325, L-425, L-445 Service Manual includes hydraulic system diagrams, circuit schematics, and component specifications.
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