Part of the New Holland Repair Manuals.
Looking for a New Holland LS 55 service manual PDF? This 594-page factory manual (OEM #40002551) walks you through the entire 1995-1996 yard tractor line: LS 25, 35, 45, and 55. You get wiring diagrams for the fuse block, relay, and fuel level circuits, plus complete Kohler Command engine sections from 11 HP up through 22 HP. Inside: electrohydraulic lift schematics, relief valve testing, a full troubleshooting guide for engines that crank but won't start, and spindle overhaul steps for the 52-inch mower deck. Set the UP mode relief valve at 1000 psi and the DOWN mode at 400 psi, then torque your steering wheel retaining nut to 50 ft. lbs. No more chasing wiring faults with a multimeter and a prayer. The text layer is fully searchable, so you can jump to any spec, torque value or part name right from the shop floor.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Forward | 5-6 | Supplement Usage, Production Variations, Continuous Improvement |
| Electrical System (Supplement) | 7-14 | Indicator Light Panel, Fuse Block Location, Relay Identification, Fuel Level Circuit, Engine Temperature Circuit, Wiring Diagrams |
| PTO Clutch, Brakes & Steering | 15-19 | Single Sheave Style, Output Sheave Changes, Brake Linkage Components, Brake Adjustment, Steering Wheel Torque |
| Electrohydraulic Lift | 21-40 | Lift System Components, Pump Assembly, Relief Valve Testing, Lift Cylinder Rebuilding, Lift Switch Testing |
| Specifications (LS25–LS55) | 41-58 | LS25 Specs, LS35 Specs, LS45 Specs, LS55 Specs, Mower Deck Specs, Optional Equipment |
| Mower Decks | 59-72 | 52-Inch Mower Deck, Two-Belt Drive System, Spindle Overhaul, Blade Installation |
| Kohler Engine, Specifications, Tools & Troubleshooting | 75-113 | Engine Identification, General Specifications, Special Service Tools, Troubleshooting Guide, Air Cleaner Service |
| Kohler Engine, Fuel, Lubrication & Electrical | 114-169 | Carburetor Service, External Governor, Fuel Recommendations, Lubrication System, Retractable Starter, Charging System, Ignition System |
| Kohler Engine, Disassembly, Inspection & Reassembly | 170-220 | Engine Disassembly, Connecting Rods, Crankshaft Inspection, Reconditioning Limits, Reassembly Sequence |
| Kohler CV18-22 Engine, Specifications, Tools & Fuel System | 221-267 | CV18-22 Specifications, Tolerances, Special Tools, Troubleshooting, Fuel System, Governor Adjustment |
| Kohler CV18-22 Engine, Electrical, Disassembly & Reassembly | 268-336 | Electrical System and Components, Charging System, Engine Disassembly, Inspection and Reconditioning, Reassembly |
| Tractor Electrical System | 337-382 | PTO Switch, Safety Start Circuit, Ohmmeter Testing, Wiring Diagrams, Component Location |
| PTO Clutch | 383-390 | PTO Clutch Service, Sheave Removal, Adjustment |
| 820 Series Transaxle | 391-422 | Input Shaft Disassembly, Gear Service, Transaxle Assembly |
| Model K61A Tuff Torq Hydrostatic Transaxle | 423-494 | N-Centering Sub-Assembly, Case Service, Hydrostatic Unit Overhaul, Packing Replacement |
| Steering, Front Axle & Lift Linkage | 495-522 | Wheel Bearings, Front Axle Service, Steering Components, Lift Lever Linkage Adjustment |
| Specifications | 523-550 | Torque Values, Service Specifications, Clearances |
| Mower Decks | 551-594 | Mower Deck Adjustments, Spindle Service, Belt Routing, Deck Removal, Index |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Pump output | 0.23 gallons per minute at 500 psi | p. 26 |
| UP mode pressure relief valve | 1000 psi | p. 26 |
| Steering wheel retaining nut torque | 50 ft. lbs. | p. 19 |
| Spindle pulley retaining nut torque | 80-100 ft. lbs. | p. 72 |
| LS 25, LS 35 | ||
| Battery (LS 25 / LS 35) | NH F300, 235 CCA @ 0°F | p. 373 |
| LS 45, LS 55 | ||
| Battery (LS 45 / LS 55) | NH F350, 300 CCA @ 0°F | p. 373 |
| LS 55 | ||
| Lift cylinder locknut torque | 20-25 ft. lbs. | p. 35 |
