When the hydrostatic drive starts pulsing or a steering lever won't neutralize, the four skid-steer loaders in Sperry New Holland's L-series all point back to the same 214-page factory service manual, OEM 40003531. Hydraulic circuit diagrams in this Sperry New Holland L-35, L-775, L-778, L-779 service manual PDF trace oil flow through the loader valve and steering circuits, and separate chapters carry you through Vickers and Cessna transmission overhauls from removal through pump and motor shimming. A dedicated troubleshooting section pairs symptoms with causes, and the cylinder rebuild procedures cover both bucket and boom cylinders down to seal replacement. Verify Vickers charge pressure against the 65 psi (4.5 bar) spec, then torque wheel lugs to 150 ft. lbs. (202 N·m) on reassembly. One made-up pressure figure can take out a rebuilt transmission. Download the bookmarked, text-searchable PDF and know which gear-sprocket casting your final drive takes before you order it.
What's Inside This Sperry New Holland L-35, L-775, L-778, L-779 Manual
| System | Pages | Key Topics |
|---|
| Safety | 3-7 | Personal Safety |
| Introduction | 8-9 | Hydrostatic Drive, Four-Way Gearbox, Steering Levers, Hydrostatic Pulsations, Tractive Effort |
| Servicing Vickers-Equipped Loaders | 10-59 | Vickers Transmission Removal, Hydrostatic Transmission Operation, Vickers Transmission Disassembly, Vickers Transmission Pump and Motor Shimming |
| Servicing Cessna-Equipped Loaders | 60-124 | Cessna Transmission Removal, Cessna Transmission Overhaul, Cessna Transmission Oil Leaks, Shimming Four-Way Gear Box, System Cleaning Procedure After Transmission Overhaul |
| General Information - Vickers and Cessna-Equipped Skid-Steer Loaders | 125-207 | Start-Up Procedure, Final Drive Disassembly and Assembly, Hydraulic System Pressure Checks, Servicing the Control Valve, Rebuilding Bucket and Boom Cylinders, Electrical System |
| Adjustable Fittings | 208 | O-Ring Lubrication, Metal Back-Up Washer, Straight Thread Boss, Lock Nut, Fitting Positioning |
| Bite-Type Flareless Fittings | 209 | Ferrule Installation, Tube Preparation, Tube Bottoming, Wrench Torque, Ferrule Bite Inspection |
| Tube Fitting Trouble Shooting | 210 | Flared Tube Angle, Embedded Burrs, Indented Seams, Nose Scratches, Seal Line Contact, Tube Alignment |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| All Models |
| Wheel lug torque | 150 ft. lbs. (202 N·m) | p. 143 |
| Sprocket retaining cap screw torque | 85 ft. lbs. (115 N·m) | p. 140 |
| Brake disc cap screw torque | 35 ft. lbs. (47 N·m) | p. 142 |
| Old model gear-sprocket backlash | .004”-.008" (.012-.203 mm) | p. 136 |
| New model gear-sprocket backlash | .010"-.014” (.254-.356 mm) | p. 136 |
| Main system relief valve pressure | 2,000-2,250 psi (13,790-15,510 kPa) | p. 144 |
| Main line filter (L-35) | 25 Micron | p. 181 |
| Transmission filter (L-35) | 10 Micron | p. 181 |
| Main system pressure | 2200-2400 psi | p. 194 |
| L-35 |
| Main System Relief Valve Pressure (L-35) | 2000 psi | p. 181 |
| L-775 |
| Main System Relief Valve Pressure (L-775) | 2000 psi | p. 182 |
| L-778 |
| Main System Relief Valve Pressure (L-778) | 2000 psi | p. 184 |
