A telehandler that cranks but won't start, and no schematic in the cab: that is the failure this book exists to fix. Factory service manual 3126024 covers the JLG 266, 307, and 266 LoPro telehandlers across 126 pages, the same JLG 266, 307 service manual PDF dealer techs pull up. Electrical schematics fill the back third of the book, with circuit breakdowns for the engine start and charging circuits plus fuse and relay maps. Hydraulic schematics pair with a pressure diagnosis routine, and the Deutz BF 4M 2012 gets its own section from cooling system through coupler replacement. Set low idle at 925 rpm, give or take 50, and torque wheel lug nuts to 300 Nm (221 lb-ft). One missing number can park your machine all afternoon. Bookmarked sections and a live text layer get you there fast; print the page and let it catch grease on the bench.
What's Inside This JLG 266, 307, 266 LoPro Manual
| System | Pages | Key Topics |
|---|
| Safety Practices | 7-10 | Introduction, Disclaimer, Operator & Safety Manual, Do Not Operate Tags, Safety Information |
| General Information and Specifications | 11-22 | Replacement Parts and Warranty Information, Torques (Astm Fastener Torque Chart, Metric Fastener Torque Chart) |
| Boom | 23-32 | Boom System Component Terminology, Boom System - Two Section Boom, Boom Assembly Maintenance, Boom Wear Pads, Quick Switch Assembly, Troubleshooting |
| Cab and Covers | 33-42 | Operator’s Cab and Covers Component Terminology, Operator’s Cab, Cab Components, Cab Removal, Cab Installation |
| Axles, Drive Shafts, Wheels and Tires | 43-54 | Axle, Drive Shaft and Wheel Component Terminology, Axle Assemblies, Drive Shafts, Wheels and Tires, Steering Adjustment, Brakes |
| Transmission | 55-60 | Transmission Assembly Component Terminology, Transmission Description, Transmission Specifications, Transmission Replacement, Towing a Disabled Machine |
| Engine: Deutz Bf 4M 2012 | 61-70 | Introduction, Engine Serial Number, Specifications and Maintenance Information, Engine Cooling System, Engine Electrical System, Fuel System, Engine Exhaust and Air Cleaner System |
| Hydraulic System | 71-92 | Hydraulic Component Terminology, Safety Information, Specifications, Hoses, Tube Lines, Fittings, Etc., Hydraulic Pressure Diagnosis |
| Electrical System | 93-126 | Electrical Component Terminology, Specifications, Fuses and Relays, Electrical System Schematics, Circuit Breakdowns, Engine Start Circuit, Charging Circuit |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| All Models |
| Standard wheel lug nut torque | 300 Nm (221 lb-ft) | p. 17 |
| Motor mount bolts torque | 97 Nm (71 lb-ft) | p. 69 |
| Fuel level sender resistance (full tank) | 31 ohms | p. 115 |
| Fuel level sender resistance (1/2 tank) | 101 ohms | p. 115 |
| Engine Low Idle | 925 ±50 rpm | p. 17 |
| Engine High Idle | 2370 ±50 rpm | p. 17 |
| Engine Crankcase Oil Capacity w/Filter Change | 9,0 liters (9.6 quarts) | p. 18 |
| Boom Pivot Pin Torque | 90 Nm (66 lb-ft) | p. 27 |
| 266 & 266 LoPro |
| Fuel Tank Capacity | 95 liters (25 gallons) | p. 18 |
| Hydraulic System Capacity | 106 liters (28 gallons) | p. 18 |
| 307 |
| Fuel Tank Capacity | 102 liters (27 gallons) | p. 18 |
| Hydraulic System Capacity | 133 liters (35 gallons) | p. 18 |
