Straight from JLG's own service literature, document 31200151 is the factory book for the G6-42A, G9-43A, and G10-43A telehandlers, and this JLG G6-42A, G9-43A, G10-43A service manual PDF gives you all 244 pages of it. The electrical section alone runs close to a third of the book: complete system schematics, circuit breakdowns for the start and charging circuits, joystick fault codes, and Cummins SAE diagnostic trouble codes. Hydraulic pressure diagnosis traces each circuit from the implement pump through the control valves to the cylinders, with engine coverage for John Deere, Perkins, and Cummins. When you service the boom, torque the compensation cylinder lock bolts to 100-110 lb-ft, and fill the reservoir to 20 gallons on the G6-42A or 23.3 on the 43A machines. Guessing costs real money: a wrong part, a second teardown. Bookmarked and text-indexed, this file travels to whatever jobsite the machine does; grab your copy and keep it there.
What's Inside This JLG G6-42A, G9-43A, G10-43A Manual
| System | Pages | Key Topics |
|---|
| Safety Practices | 9-12 | Introduction, Disclaimer, Operation & Safety Manual, Do Not Operate Tags, Safety Information, Safety Instructions, Safety Decals |
| General Information and Specifications | 13-38 | Replacement Parts and Warranty Information, Torque Charts, Specifications, Fluid and Lubricant Capacities, Service and Maintenance Schedule, Lubrication Schedule |
| Boom | 39-72 | Boom System Component Terminology, Boom System - Three Section, Boom Assembly Maintenance, Complete Boom Removal/Installation, Boom Section Removal/Installation |
| Cab and Covers | 73-86 | Operator Cab and Covers Component Terminology, Operator Cab, Cab Components, Cab Removal, Cab Installation |
| Axles, Drive Shafts, Wheels and Tires | 87-100 | Axle, Drive Shaft and Wheel Component Terminology, Axle Assemblies, Drive Shafts, Wheels and Tires, Brakes, Towing a Disabled Machine |
| Transmission | 101-114 | Transmission Assembly Component Terminology, Transmission Serial Number, Transmission Specifications and Maintenance Information, Transmission Replacement, Engine Drive Plate |
| Engine | 115-132 | Introduction - John Deere, Introduction - Perkins, Introduction - Cummins, Engine Cooling System, Engine Electrical System, Fuel System, Engine Exhaust System, Air Cleaner Assembly |
| Hydraulic System | 133-162 | Hydraulic Component Terminology, Safety Information, Hydraulic Pressure Diagnosis, Hydraulic Circuits, Hydraulic Reservoir, Implement Pump, Control Valves, Hydraulic Cylinders |
| Electrical System | 163-244 | Electrical Component Terminology, Specifications, Safety Information, Fuses and Relays, Electrical System Schematics, Circuit Breakdowns, Engine Start Circuit, Charging Circuit |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Battery Reserve Capacity | 1000 Cold Cranking Amps @ 0° F (-18° C) | p. 25 |
| Alternator (with Optional A/C) | 12V, 65 Amps (12V, 105 Amps) | p. 25 |
| Hydraulic System Reservoir Capacity (G6-42A) | 20 gallons (75,7 liters) | p. 29 |
| Hydraulic System Reservoir Capacity (G9-43A & G10-43A) | 23.3 gallons (88,2 liters) | p. 29 |
| compensation cylinder, pins and bolts | 100-110 lb-ft (135-149 Nm) | p. 43 |
| lift/lower cylinder, pin and lock bolt | 200-215 lb-ft (271-291 Nm) | p. 43 |
| wheel lug nut torque | 350-400 lb-ft (475-542 Nm) | p. 98 |
| manual release screw adjustment | 1.26 in (32 mm) | p. 99 |
| Transmission filter torque | 20-25 lb-ft (27-34 Nm) | p. 106 |
| Transmission overheating threshold | 248° F (120° C) | p. 109 |
| Engine Oil Capacity (John Deere, Before S/N 0160007869) | 14.5 quarts | p. 27 |
| Engine Oil Capacity (Cummins) | 7.6 quarts | p. 27 |
