Stabil-TRAK trips up more wrenches than any other system on these telehandlers, and this JLG 6042 service manual PDF (OEM ID 31200353) closes its 230 pages with a full chapter on circuit operation, system tests, and boom interlock troubleshooting, after working through five models from the 6036 to the 10054. Electrical schematics trace the start circuit, charging circuit, and every solenoid and sender back to the fuse and relay panel. Hydraulic circuit drawings carry your pressure diagnosis from reservoir to cylinder, and boom service, three-section and four-section systems, extend chains, and wear pads, fills the largest chapter. Verify charging output against the rated 12V, 120 amp alternator on a 6042, then set size 6 ORFS fittings to 23 lb-ft (31 Nm). Sunday night, one machine down, nobody answering the phone. This bookmarked, text-searchable PDF is built for that hour, and the component terminology sections mean the part you order Monday is the right one.
What's Inside This JLG Skytrak 6036-10054 Series 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 Schedules, Lubrication Schedules |
| Boom | 39-94 | Boom System Component Terminology, Safety Information, Boom System - Three Section, Boom Assembly Maintenance, Boom System - Four Section, Boom Extend and Retract Chains |
| Cab and Covers | 95-104 | Operator Cab and Covers Component Terminology, Operator Cab, Cab Components, Cab Removal, Cab Installation |
| Axles, Drive Shafts, Wheels and Tires | 105-122 | Axle, Drive Shaft and Wheel Component Terminology, Axle Assemblies, Axle Assembly and Drive Shaft Troubleshooting, Drive Shafts, Wheels and Tires, Brakes, Towing a Disabled Machine |
| Transmission | 123-132 | Transmission Assembly Component Terminology, Transmission Serial Number, Transmission Specifications and Maintenance Information, Transmission Replacement |
| Engine - Cummins QSB3.3T/QSB4.5T | 133-144 | Introduction, Engine Serial Number, Specifications and Maintenance Information, Engine Cooling System, Engine Electrical System, Fuel System, Engine Exhaust System |
| Hydraulic System | 145-182 | Hydraulic Component Terminology, Safety Information, Hydraulic Pressure Diagnosis, Hydraulic Circuits, Hydraulic Reservoir, Hydraulic System Pump, Valves and Manifolds |
| Electrical System | 183-214 | Electrical Component Terminology, Specifications, Safety Information, Fuses and Relays, Electrical System Schematics, Engine Start Circuit, Charging Circuit |
| Stabil-TRAK System and Boom Interlock System | 215-230 | Stabil-TRAK System Component Terminology, Boom Extend Interlock System Component Terminology, Stabil-TRAK Description, Stabil-TRAK Electrical Circuit Operation and Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| All Models |
| Alternator (6036 & 6042) | 12V, 120 Amps | p. 24 |
| Alternator (8042, 10042 & 10054) | 12V, 100 Amps | p. 24 |
| Size 4 Orfs Torque | 13 lb-ft (18 Nm) | p. 22 |
| Size 4 JIC Torque | 13 lb-ft (18 Nm) | p. 22 |
| Transmission oil filter installation torque | 20-25 lb-ft (27-34 Nm) | p. 128 |
| Return filter bypass pressure | 25 psi (1,7 bar) | p. 165 |
| Outrigger pressure switch torque | 25-38 lb-ft (34-41 Nm) | p. 204 |
| Fuel Tank Capacity | 37 gallon (140 liter) | p. 28 |
| 6036, 6042 |
| Engine Crankcase Oil Capacity (Cummins QSB3.3) | 7.6 quart (7,2 liter) | p. 28 |
| Hydraulic System Capacity | 57 gallon (216 liter) | p. 28 |
| 8042, 10042, 10054 |
| Engine Crankcase Oil Capacity (Cummins QSB4.5) | 11.0 quart (10,4 liter) | p. 28 |
| 8042 |
| Hydraulic System Capacity | 58 gallon (218 liter) | p. 28 |
