From lift cylinder teardown through drive axle and brake repair to control card setup, this JLG 26MRT service manual PDF (OEM 3120892) walks every system on this scissor lift across 62 pages. Hydraulic schematics map the lift, steer, and drive circuits so you can trace a pressure problem line by line, and wiring diagrams do the same for the electrical side. Troubleshooting fills roughly the final third of the book, pairing symptoms with hydraulic circuit checks that end at a specific component. Check drive pump output against the rated 56.8 lpm (15 gpm) at 3,000 rpm, then torque the wheel lug nuts to 122 Nm (90 ft lb) on reassembly. A drifting platform won't say which holding valve let go. Bookmarks and a live text layer put the cylinder checking procedure two clicks from the cover.
What's Inside This JLG 26MRT Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction - Maintenance Safety Precautions | 3-6 | General, Hydraulic System Safety, Maintenance |
| Specifications | 7-12 | Capacities, Component Data, Performance Data, Torque Requirements, Lubrication, Cylinder Specifications, Pressure Settings, Serial Number Locations |
| General Maintenance Guidelines | 13-15 | Safety and Workmanship, Cleanliness, Component Removal and Installation, Hydraulic System Maintenance, Lubrication |
| Cylinder Theory and Repair | 16-24 | Cylinder Theory of Operation, Cylinder Checking Procedures, Lift Cylinder Removal and Installation, Lift Cylinder Repair, Steer Cylinder Repair |
| Tilt Alarm and Pressure Settings | 25-26 | Tilt Alarm Switch Adjustment, Pressure Setting Procedures, Lift Relief Adjustments, Steer Relief Adjustment |
| Drive Axle and Brake Repair | 27-37 | Axle Removal and Installation, Wheel Bearings, Carrier Section Disassembly and Assembly, Ring Gear and Pinion Tooth Pattern, Brake Repair |
| Throttle and Control Card Setup | 38-42 | Throttle Checks and Adjustments, Valve Driver Card Setup, Horsepower Card Test |
| Preventive Maintenance Schedule | 43-44 | Preventive Maintenance and Inspection Schedule, Inspection and Maintenance Codes, Maintenance Interval Table |
| Troubleshooting | 45-62 | General, Troubleshooting Information, Hydraulic Circuit Checks |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel lug nuts torque | 122 Nm (90 ft lb) | p. 8 |
| Tapered Bushing Retaining Screws - Lift Cylinder torque | 80 ft lb (108 Nm) | p. 21 |
| Hydraulic Filter - Inline Return - Bypass Type | 10 Microns Nominal | p. 7 |
| Drive Pump Output | 56.8 lpm (15 gpm) @ 3,000 rpm | p. 7 |
| Lift/Steer Pump Output | 11.7 lpm (3.1 gpm) @ 3,000 rpm | p. 7 |
| Main Relief pressure | 145 bar (2100 psi) | p. 9 |
| Steer Relief pressure | 103 bar (1500 psi) | p. 9 |
| Hydraulic Oil Tank Capacity | 56.8 liters | p. 7 |
| Fuel Tank Capacity | 29.5 liters | p. 7 |
| Daihatsu Engine Idle Speed | 1,500 rpm | p. 7 |
| Yanmar Engine Idle Speed | 1,200 rpm | p. 7 |
| Wheel Lug Nut Torque | 122 Nm | p. 8 |
JLG 26MRT Common Problems This Manual Covers
JLG 26MRT drive and steer functions dead until engine runs 15 minutes, then works normally
Check hydraulic oil grade first; oil too heavy for the climate starves the drive pump until it warms. Verify tank level against the 56.8 liter capacity, then test drive pump flow, which should reach 56.8 lpm (15 gpm) at 3,000 rpm. Follow the troubleshooting procedures starting on page 46, and replace the 10 micron return filter if bypassing.
Manual Section: Troubleshooting p. 46Machine will not drive in either direction, brakes stay locked, lift works fine
Verify the platform emergency stop and all interlocks before condemning parts. Test main system pressure at the relief; you need 145 bar (2100 psi). If pressure is good, check brake release pressure at the hubs, tracing the circuit on the hydraulic schematic on page 58, and inspect drive controller wiring against the diagram on page 54.
Manual Section: Chassis TroubleshootingPlatform raises fine when empty but stalls and drifts down with anything near rated load
Test lift relief pressure with the platform loaded; adjust to 145 bar (2100 psi) using the pressure setting procedure on page 25. Rated capacity is 455 kg, so confirm the test load first. If pressure holds but the platform still drifts, check the lift cylinder holding valve and reseal the cylinder following the service procedures on page 17.
Manual Section: Tilt Alarm and Pressure Settings p. 25Hydraulic pump whining loudly, oil foaming in tank, every function slow and jerky
Check oil level with the platform fully lowered; the tank holds 56.8 liters and a low level pulls air into the suction line. Inspect suction fittings for loose clamps and tighten them. Replace the 10 micron inline return filter, then run the hydraulic circuit checks in the troubleshooting section starting on page 45.
Manual Section: Hydraulic System TroubleshootingSteering inoperative or machine wanders and pulls to one side on flat ground
Test steer relief pressure and set it to 103 bar (1500 psi) per the adjustment procedure on page 25. For wander, check wheel bearings and lug nuts, torquing lugs to 122 Nm. If the cylinder bypasses internally, remove and reseal it following the steer cylinder repair steps in the cylinder section starting on page 16.
Manual Section: Steer Cylinder RepairFrequently Asked Questions
What are the torque specifications for the wheel lug nuts on the JLG 26MRT?
The wheel lug nuts on the JLG 26MRT should be torqued to 122 Nm (90 ft lb) every 150 hours of operation. p. 8
What are the hydraulic filter replacement specifications for the JLG 26MRT scissor lift?
The hydraulic return and charge pump filters should be checked, cleaned, and/or replaced at 50-hour and 300-hour intervals as specified in the lubrication chart. p. 10
What is the correct torque value for the tapered bushing retaining screws on the JLG 26MRT lift cylinder?
When rebuilding the lift cylinder, the tapered bushing retaining screws must be torqued to 80 ft lb (108 Nm) using Loctite #242. p. 21
What is the procedure for adjusting the lift up relief pressure on a JLG 26MRT scissor lift?
Install a pressure gauge at gauge port MP on the valve body. Activate the Lift Up function from the platform control station, bottom out the function, and adjust the relief to 145 bar (2100 psi). p. 25
What is the required torque for the differential bearing cap screws on a JLG 26MRT?
The differential bearing cap screws must be torqued to 95-122 Nm (70-90 ft. lb.) using a suitable torque wrench. p. 33
Do I get instant access to this JLG 26MRT Service Manual?
You get a 62-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Am I able to print pages from this JLG 26MRT manual?
Yes. The PDF is DRM-free, so printing works from any reader and any printer.
Reviews
There are no reviews yet.