Terex Genie GR-20J, GR-26J Mast Boom Lift Service Manual
119 pages · Publication 227656
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- Models
- Genie GR-20J, GR-26J
- Serial coverage
- See Cover
- Manual type
- Service Manual
- Pages
- 119
- Publication
- 227656
- Condition
- Brand new

What's inside
From the manual's own table of contents: 64 topics. See sample pages (PDF, 446 KB)
- Important Information
- Revision History
- Serial Number Legend
- General Safety Rules
- Machine Specifications
- Performance Specifications
- Hydraulic Specifications
- Manifold Component Specifications
- Hydraulic Hose and Fitting Torque Specifications
- SAE and Metric Fasteners Torque Charts
- Introduction
- Pre-delivery Preparation Report
- Maintenance Inspection Report
- Inspect the Manuals and Decals
- Perform Pre-operation Inspection
- Perform Function Tests
- Perform 30 Day Service
- Hydraulic Suction Strainer
- Inspect the Batteries
- Inspect the Electrical Wiring
- Inspect the Tires, Wheels
- Test the Emergency Stop
- Test the Horn
- Test the Key Switch
Show all 64 topics
- Test the Drive Brakes
- Test the Drive Speed - Stowed Position
- Test the Drive Speed - Raised Position
- B-10 Inspect the Flashing Beacons (if equipped)
- B-11 Test the Motion Alarm
- B-12 Perform Hydraulic Oil Analysis
- B-13 Inspect the Breather Cap
- B-14 Inspect the Rear Axle Free-wheeling
- B-15 Inspect the Lateral Offset of the Mast
- B-16 Inspect the Mast Wear Pads
- Calibrate the Platform Overload System (if equipped)
- Models with Optional Hydraulic Oil
- Replace the Hydraulic Tank Return Filter Element
- Test or Replace the Hydraulic Oil
- Circuit Boards
- Controller Adjustments
- Platform
- Platform Overload System
- Jib Cylinder
- Mast Assembly
- Lift Cylinder
- Level Sensor
- Function Pump
- Function Manifold Components
- Valve Adjustments - Function Manifold
- Hydraulic Tank
- Turntable Rotation Motor
- Battery
- Battery Charger
- 10-2 Steer Cylinder
- 10-3 Steering Rod
- 10-4 Steer Angle Sensor
- 11-1 Drive Motors
- 11-2 Drive Brake
- Fault Code Chart
- Electrical Component and Wire Color Legend
- ECM Pin-out legend
- Limit Switch and Sensor Legend
- Electrical Symbols Legend
- Component Reference and Hydraulic Symbols Legend
Inside this manual
Real pages from this service manual (119 pages). Open the sample pages (PDF, 446 KB)
- Specifications, page 16: Section 2 • Specifications
- Troubleshooting, page 94: Section 5 • Fault Codes
- Diagram, page 107: Section 6 • Schematics
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the Genie GR-20J, GR-26J are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
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This is a service manual
Here's how it compares to the other manual types.
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 119 pages
Quantity one is the manual described above.
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60-day returns
Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).