JLG 450A, 450AJ Boom Lift Service Manual
116 pages · Publication 3120869
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- Models
- 450A, 450AJ
- Serial coverage
- Prior to 0300065080, Exclude Serial Number Range: 0300062713, 0300062755, 0300064188, 0300064241, 0300064340, 0300064366, 0300064407, 0300064430, 0300064580, 0300064581, 0300064583, 0300064605-0300064609, 0300064691, 0300064705, 0300064706, 0300064735, 0300064737, 0300064753, 0300064754, 0300064774, 0300064775, 0300064792, 0300064794, 0300064806, 0300064918, 0300064923, 0300064924, 0300064927, 0300064928, 0300064933, 0300064934, 0300065012, 0300065014, 0300065015, 0300065028, 0300065031, 0300065032, 0300065046, 0300065049, 0300065050, 0300065063, 0300065066, 0300065067, 0300065078
- Manual type
- Service Manual
- Pages
- 116
- Publication
- 3120869
- Condition
- Brand new
What's inside
From the manual's own table of contents: 74 sections, 118 entries. See sample pages (PDF, 499 KB)
Maintenance44 topics
- Capacities
- Component Data
- Tires
- Specifications and Performance Data
- Torque Requirements
- Lubrication
- Pressure Settings - PSI (Bar)
- Major Component Weights
- Critical Stability Weights
- Cylinder Specifications
- Function Speeds (in Seconds)
- Serial Number Location
- General
- Service and Guidelines
- Lubrication and Information
- Cylinders - Theory of Operation
- Valves - Theory of Operation
- Boom Maintenance
- Drift Test
- Cylinder Checking Procedure
- Cylinder Repair
- Mid and Lower Lift Cylinder Bleeding Procedure
- Hydraulic Pump (gear)
- Swing Bearing
- Worm gear
- Boom Synchronizing Procedure
- Extend-A-Reach
- Adjustment Procedure For Lockout Valve
- Torque Hub (Prior to S/N 39594)
- Torque Hub (S/N 39594 to Present)
- Drive Brake (Ausco)
- Boom Limit Switches
- Lift Up and Platform Level Down Disable Switch
- Throttle Checks and Adjustments - Deutz Engine
- Drive and Steer Controller
- Lift and Swing Controller
- Function Control
- Tilt Alarm Switch
- Pressure Setting Procedures
- Hydraulic Component Start-Up Procedures and Recommendations
- Semi-Track
- Preventive Maintenance and Inspection Schedule
- Troubleshooting
- Hydraulic Circuit Checks
Show all 74 sections
Inside this manual
Real pages from this service manual (116 pages). Open the sample pages (PDF, 497 KB)
- Specifications, page 9: SECTION 1 - SPECIFICATIONS
- Troubleshooting, page 83: SECTION 3. TROUBLESHOOTING
- Diagram, page 108: Figure 3-7. Hydraulic Schematic - Proportional Controls
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the 450A, 450AJ 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, 116 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
Other editions and similar models
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).