JLG 450A, 450AJ Boom Lift Service Manual
152 pages · Publication 3120749
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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
- 152
- Publication
- 3120749
- Condition
- Brand new
What's inside
From the manual's own table of contents: 92 sections, 141 entries. See sample pages (PDF, 599 KB)
Maintenance49 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
- Cylinder Checking Procedure
- Cylinder Repair
- Mid and Lower Lift Cylinder Bleeding Procedure
- Hydraulic Pump (Gear)
- Swing Bearing
- Worm Gear
- Boom Synchronizing Procedure
- Bleeding Oscillation Cylinders
- Oscillating Axle Lockout Test
- 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
- Electric Governor Installation and Adjustments - Ford Engine (Prior to S/N 46089)
- Ford EFI Engine (machines after S/N 46089)
- Drive and Steer Controller
- Lift and Swing Controller
- Function Control
- Throttle Checks and Adjustments - Deutz Engine
- Automatic Choke Adjustment - Ford Engine
- Cold Weather Starting Difficulty
- Checking the Fuel
- 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 92 sections
Inside this manual
Real pages from this service manual (152 pages). Open the sample pages (PDF, 597 KB)
- Specifications, page 9: SECTION 1 - SPECIFICATIONS
- Troubleshooting, page 109: SECTION 3. TROUBLESHOOTING
- Diagram, page 143: Figure 3-16. Electrical Schematic - Platform - Isuzu - Sheet 2
- Color page, page 91: SECTION 2 - PROCEDURES
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, 152 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).