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JLG

JLG Compact Crawler Booms X390AJ Ansi Illustrated Master (p/n 3121276) Parts Catalog

JLG Compact Crawler Booms X390AJ Ansi Illustrated Master (p/n 3121276) Parts Catalog

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Machine data plateRef 269514
Brand
JLG
Equipment
Material Handling
Models covered
JLG X390AJ
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you โ€” re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your serial range? Ask us before you buy
๐Ÿท๏ธ Basic Information
Identification
Make:
JLG
Model:
X390AJ
Model Variant:
Compact Crawler Boom Lift (ANSI market)
Product Type:
Illustrated Master Parts Catalog
JLG Part Number:
3121276
Manual Coverage:
X390AJ compact crawler boom, ANSI configuration
Production Years
Production Years Covered:
N/A - not stated in source description; refer to serial number applicability in manual
Applicability:
Confirm by machine serial number and ANSI build configuration
๐Ÿ‘‹ Introduction
Audience
Target Audience:
JLG service technicians, fleet maintenance shops, and owners performing parts identification and repair
Market Position:
OEM-issued illustrated parts catalog for the X390AJ compact crawler boom
Advantages
OEM Part Numbers:
Exploded-view illustrations with factory part numbers for accurate ordering
Searchable PDF:
Zoomable, printable, bookmarked chapters for fast navigation
Instant Delivery:
Digital download, no shipping, re-download available
Key Features
Content Type:
Illustrated master parts catalog with component identification
Coverage:
Full machine assembly breakdown by system
Special Tools:
Tool part numbers included in the parts listings
๐Ÿ“‹ Manual Details
Coverage
Coverage Areas:
Complete X390AJ machine assembly including boom, chassis, hydraulics, electrical, and controls
Manual Type:
Illustrated Master Parts Catalog (OEM)
Part Number:
3121276
Format & Language
File Format:
Searchable PDF
Delivery Method:
Instant digital download
Binding:
Digital
Language:
English
Page Count:
N/A - not stated in source description
Compatibility
Devices:
Windows PC, Mac, tablets, and smartphones
Features:
Zoomable, printable, bookmarked chapters
๐Ÿ“– Manual Coverage
Systems Covered
Boom Assembly:
Jib, boom sections, and pivot components with exploded views
Chassis & Crawler Undercarriage:
Track frames, rollers, and crawler drive components
Platform & Basket:
Platform structure and gate components
Hydraulic System:
Pumps, valves, cylinders, hoses, and fittings
Electrical System:
Harnesses, relays, switches, and control box components
Controls:
Platform and ground control assemblies
Power Source:
Engine or power unit mounting components
Decals & Labels:
ANSI decal and warning label part numbers
Fasteners:
Hardware and fastener part listings
Procedures & Depth
Parts Identification:
OEM part numbers tied to each illustration
Assembly Reference:
Exploded-view diagrams showing component order and location
Technical Depth:
Parts and assembly reference; no repair procedures included
Torque Specs:
N/A - not included in a parts catalog
Diagnostics:
N/A - not included in a parts catalog
Parts Information
OEM Part Numbers:
Included throughout illustrations
Supersessions:
Verify current part numbers with JLG dealer
Ordering Reference:
Use JLG part number 3121276 for the catalog itself
๐Ÿ“Š Manual Specifications
File & Compatibility
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android โ€” any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print & Binding
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A โ€” digital download, no physical binding
Paper Type:
N/A โ€” digital download, no physical paper
โš™๏ธ Engine Specifications
Engine
Engine Type:
Refer to machine-specific JLG data; catalog covers mounting and related parts
Engine Options:
ANSI X390AJ configuration; verify by serial number
Fuel System:
N/A - not specified in source description
Performance
Performance Ratings:
N/A - not specified in source description
Details:
Engine specification is not part of a parts catalog; consult the service manual
๐Ÿ”ง Transmission
Drive
Standard Transmission:
Crawler track drive system
Optional Transmission:
N/A - not specified for this model
Features
Drive Type:
Track-based propulsion for compact crawler boom
Components:
Track drive motors and gearboxes listed in parts illustrations
๐Ÿ“ Dimensions
Exterior
Wheelbase:
N/A - not applicable; crawler track machine
Length:
N/A - not specified in source description
Weights
Curb Weight:
N/A - not specified in source description
Machine Weight:
Refer to JLG specification sheet for the X390AJ
๐Ÿ›ก๏ธ Safety Features
Ratings & Standards
Crash Test Ratings:
N/A - not applicable to aerial work platforms
Compliance:
ANSI-configured machine
Active & Passive
Active Features:
Platform and ground controls, emergency stop
Passive Features:
Guardrails, platform gate, decals and warning labels
Decals:
ANSI decal part numbers included in catalog
๐Ÿ’ก Technology Features
Controls & Display
Infotainment:
N/A - not applicable to this machine class
Control System:
Platform and ground control stations with proportional functions
Driver Assistance
Assistance Features:
N/A - not applicable; refer to JLG manual for machine controls
Electrical Components:
Relays, switches, and harnesses listed in parts illustrations
๐Ÿ”ง Maintenance
Service
Service Intervals:
N/A - not stated in source description; consult JLG service manual
Fluid Specifications:
N/A - not stated in source description
Known Items
Common Wear Items:
Track components, hydraulic hoses, filters, and platform gate components
Parts Reference:
Use catalog illustrations to identify wear parts by OEM number
๐Ÿ“š Vehicle History
Brand & Evolution
Manufacturer:
JLG Industries
Brand Heritage:
JLG is a manufacturer of aerial work platforms and telehandlers
Model Evolution:
X390AJ compact crawler boom; ANSI market variant
Production
Production Location:
N/A - not stated in source description
Serial Applicability:
Verify coverage by machine serial number
๐Ÿ† Awards & Recognition
Recognitions
Model Awards:
N/A - not stated in source description
Era Recognition:
N/A - not stated in source description

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the serial range before you buy

Manufacturers change procedures and part numbers by serial-number break. If your data plate shows a serial prefix that is not listed above, contact us with the model and serial number and we will confirm coverage before you order.

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  • Instant download PDF link on your order page and by email right after payment.
  • Secure checkout Encrypted Shopify checkout โ€” we never see your card.
  • Print-ready PDF Searchable text, print the pages you need for the workshop.
  • Phone, tablet, PC Open it in the cab, the workshop or the office.