Cummins HGJAA-HGJAF ONAN Generator Service Manual | 2018

This is the complete factory service manual for the 2018 Cummins Onan HGJAA-HGJAF generator series. Covering all six model variants in this lineup, this is the same OEM documentation used by authorized Cummins service technicians to diagnose, maintain, and repair these generators to factory specifications.

• Adobe Acrobat (PDF) format
• Fully searchable
• Easily print any or all content
• Everything needed to repair & maintain your generator
• Troubleshooting instructions, wiring diagrams, and reference material

• Complete engine disassembly and assembly procedures
• Fuel, governor, and carburetion system service
• Electrical, ignition, and charging system diagnostics
• Cooling system inspection and maintenance
• Stator, rotor, and alternator servicing
• Control board testing and fault recovery
• Troubleshooting charts and diagnostic workflows
• OEM specifications and torque tables
• High-resolution wiring and system diagrams
• Fan and drive belt replacement procedures
• Flywheel inspection and service

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• Better than the hard copy I had.
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• This was a life saver for a piece of equipment I bought that did not have the manuals.
• The manual was just what I needed to fix the problem with my lower unit.
• Great customer service. My manual wasn't showing all the pictures and it turned out to be my PDF viewer. The seller helped me determine the problem and get it fixed.
• Exactly what I needed. Zero complaints.
• Treasure trove of information. Thank You.
• Received my repair manual as described — super easy. Will be nice to have detailed instructions for my machine.

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