This John Deere GS66B GS72B GS78B GS84B GR72B GR84B GR66B GR78B Grapple Bucket Construction Operation Maintenance Manual provides comprehensive details on operating and maintenance procedures, controls and instruments, fuels and lubricants, periodic service, and troubleshooting. It is compatible with all Windows and Mac versions and can be viewed on mobile phones, iPads, notebooks, and computers. Get your copy today and keep your machine in top condition. Learn More