John Deere 644K 4WD Loader Operators Manual (OMT260553 H3)

John Deere 644K 4WD Loader Operators Manual (OMT260553 H3)

This official operator’s manual provides essential instructions, operational guidelines, and daily maintenance procedures for the John Deere 644K 4WD Loader. Covering everything from safety protocols to monitor system navigation and advanced diagnostic procedures, this manual is ideal for both new and experienced machine operators seeking to ensure efficient and safe loader usage.

Model Covers:

644K 4WD Loader
PIN: 1DW644KZ__E634315–

File Format: PDF

Size: 9.17 MB

No. of pages: 300

Language: English

Delivery Method: Instant Download – Access your file immediately after purchase.

📑 Included Sections:

Safety and General Precautions

• Operational safety, fire prevention, rollover and backover avoidance
• Battery safety, chemical handling, PPE requirements
• Cab guarding, emergency preparedness, and welding guidelines

Operator Station and Controls

• Hydraulic lever configurations (2, 3, and 4 function), joystick control
• Advanced Display Unit (ADU) menu and diagnostics functions
• Security, reverse fan cycle, payload scale, ride control, JDLink™, object detection

Operating the Machine

• Pre-start inspections, cold weather starting, and break-in procedures
• Transmission and differential lock operation
• Loader control usage, return-to-dig, kickout adjustments, and attachment handling

Maintenance and Service Intervals

• Service schedules at 10h, 100h, 250h, 500h, 1000h, 2000h, 4000h, 6000h
• Oil/filter changes, air and fuel system maintenance, coolant testing
• Hydraulic system flush, driveline lubrication, brake system checks

Troubleshooting and Diagnostics

• Engine, transmission, brakes, hydraulics, steering, and A/C system fault analysis
• Diagnostic code interpretation and live system checkouts via ADU
• Operational checkout with engine off/on conditions

This John Deere 644K Operator’s Manual is an invaluable resource for daily use, safety assurance, and optimal loader performance management in a variety of job site conditions.