Part of the John Deere Repair Manuals.
This 684-page John Deere 444D, 544D, 644D Repair Manual (OEM #TM-1341) covers every system on all three Loader variants, from axles and transmission to the torque converter and steering. Open it up and you get full wiring diagrams for the electrical system, hydraulic schematics for the loader and brake circuits, and step-by-step procedures for engine, transmission, and axle teardown. You'll also find fluid capacity charts and maintenance interval schedules that match your machine's actual service life. Torque the cap screws to 410 ± 40 N-m (300 ± 30 lb-ft), and set 644D slow idle to 900 ± 25 rpm exactly like the factory calls for. No more guessing numbers off a forum thread while your loader sits dead in the yard. It's bookmarked by section and searchable by keyword, so you can jump straight to the transmission or wiring pages and get back to turning wrenches.
What's Inside This John Deere 444D, 544D, 644D Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 7-18 | Manual Structure, Safety Information, Hazard Prevention, Safe Work Practices |
| General | 19-52 | 444D Loader, 544D Loader, 644D Loader, Torque Values, Fuels and Lubricants, Inspection Procedures |
| Wheels | 53-60 | Power Wheels and Fastenings |
| Axles and Suspension System | 61-154 | Removal and Installation, Differential or Bevel Drive (Differential and Differential Lock), Input Drive Shafts and U-Joints, Axle Shafts, Bearings and Reduction Gears |
| Transmission | 155-312 | Removal and Installation, Controls Linkage, Input Drive Shafts and U-Joints, Gears, Shafts, Bearings and Powershift Clutch, Hydraulic System |
| Engine | 313-358 | Engine Removal and Installation, Cylinder Head, Pistons and Crankshaft, Fuel Injection, Diesel Engine (444D 90hp / 544D 115hp / 644D 155hp) |
| Engine Auxiliary System | 359-384 | Cooling System, Air Intake and Exhaust, Fuel Supply System, Belts and Drive Pulleys |
| Torque Converter | 385-386 | Hydraulic System (Oil Pump, Control Valve, Oil Cooler, Oil Cooler Thermal Bypass Valve, Clutch Cut-Off Solenoid Valve) |
| Dampener Drive | 387-392 | Elements |
| Steering System | 393-434 | Secondary Steering, Hydraulic System |
| Service Brakes | 435-472 | Active Elements, Controls Linkage, Hydraulic System |
| Park Brake | 473-480 | Active Elements, Controls Linkage |
| Electrical Systems | 481-528 | Batteries, Support, And Cables, Alternator, Regulator and Lighting System Wiring, Lighting System, Wiring Harness and Switches, System Controls |
| Frame, Chassis, or Support Structure | 529-542 | Frame Installation, Frame Bottom Guards, Chassis Weights |
| Operator's Station | 543-614 | Removal and Installation, Operator Enclosure, Seat and Seat Belt, Heating and Air Conditioning |
| Sheet Metal and Styling | 615-620 | Grille and Grille Housing |
| Loader | 621-674 | Buckets, Controls Linkage, Frames, Hydraulic System |
| Dealer Fabricated Tools | 675-684 | JT38000 Differentail Lifting Tool, JT38001 Jacking Tool, Axle, JT38002 Yoke Holding Tool, JT38003 Rolling Drag Torque Bar, Liner Holding Tool, JT38028 Hydraulic Valve Removal Tool |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Slow idle for 644D | 900 ± 25 rpm | p. 3 |
| Cap Screw Torque | 410 ± 40 N·m (300 ± 30 lb-ft) | p. 55 |
| Front and Rear Engine Support Mount Cap Screws | 231 N·m (170 lb-ft) | p. 317 |
| Flange Nuts (T) | 46 N-m (34 lb-ft) | p. 672 |
| Wheel Retainer Cap Screws Torque | 410 ± 40 N-m (300 ± 30 lb-ft) | p. 29 |
| Differential Carrier Bearings Preload | 0.05-0.10 mm (0.002-0.004 in.) | p. 74 |
| 444D | ||
| Engine Horsepower (SAE hp) | 90 SAE hp (67 kw) | p. 19 |
| Hydraulic System Relief Pressure | 2250-2450 psi (15 514-15 895 kPa) | p. 20 |
| 544D | ||
| Engine Horsepower (SAE hp) | 115 SAE hp (86 kw) | p. 22 |
| 644D | ||
| Engine Horsepower (SAE hp) | 155 SAE hp (116 kw) | p. 25 |
| 544D, 644D | ||
| Hydraulic System Relief Pressure | 2625-2750 psi (18 099-18 960 kPa) | p. 26 |
John Deere 444D, 544D, 644D Common Problems This Manual Covers
John Deere 644D hydraulic system won't reach full pressure, loader arms lift sluggishly
Check the hydraulic system relief pressure at the pump outlet; on 544D and 644D models it should read 2625-2750 psi (18 099-18 960 kPa) per page 26. If pressure reads low, inspect the relief valve for scoring and check the pump drive coupling. Verify reservoir oil level and inspect the suction screen for restriction before condemning the pump.
Manual Section: General p. 26Engine won't start or cranks slowly in cold weather after sitting overnight
Bleed the fuel system per the procedure on page 334 if the engine was run dry or filters were changed recently. Check battery terminals for corrosion and verify slow idle speed; on 644D models slow idle should be 900 ± 25 rpm per page 3. Test the glow plug or ether start system if equipped before condemning the injection pump.
Manual Section: Fuel System Bleeding and Component Replacement p. 334Wheel loosens or lug nuts back off after reinstallation, wobble at highway speed
Torque the wheel retainer cap screws to 410 ± 40 N·m (300 ± 30 lb-ft) as specified on page 55, working in a star pattern across the wheel. Inspect the wheel hub and rim mounting surfaces for rust, cracks, or damage before reinstalling. Replace any stretched, corroded, or deformed cap screws rather than reusing them, and recheck torque after initial operation.
Manual Section: Wheels p. 55Differential leaks oil at the housing seam, oil level drops noticeably between service changes
Test the differential housing with the air and oil leak procedure; pressurize and check for bubbles at seams and seals. Inspect carrier bearing preload, which should measure 0.05-0.10 mm (0.002-0.004 in.) per page 74, since excessive play accelerates seal wear. Replace the housing gasket and reseal with fresh sealant before refilling.
Manual Section: Differential Drive TestingEngine overheats or runs hot during heavy loader work in warm weather
Check thermostat operation; verify it begins to open at 79-83°C (175-182°F) as listed on page 318, and replace it if stuck closed or opening late. Inspect the radiator and fan shroud for debris buildup, and adjust the fan belt tension per the procedure on page 365. Flush the cooling system if coolant is discolored before refilling to capacity.
Manual Section: Cooling System Maintenance p. 365Frequently Asked Questions
What are the torque specifications for John Deere 544D transmission bolts?
The torque specifications for John Deere 544D transmission bolts vary by component. For Clutch Plate Nuts, the torque is 19–24 N·m (14–18 lb-ft). Transmission Housing Cover Cap Screws, Transmission Oil Pump Cap Screws, and Transmission Control Valve Cap Screws all have a torque specification of 35–43 N·m (26–32 lb-ft). p. 183
What is the recommended engine oil drain interval if the fuel sulfur content exceeds 0.5 percent for John Deere loaders?
If the fuel sulfur content exceeds 0.5 percent, the engine oil drain interval must be reduced by 50 percent (to 100 hours). It is recommended to use fuel with less than 1.0 percent sulfur, and preferably less than 0.5 percent sulfur. p. 35
What are the bore and stroke dimensions for the John Deere 444D loader engine with Pin 511477-?
For the John Deere 444D loader engine with Pin 511477-, the bore and stroke dimensions are 4.19 x 4.33 inches (106 x 110 mm). The piston displacement for this configuration is 3.59 cubic inches (5.833 L). p. 19
What is the maximum steering system pressure for the John Deere 444D loader?
The maximum steering system pressure for the John Deere 444D loader is 2400–2500 psi (16 550–17 240 kPa) (165–172 bar) at fast idle. p. 20
What format is this John Deere 444D, 544D, 644D manual in?
Immediate download of the complete 684-page searchable Repair Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Is this John Deere 444D, 544D, 644D Repair Manual printable?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Can I find hydraulic circuit diagrams in this John Deere 444D, 544D, 644D?
Full hydraulic system diagrams are included, covering circuits, valve locations, and hydraulic component specs for the John Deere 444D, 544D, 644D.
