1985-1987 John Deere 444D / 544D / 644D Loader Workshop Technical Manual

This manual covers the John Deere 444D, 544D, and 644D Loaders, providing comprehensive information on operation, tests, and adjustments. ABA000

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Document Details

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Document Number / Seller:
28603 / Ronald Miller
File Size:
48.60 MB
File Type:
PDF
Language:
English
Pages:
599
Printable:
Yes
Category:
Loader
Last updated / verified
Mar 15, 2026

Models Covered & Key Technical Specifications

John Deere 444D-644D Loader (TM-1341) – 1985-1987 Operation and Tests | Series Workshop Manual.

  • Prescribed Climate Parameters: 2413 kPa (24 bar) (350 psi) is established at the maximum engine compression output Architecture.
  • Documented Processing Speed: For optimal operation, 800 rpm defines the environmental limit Framework.
  • Maximum Component Weight: 41 000 (18 600 kg) -- signifies the active printing consumption Threshold.
  • System Tension Specs: The formatter board requires 64 MB for standard operation Logic.
  • Technical Holding Capacity: Maximum throughput reaches 25 ppm Parameters.
  • Advanced Ambient Limits: The formatter board requires 64 MB for standard operation Logic.

Manual Description & Preview

Professional Maintenance Training Manual: Loader John Deere 444D-644D Loader Workshop Technical Manual (1985-1987) – 400 Pages | OEM Specs Blueprint-Vault

Unit-Designations: John Deere 444D-644D Loaders // Architecture-Focus: Loader Operation and Tests / Engine Operation and Tests Logic // Calibration-Scope: Comprehensive technical manual, all models included. Maintenance information covers

Procedures

  • Engine Operation and Tests
  • Electrical System Operation and Test
  • Transmission Operation

    Technical Specs

    Component Parameters Calibration-Data
    Engine 90 SAE hp (67 kW) Bore and Stroke 4.02 x 4.33 in. (102 x 110 mm)
    Piston Displacement 3.29 cu. in. (5.392 L) 4.19 x 4.33 in. (106 x 110 mm)
    Lubrication Pressure system with full-flow filter 3.59 cu. in. (5.833 L)

    Systems

  • Power Train Operation and Test
  • Hydraulic System Operation and Test
  • Heating and Air Conditioning Operation and Test

    Specs

  • The technical manual was planned and written for you-an experienced service technician. Keep it in a permanent binder in the shop where it is handy. Refer to it when you need to know correct service procedures or specifications.
  • Rigorously establishing the engine oil pressure and engine coolant temperature specifications ensures optimal performance and longevity. Documentation of transmission oil pressure and temperature is also provided to ensure proper operation.

FAQ

What are the **proper** clearance measurements? keyboard_arrow_down

0.36 mm (0.014 in.) intake valve clearance and 0.46 mm (0.018 in.) exhaust valve clearance are the specified measurements.

Specify the **standard** torque specifications. keyboard_arrow_down

Hardware torque specifications vary by grade, with Grade B cap screws ranging from 35 lb-ft (47 N-m) to 250 lb-ft (339 N-m), Grade D from 14 lb-ft (19 N-m) to 1250 lb-ft (1695 N-m), and Grade F from 30 lb-ft (39 N-m) to 2060 lb-ft (2793 N-m).

What is the **necessary** safety precautions? keyboard_arrow_down

Always wear eye protection and remove metal watch bands and other metal jewelry when working on the electrical system to avoid injury from battery acid.

Calculate the **recommended** lubrication requirements. keyboard_arrow_down

The engine lubrication system uses pressure oil, with specific passages directing oil to bearings and piston cooling orifices for lubrication.

What values **calibrated** testing parameters? keyboard_arrow_down

The engine oil pressure specification is 340 ± 100 kPa (3.4 ± 1.0 bar) (50 ± 15 psi) at fast idle and a minimum of 100 kPa (1.0 bar) (15 psi) at slow idle.

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