1984 John Deere 401D Tractor Technical Manual

This manual details the 401D tractor, covering engine, transmission, axles, and hydraulic systems. Includes specifications and procedures for maintenance and repair. Part Number TM-1271.

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Document Details

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Document Number / Seller:
28821 / Steven Williams
File Size:
258.48 MB
File Type:
PDF
Language:
Pages:
1404
Printable:
Yes
Category:
Tractor
Last updated / verified
Feb 27, 2025

Models Covered & Key Technical Specifications

John Deere 401D Tractor Technical Manual (TM-1271) – 1984 Covers engine, transmission, axles, and hydraulic systems | Series Tractor Archive.

  • Published Specifications: Unit Dimensions: 22 ft. 7 in. (6.90 m) overall length establishes the tractor's physical size parameters.
  • Measured Clearance Data: For optimal operation, 1 ft. 5 in. (430 mm) ground clearance under the front axle defines the operational limit Framework.
  • Integral Drive Shaft: The transmission drive shaft signifies the power transfer component Threshold.
  • Operational PTO Specifications: For continuous power, 52 mm (2.03 in.) free length on the PTO brake assembly return spring ensures proper function Standards.
  • Fundamental Engine Specs: The John Deere 4-cylinder diesel engine requires 160 lb-ft (217 N.m) maximum torque @ 1300 rpm Protocol.
  • Universal Lubrication Data: For maximum filter life, sediment and water should not be more than 0.10 per cent Bounds.

Professional Workshop Service Manual & Technical Specifications

John Deere 401D Industrial Tractor Manual: Precision Maintenance: John Deere 401D Industrial Tractor (1984) Technical-Guide

Equipment-Series: John Deere 401D // Asset-ID: TM-1271 / Tractor Logic // Procedure-Type: Technical-Manual.

Maintenance hierarchies are structured into

Assessment-Element Parameters Calibration-Data
PTO Specifications Free length (approximate): 98.5 mm (3.88 in.) Test length at 176 ± 18 N (130 ± 13 lb force): 45.5 mm (1.79 in.)
Mid Mount PTO Quill Free length (approximate): 24.5 mm (0.96 in.) Test length at 133 ± 16 N (30 ± 3.5 lb force): 16.26 mm (0.64 in.)
Shifter Shafts Free length (approximate): 24 mm (0.96 in.) Test length at 120 to 147 N (27 to 33 lb force): 16 mm (0.64 in.)
Rockshaft Load Control Arm Free length (approximate): 89 mm (3.50 in.) Test length at 130 ± 13 N (29 ± 3 lb force): 154 mm (6.07 in.)
Countershaft Bearing Support Free length (approximate): 47 mm (1.87 in.) Test length at 280 to 343 N (63 to 77 lb force): 38 mm (1.51 in.)
Differential Assembly Housing cover cap screw torque: 47 N-m (35 lb-ft) Differential preload: 0.05 to 0.13 mm (0.002 to 0.005 in.)

Parts identification is covered for engine, transmission, axles, and suspension systems. Removal and installation procedures are documented for various components, including the clutch housing, gearshift levers, and PTO assemblies. Technical specifications are provided for wheel mounting, tire pressure, and various torque values throughout the drivetrain. Factory specifications are documented for PTO components, differential assemblies, and axle shafts. Engine rebuild procedures are documented for the John Deere 4-cylinder diesel engine, including specifications for bore, stroke, and displacement. The manual also details hydraulic system components, such as the transmission oil pump, pressure relief valve, and selective control valve.

This manual documents torque specifications for various components to ensure proper oscillation integrity.

FAQ

What are the **proper** clearance measurements for the axle shaft? keyboard_arrow_down

0.15 mm (0.006 in.) drive shaft preload is required for the axle shaft.

Specify the **standard** torque specifications for the wheel hub assembly. keyboard_arrow_down

47 N-m (35 lb-ft) cap screw torque is standard for the wheel hub assembly.

What is the **necessary** safety precautions when working with tires? keyboard_arrow_down

Failure to follow proper procedures when mounting a tire on a wheel or rim can produce an explosion which may result in serious bodily injury. Always deflate the tire completely by removing the valve core before demounting.

Calculate the **recommended** lubrication requirements for the transmission. keyboard_arrow_down

47L (12 gals) of oil is the transmission capacity and should be filled to the dipstick level with the recommended oil as per Section 1, Group IV.

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Reviews (5)

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I appreciated the fast response when I had questions about the manual. Excellent customer service!
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The illustrations helped a lot with understanding the hydraulic system. Worth every penny!
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This manual is a must-have! The diagrams and detailed instructions made my repairs so much easier. Highly recommend!
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This manual covers everything you need to know about the 401D. The engine section was particularly informative. Very satisfied!
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The download process was smooth, and I received the manual quickly via email. Great support!