John Deere GS25, GS30, GS45, GS75, HD45, HD75 Mowers Technical Manual

This technical manual provides comprehensive service information for John Deere GS25, GS30, GS45, GS75, HD45, and HD75 commercial walk-behind mowers. Ref: TM1598

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Document Details

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Document Number / Seller:
29010 / Deborah Rogers
File Size:
22.59 MB
File Type:
PDF
Language:
English
Pages:
344
Printable:
Yes
Category:
Mower
Last updated / verified
Oct 4, 2025

Models Covered & Key Technical Specifications

John Deere GS25, GS30, GS45, GS75, HD45, HD75 Mowers Technical Manual: John Deere GS25, GS30, GS45, GS75, HD45, HD75 Mowers (TM1598)

Covers all GS and HD models | Technical Manual Segment. Engine Specifications: 9.3 to 12.7 kW power output across the model range. Transmission: Dana 5-speed with reverse for gear models; Eaton 778 for hydrostatic. Mower Decks: Available in 36, 48, and 54-inch fabricated steel decks. Fuel Tank Capacity: 19 L (5.0 U.S. gal.) ensures ample operation time. Weight: Base units range from 83.5 Kg (184 lb) to 87.4 Kg (193 lb) without deck. Drive Wheels: 330 x 165 mm (13 x 6.5 in.) for gear models.

Professional Workshop Service Manual & Technical Specifications

John Deere GS25, GS30, GS45, GS75, HD45, HD75 Mowers Technical Manual: John Deere GS25, GS30, GS45, GS75, HD45, HD75 Mowers (TM1598)

Product-Line: Commercial Walk-Behind Mowers / Component-Focus: Engine and Drivetrain Logic / Service-Level: Comprehensive Documentation. Assessment-Element Technical-Path Framework
Engine Power Output Variable horsepower ratings from 9.3 to 12.7 kW. Specifies performance metrics.
Transmission Types Features both Dana 5-speed gear and Eaton 778 hydrostatic transmissions. Covers different drive systems.
Deck Size Options Offers deck sizes of 36, 48, and 54 inches for versatile application. Addresses varying cutting requirements.
Fuel Capacity Equipped with a 19 L (5.0 U.S. gal.) fuel tank for extended usage. Details fuel storage for operation.
Unit Weight Ranges from 83.5 Kg (184 lb) to 87.4 Kg (193 lb) without the mower deck. Provides base unit mass specifications.
Drive Wheel Dimensions Utilizes 330 x 165 mm (13 x 6.5 in.) drive wheels on gear models. Specifies wheel size for traction.

Factory specifications are documented for all models, covering engine performance, transmission details, and mower deck options. The manual details systems like the cooling, lubrication, and fuel systems, providing operational insights. Specific maintenance procedures and troubleshooting guides are included to address potential issues. The document contains comprehensive information to ensure proper operation and maintenance of your John Deere equipment.

Engine rebuild procedures are documented for all models, detailing the processes for disassembly, assembly, and inspection of key components. Drivetrain specifications are addressed in sections covering both gear and hydrostatic transmissions, including relevant adjustments. Reassembly procedures are specified for all major mechanical assemblies, ensuring correct installation and function. Service intervals are documented for routine maintenance to prolong the life of the equipment. The manual also provides detailed troubleshooting charts for common problems encountered with the engine and drive systems.

Torque specifications for critical fasteners are provided to ensure proper and safe assembly, contributing to corrosion joint prevention and overall structural integrity. A thorough table of specifications covers everything from engine displacement to dimensions and tire pressures.

Organized into dedicated modules for easy navigation, the manual provides a clear breakdown of the mower's systems and components. The Table of Contents lists all sections, allowing users to quickly find information on specifications, component locations, theory of operation, troubleshooting, tests, adjustments, and repair procedures. Key sections include detailed instructions for engine removal and installation, fuel system maintenance, and electrical system diagnostics. The manual is an essential resource for any owner or technician working on these John Deere mowers.

FAQ

What are the **standard** engine specifications for these John Deere mowers? keyboard_arrow_down

9.3 to 12.7 kW is the typical engine horsepower range across the GS25, GS30, GS45, GS75, HD45, and HD75 models.

What is the **fuel** tank capacity for these mower models? keyboard_arrow_down

19 L (5.0 U.S. gal.) is the standard fuel tank capacity, allowing for extended operation between refueling.

Can you provide the **typical** weight range for these John Deere mowers? keyboard_arrow_down

Base units weigh between 83.5 Kg (184 lb) and 87.4 Kg (193 lb) without the mower deck attached.

What **transmission** options are available for these mower models? keyboard_arrow_down

The mowers are available with either a Dana 5-speed gear transmission or an Eaton 778 hydrostatic transmission, depending on the specific model.

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Reviews (4)

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Rated 5 out of 5 stars
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The troubleshooting charts are a lifesaver. The download process was also smooth and quick!
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I had a question about the electrical schematics and received a response in no time. Highly recommend!
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This manual is incredibly detailed and easy to navigate. Perfect for both beginners and pros!