KUHN GMD28 User Manual

92 pages

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Original instructions

KN226BGB_A

Read carefully before starting the machine

Operator's manual

Disc mower

---A1025-70B00001 > ---A1025-70B99999

GMD24-GMD28 / HD

KN226BGB_A

- English - 07-2019

*KN226BGB_A*

Table of Contents

Questions and Answers:

D
Donna SmithAug 9, 2025
How to fix uneven stubble with KUHN GMD28 Farm Equipment?
- L
  Logan TuckerAug 9, 2025
  If you observe uneven stubble while using your KUHN Farm Equipment, it could be due to several reasons. The knives might be dull or broken, in which case you should replace them. Also, check if the knives are installed correctly, ensuring the arrow on the knife's upper face points in the disc's direction of rotation. Insufficient disk speed can also cause this issue, so check the belt tension. Finally, ensure that the PTO speed is adequate, and increase it to 540/min if it is too low.
D
daniellereyesAug 19, 2025
What to do if soil builds up in front of the cutterbar on my KUHN GMD28?
- T
  Travis NguyenAug 20, 2025
  If you find soil building up in front of the cutterbar of your KUHN Farm Equipment, it may be due to very wet working conditions. Adjust the main frame height with regards to the ground and consider fitting raised skid shoes. Alternatively, there might be too much cutterbar down pressure, in which case you should fit a compensating spring.
L
Lauren SimonAug 29, 2025
Why is the ground contour adaptation bad on my KUHN Farm Equipment?
- J
  Jerry SteeleAug 30, 2025
  Poor ground contour adaptation with your KUHN Farm Equipment can arise from several factors. First, ensure that the main frame is set correctly by adjusting its height relative to the ground. Excessive ground speed can also be a cause, so reduce your speed. Check the condition of the cutter bar pivot bushes for wear or seizure, and replace them if necessary. Lastly, a blocked hydraulic cylinder can cause this, so set the hydraulic valve in a floating position.

KUHN GMD28 Specifications

General

Brand	KUHN
Model	GMD28
Category	Farm Equipment
Language	English

Summary

Safety Instructions and Precautions

Description of Symbols Used

Explains hazard, warning, and information symbols used in the manual.

General Safety Instructions

General safety guidelines and precautions for operating and maintaining the machine.

Safety Decals Location and Description

Road Safety Equipment and Recommendations

Incorrect Use of the Machine

Highlights improper usage scenarios that can lead to hazards or damage.

Technical Specifications and Components

Technical Specifications

Machine Setup and Coupling Procedure

Coupling and Uncoupling

Details the procedures for attaching and detaching the mower to the tractor.

Preparing the Tractor

Primary PTO Shaft

Guidelines for installing and preparing the PTO shaft for safe and efficient operation.

Adjusting the Machine

Transport and Road Safety Guidelines

Putting the Machine into Transport Position

Steps to correctly position the mower for safe transport.

Conformity with Road Regulations

Operating the Mower and Adjustments

Putting the Machine into Work Position

Procedure for moving the mower from transport to working configuration.

Adjustments in Working Position

Machine Use

Guidelines and precautions for operating the mower during work.

Routine Maintenance and Storage Procedures

Frequency Chart

Lubrication

Provides detailed guidance on greasing and oiling all machine components.

Maintenance Procedures

Key procedures for maintaining machine components and ensuring operational readiness.

Knife Replacement

Step-by-step instructions for safely replacing worn or damaged cutting knives.

Storage Procedures

Troubleshooting Common Issues

Uneven Stubble

Addresses issues causing uneven cutting of crops and provides solutions.

Soil Build Up in Cutterbar

Bad Ground Contour Adaptation

Insufficient Cutterbar Ground Clearance

Appendix: Load Calculations

Calculating the Load on an Axle

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