KUHN GMD350 User Manual (English)

Questions and Answers:

C
Casey HopkinsJul 31, 2025
How to fix uneven stubble with KUHN Lawn Mower?
- M
  Melissa HintonJul 31, 2025
  Uneven stubble can occur for several reasons. It might be due to dull or broken knives, in which case you should replace them. Another cause could be knives not installed correctly; ensure the arrow on the knife upper face points in the disc's direction of rotation. Insufficient disk speed, caused by belt tension, or too low PTO speed, correct this by increasing speed to 540 min-1. Finally, a cutter bar pitch angle that is too high can also cause this issue, so reduce the angle.
C
Chelsea Clements MDAug 5, 2025
What to do if stubble is too long with KUHN Lawn Mower?
- T
  Timothy JordanAug 5, 2025
  If the stubble is too long when using your KUHN Lawn Mower, it could be due to an incorrect cutter bar pitch angle; modify the pitch angle using the top link. Alternatively, the machine might be too light, so adjust the suspension hydraulic circuit and check the frame position.
V
Victor BridgesAug 9, 2025
How to prevent soil build up in front of the cutterbar on KUHN Lawn Mower?
- M
  mckeekyleAug 9, 2025
  Soil build up in front of the cutterbar on your KUHN Lawn Mower can be caused by too much cutterbar down pressure. To resolve this, adjust the suspension hydraulic circuit. It can also happen in very wet working conditions; in this case, adjust the main frame height with regards to the ground.
W
Wayne ThompsonAug 14, 2025
What to do if KUHN Lawn Mower cutter bar pivots rearwards?
- Y
  yortizAug 14, 2025
  If the cutter bar pivots rearwards during the first headland turn maneuver with your KUHN Lawn Mower, it might be because the valve actuator is still engaged in the cam. To fix this, lower the chassis prior to raising it for positioning the hitch pins at 450 mm (1’5’’) from the ground. Alternatively, adjust the cam position.
R
ryan20Aug 18, 2025
Why KUHN GMD350 Lawn Mower has bad ground contour adaptation?
- T
  Taylor RuizAug 18, 2025
  Poor ground contour adaptation with your KUHN Lawn Mower can stem from several factors. The main frame setting may be incorrect; adjust the main frame height with regards to the ground. Excessive ground speed can also be a factor, so reduce your speed. Additionally, a blocked hydraulic cylinder can cause this; set the hydraulic valve in a floating position. Incorrect mowing unit floatation may be the reason, so adjust the suspension hydraulic circuit. Lastly, check the condition of the cutter bar pivot bushes for wear or seizure and replace if necessary.
V
vperkinsAug 22, 2025
Why does KUHN GMD350 Lawn Mower safety breakback release too frequently?
- J
  Jason CarterAug 22, 2025
  Too frequent safety breakback release on your KUHN Lawn Mower is often due to insufficient spring washer compression. Increase the spring washer compression to resolve this issue.
M
michelle56Aug 26, 2025
What causes incorrect mowing unit positioning on KUHN Lawn Mower?
- A
  Arthur WrightAug 27, 2025
  Incorrect mowing unit positioning with regards to the tractor when placed in working position on your KUHN Lawn Mower is caused by not using the tractor valve double acting position to lower the mowing unit. Use the tractor double acting position to lower the mowing unit.

KUHN GMD350 Specifications

General

Brand	KUHN
Model	GMD350
Category	Lawn Mower
Language	English

Summary

Dear Owner

Designated use of the machine

Specifies the intended purpose for which the machine was manufactured.

Identification of the machine

Front view

Visual representation of the machine from the front.

Rear view

Visual representation of the machine from the rear.

Model identification plate

Details on the machine's type and serial number for identification.

Optional equipment

Lists available optional accessories that can be fitted to the machine.

Safety

Description of symbols used in this document

Explains the meaning of various symbols used throughout the manual.

Safety instructions

General safety guidelines and precautions for operating the machine.

Precautions when driving on public roads

Safety measures and regulations for road transport.

Precautions when coupling

Safety procedures for attaching the machine to the tractor.

PTO shaft

Safety guidelines related to the power take-off shaft.

Waste disposal

Guidelines for environmentally responsible disposal of waste.

Precautions for maintenance and repair work

Safety measures before performing maintenance or repairs.

Projection of stones and foreign objects

Warnings and precautions regarding ejected objects during operation.

Precautions for machine use

Safety guidelines specific to operating the machine.

Location and description of safety decals on the machine

Identifies the placement and meaning of safety warnings on the machine.

Description of safety decals

Explains the meaning of specific safety warning decals.

Road safety equipment and recommendations

Details on road safety equipment and usage recommendations.

Machine specifications

Description and glossary

Provides definitions and a glossary of machine components.

Technical specifications

Details key technical data, dimensions, and weights of the machine.

Required equipment

Lists the essential equipment necessary for the machine's operation.

Sound levels

Information on the acoustic pressure levels generated by the machine.

Putting into service

Description of control elements

Identifies and explains the function of the machine's control elements.

Coupling and uncoupling

Procedures for attaching and detaching the machine from the tractor.

Preparing the tractor

Steps to prepare the tractor for coupling with the machine.

Pressurizing the hydraulic ground pressure circuit

Instructions for setting up the hydraulic ground pressure system.

Hydraulic connections

Details on connecting the hydraulic hoses to the machine.

Primary PTO shaft

Guidelines for correctly adjusting and using the PTO shaft.

Adjusting the machine

Procedures for making adjustments to the machine's components.

Uncoupling the machine

Steps for safely detaching the machine from the tractor.

Instructions for transport

Putting the machine into transport position

Steps to safely prepare the machine for transportation.

Conformity with the road regulations

Ensures compliance with highway code regulations for road use.

Instructions for work

Putting the machine into work position

Procedures for setting up the machine for operation.

Adjustments in working position

Adjustments needed for optimal performance during operation.

Machine use

Guidelines and precautions for operating the machine in the field.

Headland turn maneuvers

How to perform turns at the headlands during operation.

Machine safety

Safety procedures and considerations when operating the machine.

Optional equipment

Chain stroke limiter

Installation and adjustment of the chain stroke limiter.

Outer guard hydraulic locking

Operation of the hydraulic outer guard locking system.

Side deflector

How to fit and use the side deflector.

1000 min-1 drive kit

Information on the drive kit for 1000 RPM PTO.

Adaptation parts

Details on parts for adapting the machine to different hitches.

Maintenance and storage

Frequency chart

Schedule for routine maintenance tasks like lubrication and oil changes.

Lubrication

Procedures for lubricating various parts of the machine.

Grease

Specific greasing points and procedures for the machine.

Oil

Locations for oiling moving parts and pivot points.

Hydro-pneumatic accumulator

Maintenance and depressurization of the hydro-pneumatic system.

Cutterbar

Maintenance procedures for the cutterbar, including oiling.

Inspection of knives and securing elements

How to inspect and replace knives and their fasteners.

Knife replacement

Detailed steps for replacing worn or damaged knives.

Disc replacement

Procedures for replacing worn or damaged discs.

Spring plate replacement

Instructions for replacing spring plates on discs.

Disc with cone

Maintenance for discs with conical covers.

Storage

Guidelines for storing the machine at the end and start of seasons.

Trouble shooting guide

Uneven stubble

Addresses issues causing uneven cutting results.

Soil build up in front of the cutterbar

Solutions for soil accumulation in front of the cutterbar.

Bad ground contour adaptation

Remedies for poor adaptation to ground contours.

Stubble too long

Troubleshooting steps for excessively long stubble.

Too frequent safety breakback release

Addresses issues with the safety breakback mechanism.

Interference between tractor and front guard

Solutions for interference issues between tractor and front guard.

Incorrect mowing unit positioning with regards to the tractor when placed in working position.

Correcting mowing unit positioning relative to the tractor.

Appendix

Calculating the load on an axle

Methodologies for calculating axle loads and weight distribution.

Define the total weight, axle loads, tyre capacity and minimum additional mass

Steps to determine essential weight and capacity parameters.

Limited warranty

These conditions are subject to the following exceptions

Lists conditions and parts not covered by the warranty.

The customer will be responsible for and bear the costs of

Outlines customer responsibilities for maintenance and costs.

The Limited Warranty is dependent on the strict observance of the following conditions

Details requirements for warranty validity and claims.

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56 pages

KUHN GMD350 User Manual

Table of Contents

Questions and Answers:

KUHN GMD350 Specifications

Summary

Dear Owner

Designated use of the machine

Identification of the machine

Front view

Rear view

Model identification plate

Optional equipment

Safety

Description of symbols used in this document

Safety instructions

Precautions when driving on public roads

Precautions when coupling

PTO shaft

Waste disposal

Precautions for maintenance and repair work

Projection of stones and foreign objects

Precautions for machine use

Location and description of safety decals on the machine

Description of safety decals

Road safety equipment and recommendations

Machine specifications

Description and glossary

Technical specifications

Required equipment

Sound levels

Putting into service

Description of control elements

Coupling and uncoupling

Preparing the tractor

Pressurizing the hydraulic ground pressure circuit

Hydraulic connections

Primary PTO shaft

Adjusting the machine

Uncoupling the machine

Instructions for transport

Putting the machine into transport position

Conformity with the road regulations

Instructions for work

Putting the machine into work position

Adjustments in working position

Machine use

Headland turn maneuvers

Machine safety

Optional equipment

Chain stroke limiter

Outer guard hydraulic locking

Side deflector

1000 min-1 drive kit

Adaptation parts

Maintenance and storage

Frequency chart

Lubrication

Grease

Oil

Hydro-pneumatic accumulator

Cutterbar

Inspection of knives and securing elements

Knife replacement

Disc replacement

Spring plate replacement

Disc with cone

Storage

Trouble shooting guide

Uneven stubble

Soil build up in front of the cutterbar

Bad ground contour adaptation

Stubble too long

Too frequent safety breakback release

Interference between tractor and front guard

Incorrect mowing unit positioning with regards to the tractor when placed in working position.

Appendix

Calculating the load on an axle

Define the total weight, axle loads, tyre capacity and minimum additional mass

Limited warranty

These conditions are subject to the following exceptions