A lawn mower is an indispensable tool in the garden, but like any technical device, it can break down. The transmission, in particular, is subjected to high loads and can wear out over time. In this article, you will learn everything you need to know about lawn mower transmissions – from how they work and typical signs of a defect to how to replace the transmission.
What is a Lawn Mower Transmission and How Does it Work?
The transmission is the heart of every self-propelled lawn mower. It is responsible for transferring the power of the engine to the wheels, providing propulsion for the mower. The transmission reduces the engine speed while increasing the torque, causing the wheels to turn and move the mower.
Common types of transmissions in lawn mowers include:
- Worm gear: Robust, low-maintenance, but less efficient.
- Bevel gear: Compact, relatively efficient, but more susceptible to wear.
- Belt drive: Simple design, inexpensive, but more maintenance-intensive.
Each type of transmission has its advantages and disadvantages, and the right choice depends on the specific lawn mower model and individual requirements.
Close-up of a lawn mower transmission unit
Signs of a Defective Lawn Mower Transmission
A worn or defective transmission usually manifests itself through various symptoms:
- Unusual noises: Grinding, cracking, or rattling during operation, especially under load.
- Jerky driving: The lawn mower does not move forward smoothly but jerks or stutters.
- Difficulty starting: The engine starts poorly or stalls when the drive is engaged.
- Oil leakage at the transmission: Leaking oil indicates a defective seal or a cracked housing.
If you notice one or more of these symptoms on your lawn mower, it is advisable to inspect the transmission more closely.
“Timely replacement of the transmission can prevent major damage to the lawn mower,” explains engine expert Dr. Ing. Heinz Schmidt in his book “Modern Garden Technology: Lawn Mowers in Focus”.
Replacing a Lawn Mower Transmission: Step-by-Step Guide
Replacing a lawn mower transmission is not rocket science, but it does require some manual dexterity. With the following instructions, you can carry out the repair yourself:
- Preparation: Disconnect the lawn mower from the power supply or remove the spark plug for gasoline mowers.
- Disassembly: Remove the drive shaft, wheels, and transmission housing.
- Replacement: Replace the old transmission with a new, suitable model.
- Assembly: Reinstall the transmission housing, wheels, and drive shaft.
- Test run: Perform a test run to check the functionality of the new transmission.
Tip: Take photos of the individual steps during disassembly to keep track of the correct order during reassembly.
Hands repairing a lawn mower transmission, step-by-step guide context
Costs for a New Transmission and Replacement
The costs for a new lawn mower transmission vary depending on the model and manufacturer. Inexpensive transmissions are available from around 50 euros, while high-quality models can cost up to 200 euros. Replacement in a specialist workshop will incur additional labor costs.
Is Repair Worthwhile?
Whether repairing a defective lawn mower transmission is worthwhile depends on the age, condition, and purchase price of the lawn mower. For older models, a new transmission may exceed the value of the mower. In this case, a new purchase is often more sensible.
Frequently Asked Questions about Lawn Mower Transmissions
Can I change the transmission oil myself?
Yes, on most lawn mower transmissions, an oil change is possible. You can find information on this in the operating instructions for your mower.
Which transmission oil is the right one for my lawn mower?
The manufacturer’s recommendation for the appropriate transmission oil can usually be found in the operating instructions.
How can I extend the lifespan of my lawn mower transmission?
Regular maintenance, such as cleaning the transmission from grass and dirt, as well as timely changing of the transmission oil, contribute to the longevity of the transmission.
Conclusion
The transmission is an important component of the lawn mower that is subjected to high loads. If you notice signs of a defect, prompt repair is recommended. With a bit of manual skill, you can replace the transmission yourself and save costs.
Do you need support with the repair of your lawn mower? Contact us, our experts will be happy to help you!
