To find the engine oil refill capacity for your Farmall 340 tractor, I recommend the following:
1. Check your owner's manual: This is the most reliable source of information. The manual will specify the exact oil capacity for your specific tractor model.
2. Consult a service manual: If you don't have the owner's manual, a service manual for your tractor model will also contain this information.
3. Contact your local Farmall dealer: They have access to the most up-to-date information and can provide you with the correct oil capacity.
Please remember that engine oil capacities can vary depending on the engine type and year of manufacture. Always consult the manufacturer's recommendations to ensure proper maintenance.