* Model variations: John Deere 850 tractors came in many variations with different engines. The cylinder head torque specs will vary depending on the engine model.
* Safety: Providing incorrect torque specs could lead to engine damage.
* Professional advice: It's essential to get the correct information from a trusted source.
How to Find the Correct Information:
1. John Deere Service Manual: This is the most reliable source for your tractor. You can find it through your local John Deere dealer or online retailers.
2. John Deere Website: Search their website for your specific tractor model. They may have downloadable manuals or resources.
3. John Deere Dealer: Contact a John Deere dealer in your area. They can provide you with the correct torque specs based on your tractor's serial number.
Remember: Always follow the manufacturer's recommended torque specs. Over-tightening or under-tightening cylinder head bolts can lead to serious engine damage.