I used grade 10 from auto zone. Should I have used the originals? I don’t remember if I used loctite or not. Is loctite necessary ?
There is no "grade 10" in the SAE bolt grade system. Some metric bolts are CLASS 10.9 per the folllowing specifications:
Proof Load (MPa): 830Min. Yield Strength (MPa): 940Min. Tensile Strength (MPa): 1040
- Head Marking: 10.9
- Material: Alloy steel, quenched and tempered
- Size Range: 5-mm to 100-mm
Did you mean class 10.9??? The Deere part is a CH19101 BOLT which is an M8 x 45 metric bolt and most likely is a class 10.9... How were the bolt heads marked on the bolts you removed??
Note: a metric class 10.9 is roughly equivalent to the strength of a Class 8 SAE bolt...