TC30 mower blade torque

[flaredaisi3s]

I'm fixing up my New Holland TC30 tractor. It has a 915 mid-mount mower deck that's 72 inches wide. I just changed the blades and cleaned the parts that spin, after mowing through some rough, rocky ground near Lancaster.

I put everything back together, but I'm not sure how tight the blade bolts should be. I looked in the manual but didn't find a clear answer. I don't want to make them too tight and damage the bearings I just replaced.

If anyone knows the right torque for this setup, I'd be really thankful for the help.

 

[Eastbound]

When it comes to the blade bolts on the 915 deck, you'll generally want to torque them to about 70–90 ft-lbs. Be sure to use a torque wrench to prevent putting too much stress on the bearings

 

[P1nacolad4]

I'm fixing up my New Holland TC30 tractor. It has a 915 mid-mount mower deck that's 72 inches wide. I just changed the blades and cleaned the parts that spin, after mowing through some rough, rocky ground near Lancaster.

I put everything back together, but I'm not sure how tight the blade bolts should be. I looked in the manual but didn't find a clear answer. I don't want to make them too tight and damage the bearings I just replaced.

If anyone knows the right torque for this setup, I'd be really thankful for the help.

If you don't have a torque wrench, the general idea is to get it very tight but not so tight that you risk stripping the bolt or snapping it off.
I always give it a good crank with a long wrench and then put a little bit of thread locker (like blue Loctite) on the threads. It's a great way to make sure the vibration from mowing doesn't cause the bolt to back out

 

[n_h_l_david25]

I'm fixing up my New Holland TC30 tractor. It has a 915 mid-mount mower deck that's 72 inches wide. I just changed the blades and cleaned the parts that spin, after mowing through some rough, rocky ground near Lancaster.

I put everything back together, but I'm not sure how tight the blade bolts should be. I looked in the manual but didn't find a clear answer. I don't want to make them too tight and damage the bearings I just replaced.

If anyone knows the right torque for this setup, I'd be really thankful for the help.

I think @bluefieldwrench61's suggestion is generally too low that your bolts might loosen quickly. The common and recommended spec is actually 150-180 ft-lbs. And since you just replaced the bearings, I recommend aiming for the lower end, around 150 ft-lbs, with a verified torque wrench. Use new lock washers or a bit of thread locker on those bolts, and then check them again after a couple hours of mowing. This spec will keep your blades secure without putting excessive stress on your new bearings.