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From the backhoe manual general spec for M12 is 57-66 ft.lbs.

I know 50mm will fit and I have ordered 60mm to see how far the threads go. I figure the first 5-7 mm are damaged so if I go 5mm or more threads further I can be sure to get the strength I need.

Kubota told the dealer that they are suppose to be 45mm long. The ones in there were 35mm.

No, they are 12MM and there are four that surround the axle as it goes through the backhoe sub-frame on each side. I found today that 50MM ones thread in and I have ordered 60MM to replace the 35MM that are there. But I still would like to know what is suppose to be there.

Was doing routine maintenance and found many all of the bolts that go through the backhoe sub-frame into the rear axle had loosened/stripped/fallen out. I pulled one and noticed it seemed way too short to go through the sub-frame and into the outer rear axle housings. They are 12MM x 1.5 by...

New here. I have a B3300SU and am doing the 50 hour service. I am changing the HST and hydraulic filters. The manual is a bit confusing. Do I need to drain the oil to do this? What happens if I don't?