Axle Bolt torque

[Blimphauler]

Let's try this again! Axles replacement question: I've got a '72 dual-axle trailer, and recently received my new axles from Andy. Any idea what the recommended torque is for the axle bolts?

[clancy_boy]

Originally Posted by Blimphauler

Let's try this again! Axles replacement question: I've got a '72 dual-axle trailer, and recently received my new axles from Andy. Any idea what the recommended torque is for the axle bolts?

That would be a question I would ask the dealer. That information should have been in the installation instructions included with the axle. Please use grade 8 bolts and nuts with lock washers.

[Blimphauler]

I agree; I don't want to guess. I should have asked earlier than the day I plan on installing the axles! I got new axles, brakes, hardware (Grade 8), and shocks; all of which arrived w/o instructions, hence the perusal of past posts. At this point I think I'll get everything installed, and wait on the final torquing until I get the answer....

[Shacksman]

Dexter axles use 5/8" bolts and are torqued to 120-155 as per their chart.
Suspension Maintenance for Trailers

[barts]

Originally Posted by Blimphauler

Let's try this again! Axles replacement question: I've got a '72 dual-axle trailer, and recently received my new axles from Andy. Any idea what the recommended torque is for the axle bolts?

These bolts are in single shear; they're 5/8" grade 8 fine thread: far, far stronger than the plate to which the axles are bolted. Since the loading direction is such that the bolt threads are never subject to any dynamic load, the torque values are not critical - they just need to be good and tight.

Absent official specs, I'd oil the threads and torque to 100 ft-lbs, or as tight as you can get them with a 12" wrench absent a proper torque wrench. Torque values w/ lockwashers are always approximate - but they're required in this application as the transverse loading does tend to loosen things.


- Bart

[Inland RV Center, In]

Originally Posted by Blimphauler

I agree; I don't want to guess. I should have asked earlier than the day I plan on installing the axles! I got new axles, brakes, hardware (Grade 8), and shocks; all of which arrived w/o instructions, hence the perusal of past posts. At this point I think I'll get everything installed, and wait on the final torquing until I get the answer....

100 to 120 foot pounds is far more than adequate.

That's for both the grade 8, 1/2 inch and 5/8 bolts.

For the shocks, just adequately tight.

Andy