Australian Off Road in consultation with hub manufacturers and numerous wheel manufacturers have created a guide for wheel nut settings for your trailer. This guide will cover everything from wheel nut torque settings, wheel nut tightening techniques and patterns to wheel nut tightening service intervals.
If you would like to download a PDF version of this information sheet, please click here.
TIGHTENING OF WHEEL NUTS
To ensure that the wheel is located on the hub properly, please use the following steps to correctly carry out this task:
- Ensure the hub surface is clean from dirt or mud
- Ensure the back of the wheel is clean from dirt or mud
- An impact / rattle gun if used, must only be used to “nip up” the wheel nuts (for speed)
- An impact gun should never be used to achieve the final wheel nut torque setting
- The correct nut torque sequence for the wheel must be used, to correctly and centrally locate the wheel on the hub of the trailer or caravan
- It is imperative that the final wheel nut torque be achieved manually, using a properly calibrated, high quality torque wrench
Please see the table below for the hub manufacturer and wheel manufacturer recommended wheel nut torque settings. The table shows the hub manufacturers maximum torque settings as well as the recommendation by the manufacturer of never going above 80% maximum torque setting. Therefore, if you stay in between the wheel manufacturers torque setting and the 80% maximum torque setting you will have safe wheel operation.
****Example – A 2018 built AOR Quantum Plus with 6 Stud Hubs wheel nut torque setting should be between 200 N.m and 135N.m of torque.
||MANUFACTURER MAX TORQUE
||MANUFACTURER MAX TORQUE @ 80% of MAX
||WHEEL MANUFACTURERS TORQUE GUIDE
|Cruisemaster 6 STUD
||SAE Grade 8
|Cruisemaster 5 STUD
||M14 x 1.5
|Al-ko 5 STUD
||M14 x 1.5
|Al-ko 6 STUD
||M12 x 1.5
***AOR Trailers manufactured before November 2017 used Al-ko Hubs. All trailers manufactured November 2017 to present us Cruisemaster hubs.
WHEEL NUT RE-TORQUE INTERVALS
Initially when you take delivery of the trailer, the wheel nuts need to be checked after 100km, 300km and 1000km just for the settling in period. For off-road and abnormal conditions maintenance intervals will need to be more frequent and daily visual inspections are recommended.