1.‐ TAG AXLE STATIC (LOAD APROX. 60 TN GVW): the TAG axle dosn´t move, dosn´t have turning movement and keeps static on LH side.
Straight axle whit bent steering Wheel
Tag axle turns more for RH side and less on LH side.
When TAG axle is operating we lose traction on the second traction axle and it happened very often in mining operation.
Base top axle deformed.
Big issue is that when the truck is not moving the side cylinders are operating and an hydraulic sound shows. This action moves all the trucks from on side to another including load.