Why is the left track on my Cat AP1055D slower than the right?

[USVeteran]

My Cat AP1055D has a slow left track. The right track moves much faster, even with the override switch on.

 

[Polo Ardobie]

A likely cause is uneven hydraulic flow or pressure to the left track circuit, so try checking the left travel motor, hydraulic pressure, and control valve before assuming it’s the override switch.