I have a gc25k that the parking brake is not holding. These items have been replaced with new total source brand parts: brake shoes, parking brake cables, drums, park brake lever, also wheel and master cylinders.

Everything is adjusted to the max and still not holding the unit still at an idle. The cables are pulled down to the max at the lever and lever is also out of adjustment. The shoes have been ran in and properly adjusted as well. I am wondering if the use of aftermarket parts is to blame. All parts and numbers have been double checked to make sure they are right for the application. Also have had same problems on GP25k lifts using the same types of new parts.

Anyone have this before? Thanks in advance for any answers.