Do the forks still have up, down, and tilt control? If so the hydraulic pump is still working then. You need to verify that the parking brake is fully releasing allowing the Hydrostatic drive to operate the drive motors. Check the stupid stuff, make sure nothing is blocking the release like a tape ball, rag, and what not. Verify the park brake sensor is functioning correct too. Also make sure the seat belt and the sensor in the seat are working becuase that will also prevent a forklift from moving too.
Of all people!! <S> (OFWG)
Mast functions strong, at 90% if I had to guess (not an operator)
I will look into the physical release as it may be near the drive motors, which is a tight fit for my fat ace. However I checked resistance and v from the fuze all the way down to chasis ground via wiring diagram, and everything checks out minus a few already replaced butts. I fear it may be within the harness inside the tubing. It does have electrovalves for F and R which are a bit above me but the relays and connectors are right. With the drive motors and EV park brake its hard to tell if its actually working as it wont free-roll. But according to the juice and relays, everything is good.
PS I did notice it has two pumps, as I'm learning on SLs, they have a tandem and a charge pump. Was curious if it was the same as there are 2 pumps.
Im 6 weeks into the job from barely ever turning a wrench other than basic maintenance lol. Not loving the FLs so far TBH