Allied Systems W8L Service Manual page 66

Electronic Controls
Sequence of Operation - BRAKE-OFF
BRAKE-OFF is achieved by pushing the control lever
to the left of the BRAKE-ON position. This position is
detented and the control lever must be moved manually
to return it to the neutral position. The bypass valve closes
as the accumulator valve opens. Brake pressure increases
as the control lever moves toward to the detented position,
when full release is achieved.
3 - 18
Figure 3-13 Hydraulic System, Electronic Controls - BRAKE-OFF
WARNING
BRAKE-OFF is not intended for inching,
as loss of the load can occur.