66
11921 Slauson Ave.  Santa Fe Springs, CA.  90670  (800) 227-4116  FAX (888) 771-7713
STEP 12 - PRESSURIZE HYDRAULIC SYSTEM
2. To pressurize closing cylinder, 
set control box toggle switches 
to FOLD for 10-15 seconds as 
shown in FIG. 66-2. 
To prevent injury and equipment damage, pressurize hydraulic system before 
removing lower support fi xtures and operating Liftgate.
WARNING
PRESSURIZING LIFTING CYLINDERS 
FIG. 66-1
!
1. To pressurize lifting cylinders, 
set control box toggle switch 
to UP for 10-15 seconds as 
shown in FIG. 66-1. 
PRESSURIZING CLOSING CYLINDER 
FIG. 66-2
NOTE: Liftgate is shipped with Exxon Univis HVI-13 hydraulic fl uid in the hydraulic 
cylinders. This fl uid is suitable for operation in temperature range of -40° F 
to +120° F. If necessary, a different brand or higher viscosity hydraulic fl uid 
may be used. Refer to the CHANGING HYDRAULIC FLUID procedure in the 
BMR Maintenance Manual. 
UP
FOLD
NOTE: Before operating liftgate, 
read and understand the 
operating instructions in 
the Operation Manual.