11921  Slauson Ave.    Santa  Fe  Springs,  CA.    90670    (800)  227-4116    FAX (888)  771-7713
19
1. Unbolt and remove pump cover 
(FIG. 19-1). Place empty 5 gallon 
bucket under drain plug (FIG. 19-2).
CHANGING HYDRAULIC FLUID
GRAVITY DOWN & POWER DOWN LIFTGATES
CAUTION
Keep dirt, water and other contaminants from entering the hydraulic system. 
Before opening the hydraulic fl uid reservoir fi ller cap, drain plug and hydrau-
lic lines, clean up contaminants that can get in the openings. Also, protect the 
openings from accidental contamination. 
FIG. 19-2
DRAIN PLUG
RESERVOIR
+50 to +120 Degrees F - Grade ISO 32  
 Below + 70 Degrees F - Grade ISO 15 or MIL-H-5606
NOTE: Liftgate is shipped with ISO 32 oil. Use correct oil for climate conditions. 
See TABLES 18-1 & 18-2 for recommended brands of ISO 32 & ISO 15 OILS. 
UNBOLTING PUMP COVER
FIG. 19-1
FLAT WASHER, 3/8” X 1/16”
(2 PLACES)
COVER BRACKET
    (2 PLACES)
PUMP COVER
CAP SCREW, 3/8”-16 
(2 PLACES)
NUT, 3/8”-16 
(2 PLACES)