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6
OPERATION
LOWERING THE JACK
To avoid crushing injuries and property
damage: Keep hands and feet clear of work
area when lowering load.
1. Raise load high enough to clear the jack
stands, then carefully remove jack stands
(always use in pairs).
2. Slowly turn the handle counterclockwise,
but no more than 1/2 full turn. If the load
fails to lower:
MAINTENANCE
SPECIFICATIONS
(see Fig. 4)
FIG. 4
I
tem Description 12 Tons 20 Tons
A X B Base Dimension (B not shown) 5-1/8 in. X 5-1/4 in. 5-15/16 in. X 6-1/4 in.
C Maximum Height 18-5/8 in. (473mm) 18-11/16 in. (475mm)
D Minimum Height 9-7/16 in. (240mm) 9-1/2 in. (242mm)
E Hydraulic Stroke (travel) 6 in. 6 in.
F Extension Screw Travel 3-1/8 in. 3-1/8 in.
50284 50285
!
a. Use another jack to raise the vehicle
high enough to reinstall jack stands.
b. Remove the affected jack and then the
stands.
c. Using the other jack, lower the load by
turning the operating handle counter-
clockwise, but no more than 1/2 full
turn.
3. After removing jack from under the load,
push saddle down to reduce ram exposure
to rust and contamination.
MODEL
A
E
D
C
F