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To Bleed/Purge excessive air from system:
1. Place Jack on flat, level and solid surface.
2. Turn the Breathing Screw (14A) fully counterclockwise. (See Figure 1, below)
3. Turn Handle (20) to a position where Discharge Valve is closed
enough for the Saddle (41) to rise when you pump with no
pressure on the Saddle, but open enough so that the Saddle
does not rise when you pump with one hand while applying
pressure to the Saddle with your other hand. (If the Saddle is
up, turn the Handle slowly counterclockwise until the Saddle
begins to go down slowly. If the Saddle is down, while pumping
quickly, turn the Handle slowly clockwise until the Saddle
begins to rise.)
4. While holding down the Saddle with one hand, rapidly pump the Handle with the other hand,
so that air comes out from between the Breathing Screw and the Oil Plug (13A). Continue
pumping until air stops coming out and you see oil appearing between the Breathing Screw
and the Oil Plug.
5. Tighten the Breathing Screw by turning it clockwise as far as it will go. Then turn it
once 360° counterclockwise.
REV 02g; 03f; 08i
Breathing
Screw (14A)
Maintenance - General
1. Periodically lubricate the joints and Ram (37A) with a light oil as needed.
2. Remove Handle and grease the lower end of Handle where it rotates in the Handle Base (17).
3. Using a grease gun, apply grease to all rod and arm axis points.
4. Oil all lift arm linkages, front wheels, and rear casters.
5. Clean the outside of the Jack with a dry, clean cloth.
6. If the Jack is exposed to moisture, wipe dry with a clean cloth and lubricate as noted in step 1.
7. Store Jack with piston Ram withdrawn (Saddle down), and in a clean and dry location.
If Saddle does not lower and the valve is open, there is too much Hydraulic fluid:
1. Unscrew Oil Plug.
2. Push Saddle and Handle down at the same time.
3. Wipe off any oil that spills.
4. Replace Oil Plug and tighten with Wrench.
If more than eight strokes of Handle is needed to raise Saddle, there may be air in the system.
In that case, follow the Bleed/Purge Instructions, making sure to use full strokes.
If the Saddle does not go up at all during full strokes and valve is closed, there may be exces-
sive air or insufficient hydraulic fluid in the system:
1. Place Jack on a flat, level surface and turn Handle clockwise as far as it goes.
2. Turn Breathing Screw clockwise fully.
3. Turn Handle clockwise fully.
4. Repeatedly pump Handle. Continue as long as air comes out or until Saddle begins to rise. Once
Saddle begins to rise, stop pumping and follow Bleed/Purge Instructions. If Saddle does not begin to
rise and air does not seem to be purging or bleeding, follow Oil Replacement Instructions.
If Handle will not go down:
1. Make sure load is not exceeding 3,000 lb. capacity.
2. Make sure Saddle is not already at maximum height. If it is, lower and reposition under different
part of vehicle.
3. If Jack functions properly and you are unable to push down and apply the required 150 lbs. of force
needed to operate Jack, seek the help of another person for assistance.
