Operation; Maintenance - MAC TOOLS JB12 Operating Instructions & Parts Manual

Hydraulic bottle jacks
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OPERATION

Raising the Ram Plunger
1. Assemble Pump Handle, align spring clips with corresponding slots.
2. Place vehicle in park, with emergency brake on and wheels securely chocked to prevent inadvertent vehicle
movement.
3. Locate and close Release Valve by turning Pump Handle clockwise until firm resistance is felt.
4. Verify lift point, center jack Saddle under lift point.
5. Insert Pump Handle into Handle Sleeve and pump to contact lift point. To lift, continue pumping until load reaches
desired height.
6. Transfer the lifted load to a pair of appropriately rated jack stands.
NOTICE: Use Pump Handle provided by jack manufacturer. The handle provided with this jack will safely engage
the release valve and operate the Handle Sleeve. If handle is worn, operates abnormally, or will not positively engage
the release valve, STOP, discontinue use of the jack until a factory replacement handle can be acquired.
Lowering
!
WARNING: Clear all tools and personnel before lowering load. Open release valve slowly. The further handle is
turned counter-clockwise, the faster the load will descend. Maintain control of the load at all times.
1. Raise load high enough to clear the jack stands, then carefully remove jack stands.
2. Slowly turn the Pump Handle counter-clockwise, but no more than 1/2 turn. If the load fails to lower:
a. Use another jack to raise the vehicle high enough to reinstall jack stands.
b. Remove the affected jack and then the stands.
c. Use the functioning jack to lower the vehicle.
3. After removing jack from under the load, push Ram Plunger and Handle Sleeve down to reduce exposure to rust
and contamination.

MAINTENANCE

NOTICE: Use only good quality hydraulic jack oil. Avoid mixing different types of fluid and NEVER use brake fluid,
turbine oil, transmission fluid, motor oil or glycerin. Improper fluid can cause premature failure of the jack and the
potential for sudden and immediate loss of load. Premium hydraulic jack oil is recommended.
Adding oil
1. With Ram Plunger fully lowered and pump piston fully depressed, set jack in its upright, level position. Remove
Oil Filler Plug/Screw.
2. Fill with oil until just below the rim of the oil filler hole. Reinstall the Oil Filler Plug/Screw.
Changing oil
For best performance and longest life, replace the complete fluid supply at least once per year.
1. With Ram Plunger fully lowered and pump piston fully depressed, remove the Oil Filler Plug/Screw.
2. Lay the jack on its side and drain the fluid into a suitable container.
NOTICE: Dispose of hydraulic oil in accordance with local environmental regulations.
3. Fill with oil until just below the rim of oil filler hole.
4. Perform Bleeding/Venting Trapped Air procedure (page 3). Reinstall the Oil Filler Plug/Screw.
4

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Jb20

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