Trolley jacks have a saddle that is placed under the vehicle to enable lifting.
Trolley jack lifting arm
The lifting arm is connected to the saddle and raises when pumped. This gives the jack its maximum extension.
Trolley jack cover plate
The cover plate is used to protect the hydraulic system from any damage.
Trolley jack release valve
The release valve can be opened by turning it anti-clockwise. To close it, simply turn the valve clockwise. Opening the release valve allows pressure to be released, drawing the oil back into the reservoir. Closing the release valve will enable the jack to be ready for lifting.
Trolley jack filler plug or screw
The filler screw or plug can be removed to add oil/lubrication to the reservoir.
Trolley jack piston assembly (Pump piston & cylinder)
Once the handle is lifted, the piston raises, bringing oil into the cylinder. Moving the handle downwards will push oil into the main cylinder, which raises the lifting arm.
Trolley jack reservoir
The oil reservoir is located on the inside of the jack where the oil is stored.
Trolley jack carry handle
This is for the user to easily carry and transport the jack.
Trolley jack socket
The jack handle will slot into the socket and enable the user to pump the jack to lift a load.
Trolley jack castor wheels
Castors are wheels designed to fit on to the bottom of larger objects. A trolley jack contains castors that swivel 360 degrees to easily move the jack in any direction without changing its orientation.
Trolley jacks usually also have large front wheels for stability while lifting.
Trolley jack frame
The frame surrounds the hydraulic system connecting each individual part.
Trolley jack handle
The handle enables pumping to lift a load – it is also used to open and close the release valve.
Located at the bottom of the handle is a bayonet connector with an individual pin which will be inserted into an L-shaped slot on the socket.
Trolley jack levelling arm
The levelling arm is attached to the bottom of the saddle and side of the frame to make the lift more stable.