HESHBON HL-26K, Installation, Operation And Maintenance Manual, Page: 21 / 34

21
Maintenance
■ Arms
■ Emergency lowering in the event
of power failure
▶Once a year check the condition of each arm by
sliding each section to its fully extended position
and ensure that the arm stop is working correctly.
In the event of a power failure the lift must be
lowered manually. Lift each carriage by approx.
30mm using a trolley jack and a suitable
extension to this and manually release the
lock pawls. Fix the lock pawls mechanically so
that spring pressure does not reengage them.
Remove the trolley jack and extension. Repeat
this operation on the opposite carriage. Remove
the trolley jack and extension. As a safety
precaution before opening the power pack,
switch off the mains and switch off the lockable
main switch on the control panel.
① Remove the cover from the power pack.
② Remove the hexagon cap from the
solenoid valve as shown.
③ Turn the emergency cock lever slowly
and carefully anti-clockwise to ensure
that the lift lowers slowly and safely.
Steps after completing the operation
① Turn the lever clockwise and lock it
securely.
② Refit the hexagon cap.