Autoquip AIR FORCE PNEUMATIC - Manual (Page 21)

21
WARNING!
To avoid personal injury, NEVER go under the lift platform until the
load is removed and the scissors mechanism is securely blocked in
the open position. See the "Lift Blocking Instructions" section.
Lift drifts down slowly during
non-operation. • Make sure all of the connections are tight and that
no leaks are occurring in the system.
PROBLEM POSSIBLE CAUSE AND SOLUTION
Lift does not raise • The load may exceed the rating for the specific line
pressure. Refer to the performance curves shown in
the “Lifting Capacity vs. Air Pressure” curves in the
“General Maintenance” section.
• There may not be enough, or any, line pressure.
Check the supply pressure with a gauge and ensure
it provides the minimum pressures required as
shown in the performance curves shown in the
“Lifting Capacity vs. Air Pressure” curves in the
“General Maintenance” section.
• Make sure the air supply line is connected to the
correct port on the hand or foot control valve. It is
marked “Inlet”.
• It may be that an obstruction was introduced into the
system during installation. Check for obstructions at
the inlet of the control valve, in the connecting hose
to the lift, and at the restrictor in the bottom of the air
bag.
Lift seems bouncy during
operation. • This is normal for large volume (air bag) air-powered
systems due to the compressible nature of air,
(especially at raised elevations) between fully
lowered and fully raised positions.
TROUBLESHOOTING ANALYSIS