Autoquip SERIES 35 SCISSORS LIFT - Manual (Page 46)

46
PROBLEM POSSIBLE CAUSE AND SOLUTION
Lift Seems Bouncy During
Operation. Lower lift to closed position and continue to hold “DOWN” button an
additional 10-30 seconds to bleed air from cylinder. Do not confuse
spongy or jerky operation with small surges that may occur when
operating on rough or uneven floors.
Check for oil starvation.
Motor Labors Or Heats
Excessively.
Voltage may be low. Check voltage at motor terminals while pump is
running under load, not at line source or while pump is idling.
Inadequate wiring can starve motor even when source voltage is ample.
Most of Autoquip’s standard motors are rated for intermittent duty. If a
single-phase motor is being run more than 15 – 20 motor starts per
hour, or a 3-phase motor more than 200 starts per hour, the problem
may be motor over-heating.
Running against relief pressure unnecessarily due to over loaded lift or
hitting physical stops.
Failure to observe wiring diagram on nameplate for proper voltage
connections.
Pump may be binding from oil starvation, which develops high internal
heat. Check for low oil level or clogged breather holes in reservoir fill
plug. Pump can be damaged by oil starvation.