Autoquip COIL TRANSFER CARS - Manual (Page 35)

35
PROBLEM POSSIBLE CAUSE AND SOLUTION
Lift seems bouncy during
operation. • Lower the lift to collapsed position and continue to hold
“DOWN” button an additional 10-30 seconds to bleed
air from the bleed screws. Do not confuse spongy or
jerky operation with small surges that may occur when
operating on rough or uneven floors
WARNING
!
Do not remove the bleed screw! This could cause
the lift to drop rapidly, resulting in damage to the lift
or cause personal injury. Loosen the screw
carefully to let air out of the system.
• Check for oil starvation.
Motor labors or heats
excessively. • The voltage may be low. Check at the motor terminals
while the pump is running loaded, not at the line source
or while the pump is idling. Inadequate wiring can
starve the motor even when the source voltage is
ample.
• Most of Autoquip’s standard motors are rated for
intermittent duty (two minute run times with two minute
rests). 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.
• The pump may be binding from oil starvation, which
develops high internal heat. Check for low oil level or
closed breather holes in the reservoir fill plug. The
pump can be irreparably damaged by oil starvation and
may have to be replaced.
TROUBLESHOOTING ANALYSIS