Presto Lifts DBP Series, Инструкция по установке, эксплуатации и обслуживанию

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PRESTO OWNER’S MANUAL Page 9 DBP SERIES SCISSOR LIFTS
TROUBLESHOOTING MAINTENANCE -- ELECTRIC
S E C T I O N 8
TROUBLESHOOTING
IF LIFT DOES NOT RISE TO FULL HEIGHT — check for leaks or shortage of oil. Maintain the
proper oil level. To check oil level, follow these instructions:
⇑ On left hand side, on top of oil well, you will find a hexagon cap screw which is also a dipstick.
⇑ Remove the cap screw and fill oil well with hydraulic oil. Oil should reach notch on dipstick.
IF THE LIFT TENDS TO CREEP DOWNWARD UNDER A LOAD — a speck of dirt may be obstructing the
seating of the valve and allowing leakage. To correct, follow these instructions:
⇑ Raise lift to full lifting height and then lower it to lowest point of lift. It may be necessary to do this five or
six times. In lowering the lift, lower it in stages, that is, lower the lift six inches to a foot at a time. This will
dislodge the dirt and lift will operate properly.
Problem Probable Cause Service Required
Lift will not move
w/ no motor noise
Loss of power
Motor failure
Check power switch or battery and charger
Check voltage at motor
Lift will not move with
motor noise
Overloaded lift
Motor
Check load
Low voltage at motor -- battery low
Oil starvation
Check oil reservoir
Motor overheats Excessive cycling rate Check cycle rate, 15 cycles per hour maxi-
mum
Low voltage. Check voltage at motor
Up cycle slow Oil starvation
Oil viscosity
Air in cylinder system
Check and fill reservoir
Check oil viscosity and replace if necessary
Purge system by cycling several times to
full extension and retraction
Down cycle slow Blockage in hydraulic line
Oil
Check for pinched lines
Oil viscosity to heavy; replace
Oil contaminated; replace
Lift raises then lowers
slowly
Check valve
Not seating
Leaking fitting
Remove and clean
Check fittings and lines for telltale oil spots