13.0 TROUBLESHOOTING
Use this section to help diagnose issues if the lift table is not operating as specified.
DANGER
• Failure to properly secure the lift table prior to working underneath it may result in bodily injury, or death.
• Engage the Maintenance Struts before working. If both cannot be successfully engaged, contact your Blue Giant Dealer.
WARNING
• Do not attempt to install, make repairs, or adjustments. Only a trained and authorized service technician should perform the
installation process, make repairs, or make adjustments. Contact your Blue Giant Dealer for assistance.
• Do not service this equipment until you have read and understood all of the safety information and instructions contained herein.
Failure to adhere to recommended safety practices in this manual and on the lift table equipment warning labels could result in death
or serious injury.
• Do not conduct maintenance or repairs until adequate barriers have been placed to keep warehouse and vehicle traffic away from
the work area.
• Before doing any electrical work, verify that the power is disconnected and properly tagged or locked out, in accordance with
OSHA regulations and approved electrical codes.
• When conducting maintenance, use only Blue Giant approved lubricants. Improper lubrication or adjustments may cause
operational problems.
Following description of operating principles is intended as a guide when trouble shooting and making adjustments or repairs. If no fault
can be found and equipment fails to operate properly, contact your Blue Giant Equipment Dealer.
• Pressing the UP push button energizes pump which supplies fluid under pressure to cylinder for lifting the deck. A check valve
(inside pump or in line) prevents any back flow of oil through pump when it is shut off.
• Pressing the DOWN push button opens solenoid lowering valve which allows fluid from the cylinder to return to reservoir. Lowering
speed is controlled by load lowering valve. Lowering is factory set for safe lowering and normally requires no further adjustment.
• If a limit switch is used to control upward travel, it is electrically connected in series with the UP push button switch.
• Upward travel of the deck is limited by stops on the leg roller tracks of the lower frame (in some cases internal stops within cylinders
are used to limit travel). These stops should never be used to position deck at intended raised height.
PROBLEM PROBLEM CAUSED
Deck will not raise. Foreign material lodged between side of deck and lower frame. Remove and discard foreign
material as required.
Equipment or goods parked on lift table deck. Remove and test operate the lift table. Verify lift table
capacity before resuming.
Low hydraulic oil fluid in power unit. Damaged hose or other oil leak, repair and refill with approved
hydraulic oil as required.
Incorrect motor rotation: three phase power supply only. Contact qualified personnel to correct.
Fuse and / or overload blown. Check fuse and / or overload reset.
Filter may have blockages. Clean or replace suction filter.
Valve may have blockages. Replace / repair if necessary.
Pump not running at correct system pressure. Replace / repair if necessary.
UP push button/open circuit. Check for open circuit in UP limit set improperly contact block or broken
wire in harness.
Wrong voltage. Check line voltage to nameplate voltage.
Motor connected to high voltage connection on lower voltage feed. Check motor connection to
nameplate.
Control fuse blown. Replace.
Interlock devices. Check all switches.
Shipping bolts not removed. Remove.
Hydraulic hose pinched. Check hose for pinching, folding, or object on top of hose.
The lift table deck does not maintain steady height. Oil leak may be present. Repair leak.
Motor check valve is defective. Replace, if necessary.
Down solenoid valve is defective. Replace, if necessary.
The lift table deck locked in “UP” position. When
DOWN button is pushed, a click can be heard.
Velocity fuse locked. Contact your Blue Giant Dealer.
If equipped, lowering speed valve closed. Open to set proper lowering speed.
Deck will not lower. No clicking sound heard when a
button is pressed.
DOWN push button broken / open circuit. Check for open circuit in contact block, broken wire in
harness. Scissor leg bushings seized.
Lowering valve defective. Replace.
Deck raises slowly. Pressure relief bypassing. Foreign material lodged between ball and seat. Contact your Blue Giant
Dealer.
Faulty Power Pack. Replace Powerpack.
Weight overload. Remove weight until load matches nameplate weight capacity rating.
IN-PLANT LFT LIFT TABLE — OWNER'S MANUAL
33ISSUE DATE: NOVEMBER 15, 2023 REV. 1.0 (PART # 038-475E)
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