Troubleshooting | Autoquip

Lift Doesn’t Raise/Raises Slowly

Motor rotation for a 3-phase motor may be reversed. Reverse two motor electrical leads.
Check for line or hose leak.
Check for low oil in reservoir. Add specified oil as necessary. (See manual)
Load may exceed rating. See the Specifications section. Remove excess load
Suction screen may be clogged, starving pump. Remove and clean screen. Drain and replace oil.
Suction line may be leaking air due to a loose fitting. Tighten as needed.
Breather holes in reservoir fill plug may be clogged. Remove and clean.
Voltage may be too low to run pump with existing load. Check by measuring voltage at motor terminals, or as near as possible, while pump is running under load. Inadequate or incorrect wiring can starve motor when source voltage is ample. Correct as necessary.
Down valve may be energized by faulty wiring or stuck open. Remove solenoid and check.
Motor may be single phasing. Check wiring, fuses, etc.
Pump may be seized if motor is humming or blowing fuses on overload protection devices. Remove pump. Pump can be rotated by hand unless seized. Check for cracks in housing.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Doesn’t Lower/Lowers Slowly

Solenoid coil may be incorrectly wired, burned out, not rated for the voltage, or line voltage may be excessively low. Check voltage near coil.
Velocity fuse may be locked. Do not attempt to remove the velocity fuse. The following steps should be followed:

Remove load from lift. Inspect all fittings, hoses, and other hydraulic components for leaks or damage.
If no leak or damage is noticed, attempt to pressurize lifting cylinder by pressing “UP” button on controller for a few seconds. Immediately release “UP” button and press “DOWN” button. If lift starts to lower, continue pressing “DOWN” button until lift is fully lowered.
If lift does not lower after trying Step 2, wait approximately 10 – 15 minutes for pressure in hydraulic system to equalize. Then, press “DOWN”
button until lift is fully lowered.
Once lift is fully lowered, hold “DOWN” button for approximately 60seconds to bleed air from system. This step may need to be repeated several times to fully remove air in system by raising the lift to 50% of its travel and lowering.

**If above steps do not correct problem, contact Autoquip to obtain instruction for further action.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Raises, Then Lowers Slowly

Down solenoid may not be seating. Remove solenoid coil and check. If lift does not hold with solenoid coil removed, remove and clean down valve cartridge or replaced as necessary.
Oil line, hose, or fitting may be leaking. Check and repair if necessary.
Check valve in pump assembly may not be seating. This is indicated by pump shaft and motor turning backward on their own with no power applied. Generally, this condition can be heard. Replace pump assembly.

*Check product manual for full list of Troubleshooting questions related to your lift

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. 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.
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.

*Check product manual for full list of Troubleshooting questions related to your lift

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 and may have to be replaced.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Won’t Go Forward Or Reverse (Coil Transfer Car)

The traverse path may be blocked with debris or other obstacle. Look under the base and remove any obstacle that may impede travel.
The axle may be “high centered” on some obstacle, preventing the wheels from gaining enough traction. Inspect under the axles and remove any obstruction.
The non-rotation devise may have broken or vibrated loose. Reattach or replace bracket.
The load may exceed the nameplate capacity and exceed the horsepower ratings for the drive train. Ensure the load is within the rated limits.
There may not be enough amps available. Check the supply amperage to ensure it provides the minimum amperage needed per the vendor’s specifications.
There may be a loose electrical connection. Make sure all electrical connections are intact and check for shorts.

*Check product manual for full list of Troubleshooting questions related to your lift

Manuals for Scissor Lifts

Turntable is Difficult to Rotate

There may be roller damage. Check the turntable base rollers for proper alignment and possible bearing damage. Replace as necessary.
The load is not evenly distributed on t he platform. Make sure that the center of gravity of the load is within 10” of the center of the turntable.
One or more roller tubes are not sitting vertically on the base plate. Make sure that each roller tube is perpendicular to the base plate (it could have been bent slightly during shipping/handling). Call the factory for base replacement.
The thrust washers are not installed properly. See Figure 5 in the Installation Section to ensure that the center pin thrust washers have been installed properly. Missing washers will cause the platform to “dish” in the center when bolted in place.
The center pin-retaining bolt has been over tightened. The retaining bolt should be backed off and retightened using no more than 80 ft. lbs of torque.
If the turntable was provided with detents, the detent bar may be set too tight. There is an adjustment screw to lessen the stopping pressure against the detent pins.

*Check product manual for full list of Troubleshooting questions related to your lift

Powered Turntable is Difficult to Rotate

There may be roller damage. Check the turntable base rollers for proper alignment and possible bearing damage. Replace as necessary.
The turntable is loaded beyond its rated capacity and causing the motor to stall or the gearbox to slip. Check the load amount.
One or more pushbuttons or motor connections may not be made, or could be shorted out. Check for and resolve any connection problems.
There may not be sufficient amp draw for the motor. Check the amperage requirements on the motor nameplate and verify with an amp meter that sufficient power draw is available.
The turntable platform may have hit an obstruction. Check for and remove any obstruction that may impede the rotating path of the turntable.

*Check product manual for full list of Troubleshooting questions related to your lift

Turntable is Making a Popping Noise

One or more roller tubes are misaligned with respect to the center pin. Each tube should be perpendicular to the center pin, or the platform will roll across the roller instead of rolling over it. Perpendicularity can be checked using a large square. Call the factory for base replacement.
The gearbox may be cracked or damaged from overloading or improper loading. Call the factory for gearbox replacement parts.

*Check product manual for full list of Troubleshooting questions related to your lift

Turntable Rotates in the Wrong Direction

The motor or pushbutton connections may have been reversed. Check for and resolve any connection problems.

*Check product manual for full list of Troubleshooting questions related to your lift

Manuals for Turn Tables

High Capacity Powered Turntable Series 35 Powered Turntable Manual Series 35 Turntable Manual Series 35 Turntable Manual - Spanish Version

Freight Lifts Will Not Raise (Motor NOT Running or “Humming”).

WARNING! A safety device may have been activated – if you are not familiar with how safety devices interact with the operation of the lift, you must find someone who does. Or, call Autoquip Customer Service at 888-811-9876.
The emergency stop button may be depressed or jammed. Check all pushbutton stations. Repair / replace.
The main disconnect switch / distribution panel circuit breaker is tripped or a fuse is blown. Check and reset or replace as necessary.
A door with status switch is open, or switch or interlock is malfunctioning or is out of tolerance. Close door, or check and repair or adjust as required per gate manual (shipped separately – when gates supplied by Autoquip).
The push button / circuit is malfunctioning. Check components and circuit. Repair or replace.
The motor starter overloads (MSO) have tripped. Check and reset. If it trips again, check for cause in the motor circuit.
The control transformer fuse is blown. Check and replace.
MECHANICAL 4 POST VRC, MECHANICAL CANTILEVER VRC WARNING! The lifting chains may be disconnected and slack chain ] sensing switches missing or malfunctioning. Check while standing near (but NOT on) the lift carriage and correct as necessary – once carriage has been blocked in place.
A slack chain sensing switch is activated due to a slack or broken chain condition, or the sensing switch is malfunctioning or is out of tolerance. Check and/or reestablish chain tension, or check & repair or adjust sensing switch(es) as required per “Installation” section.
The Electric Current Sensor (ECS) has tripped due to an excessive or jammed load on the carriage. Reduce load to within rated capacity, or follow procedure to free the jammed load (See “Installation” section for procedure).
The counterweight sensing switch, over-travel switch, or other safety status switches/sensors may have been tripped. Investigate cause and eliminate the condition which has caused them to trip.
The level limit switch tripped or is malfunctioning, preventing the “UP” command. Check with the lift at a lower level on stops.

*Check product manual for full list of Troubleshooting questions related to your lift

Freight Lift Will Not Raise (Motor IS Running or “Humming”).

WARNING! A safety device may have been activated – if you are not familiar with how safety devices interact with the operation of the lift, you must find someone who does. Or, call Autoquip Customer Service at 888-811-9876.
WARNING! The lifting cables (or chains) may be disconnected or broken. Check while standing near (but NOT on) the lift carriage and correct as necessary – once carriage has been blocked in place.
The load may exceed the rated capacity of the lift. Remove any excess load.
Rotation on the 3-phase motor may be reversed. Reverse any two motor electrical leads.
The 3-phase motor may be single-phasing (humming). Check wiring, fuses, etc.
The voltage at the motor terminals may be too low to run the pump with the existing load. Check by measuring the voltage at the motor terminals (or as near as possible) while the pump is running under load. Reading the source voltage or pump idling voltage is meaningless. Inadequate or incorrect wiring can starve the motor when the source voltage is ample. Correct as necessary.
The Motor brake may be seized if the motor is humming, blowing fuses, or overloads. Remove the motor and check to see if the brake is working correctly.

*Check product manual for full list of Troubleshooting questions related to your lift

The Freight Lift Will Not Lower (Electrically).

WARNING! A safety device may have been activated – if you are not familiar with how safety devices interact with the operation of the lift, you must find someone who does. Or, call Autoquip Customer Service at 888-811-9876.
The emergency stop button may be depressed or jammed. Check all pushbutton stations. Repair as necessary.
The main disconnect switch / distribution panel circuit breaker is tripped or a fuse is blown. Check and reset or replace as necessary.
A door with status switch is open, or switch or interlock is malfunctioning or is out of tolerance. Close door, or check and repair or adjust as required.
The push button / circuit is malfunctioning. Check components and circuit. Repair or replace.
The motor starter overloads (MSO) have tripped. Check and reset. If it trips again, check for cause in the motor circuit.
The control transformer fuse is blown. Check and replace.
Check for tripped velocity fuses. *NOTE: CONTACT THE AUTOQUIP SERVICE DEPARTMENT BEFORE ATTEMPTING TO REPAIR THIS PROBLEM!!
WARNING! The lifting chains may be disconnected and slack chain sensing switches missing or malfunctioning. Check while standing near (but NOT on) the lift carriage and correct as necessary – once carriage has been blocked in place.
A slack chain sensing switch is activated due to a slack or broken chain condition, or the sensing switch is malfunctioning or is out of tolerance. Check and/or reestablish chain tension, or check & repair or adjust sensing switch(es) as required per “Installation” section.
The Electric Current Sensor (ECS) has tripped due to an excessive or jammed load on the carriage. Reduce load to within rated capacity, or follow procedure to free the jammed load (See “Installation” section for procedure).
The counterweight sensing switch, over-travel switch, or other safety status switches/sensors may have been tripped. Investigate cause and eliminate the condition which has caused them to trip.
The level limit switch tripped or is malfunctioning, preventing the “UP” command. Check with the lift at a lower level on stops.

*Check product manual for full list of Troubleshooting questions related to your lift

Motor Labors or Heats Excessively.

The voltage may be low. Check at the motor terminals while the pump is running under load. Do not check at the line source or while the pump is idling. Inadequate wiring can starve the motor even when the source voltage is ample.
The wiring may be incorrect. Be sure one leg of the motor line is not connected to the ground prong. This can happen particularly on 3-phase units using twist-lock plugs.
The pump may be binding from oil starvation. This can cause high internal heat. The pump can be irreparably damaged by oil starvation and may have to be replaced!
(Mechanical 4 Post VRC) The gear reducer may be binding from oil starvation. The is can cause high internal heat. The gear reducer can be irreparably damaged by oil starvation and may have to be replaced.

*Check product manual for full list of Troubleshooting questions related to your lift

The Freight Lift Does Not Raise Completely to the Upper Level (Press “Emergency Stop” Button to Stop Motor.)

The oil level in the reservoir may be too low. Check and replace. Determine the cause of the oil condition and repair.
There is some sort of interference with the platform carriage. Check and correct.
The load exceeds the capacity of the unit. Lower the unit, unload, and try again.
Check the upper limit switch setting to see if the setting is correct.

*Check product manual for full list of Troubleshooting questions related to your lift

Unit Operates in a “Spongy” or Jerky Fashion.

The load may exceed the stated capacity of the unit. Overloading causes the pressure switch valve to activate and deactivate if the “UP” button is depressed. (Motor may start and stop if this condition exists.) Remove the excess load.
Check for oil starvation.
The rollers may be binding. Check and repair.
The chain may be off of a sprocket. Check and repair.
The platform carriage may be binding in the guide ways. Check and repair.

*Check product manual for full list of Troubleshooting questions related to your lift

Freight Lift Raises, Then Lowers Back Slowly.

The “DOWN” solenoid valve may be energized in the “OPEN” position. Remove the solenoid coil and recheck. If the lift does not hold with the solenoid coil removed, replace the down valve cartridge.
The hydraulic cylinder rod seal may be leaking. Check to see if there is hydraulic oil running down the outside of the cylinder barrels at the rod end. Repair as necessary. (NOTE: a small amount of oil at the bottom of the rod is normal and desirable for proper lubrication of the cylinder. A leak would cause oil to flow from the rod area when the lift is in the raised position.)
Check valve in the pump or Detatrol may be contaminated or defective. Repair or replace.

*Check product manual for full list of Troubleshooting questions related to your lift

Manuals for Freight Lifts

Lift Doesn't Raise/Raises Slowly

Load may exceed rating. See the Specifications section. Remove excess load.
Check for line or hose leak.
Suction screen may be clogged, starving pump. Remove and clean screen. Drain and replace oil.
Suction line may be leaking air due to a loose fitting. Tighten as needed.
Breather holes in reservoir fill plug may be clogged. Remove and clean.
Down valve may be energized by faulty wiring or stuck open. Remove solenoid and check.
The motor voltage/wiring may be incorrect.
Oil in the reservoir may be low. Add oil as necessary.
The power Unit Pump may be defective.
The Structural members of the lift may be in a bind.
The manual lowering device may be engaged.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Doesn’t Lower/Lowers Slowly

Solenoid coil may be incorrectly wired, burned out, not rated for the voltage, or line voltage may be excessively low. Check voltage near coil.
The Down Solenoid may be malfunctioning.
The maintenance leg could be installed.
The Structural members may be in a bind.
The tubing or hose is obstructed or broken. Check for obstruction in the line.
The return filter may be clogged.
Velocity fuse may be locked. Do not attempt to remove the velocity fuse. The following steps should be followed:

Remove load from lift. Inspect all fittings, hoses, and other hydraulic components for leaks or damage.
If no leak or damage is noticed, attempt to pressurize lifting cylinder by pressing “UP” button on controller for a few seconds. Immediately release “UP” button and press “DOWN” button. If lift starts to lower, continue pressing “DOWN” button until lift is fully lowered.
If lift does not lower after trying Step 2, wait approximately 10 – 15 minutes for pressure in hydraulic system to equalize. Then, press “DOWN”
button until lift is fully lowered.
Once lift is fully lowered, hold “DOWN” button for approximately 60seconds to bleed air from system. This step may need to be repeated several times to fully remove air in system by raising the lift to 50% of its travel and lowering.

**If above steps do not correct problem, contact Autoquip to obtain instruction for further action.

*Check product manual for full list of Troubleshooting questions related to your lift

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. 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 toilet air out of the system.
Oil in the reservoir may be low. Add oil as necessary (See the “Routine Maintenance” section).
There may be air in the hydraulic system. Bleed the air from the cylinder.
The power unit suction strainer may be clogged.
There may be an obstruction in the path of the mounting platform.

*Check product manual for full list of Troubleshooting questions related to your lift

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 and may have to be replaced.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Will Not Remain in Raised Position

The cylinder packing may be leaking.
The pump regulator is not seating.
The pump check valve is not seating.
The hydraulic tubing, hose, or fitting is leaking oil.
The return filter may be clogged.

*Check product manual for full list of Troubleshooting questions related to your lift

Manuals for Dock Lifts

Pit & Surface Mounted Truck Leveler Manual CMD Dock Lift Manual PDQ Dock Lift Manual PLD Dock Lift Manual TSL Dock Lift Manual PLT Dock Lift Manual PLT Dock Lift Spanish Manual

Lift Doesn't Raise/Raises Slowly

The load may exceed the rating. (See the “Specifications” section.)
The motor voltage/wiring may be incorrect.
Oil in the reservoir may be low. Add oil as necessary. (See the “Routine Maintenance” section.)
The suction screen may be clogged. Remove and clean the screen. Drain and replace the oil.
The suction line may be leaking air due to a loose fitting. Tighten as needed.
The breather holes in the reservoir fill cap may be clogged. Remove and clean.
The “Down” valve may be energized by faulty wiring or stuck open. Remove the solenoid and check.
The power unit pump may be defective.
The structural members of the lift may be in a bind.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Doesn’t Lower/Lowers Slowly

The down solenoid may be malfunctioning.
The structural members may be in a bind.
The piping is obstructed or broken.
The return filter may be clogged.
Check the oil level in the reservoir.
The motor voltage/wiring may be incorrect.
The suction screen may be clogged. Remove and clean the screen. Drain and replace the oil.
The suction line may be leaking air due to a loose fitting. Tighten as needed.
The breather holes in the reservoir fill cap may be clogged. Remove and clean.
The power unit pump may be defective.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Seems Bouncy During Operation

There may be air in the hydraulic system. Bleed the air from the cylinder.
Oil in the reservoir may be low. Add oil as necessary. (See the “Routine Maintenance” section.)
The power unit suction strainer may be clogged.
The power unit suction line may be leaking.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Will Not Remain in Raised Position

The ram packing may be leaking.
The Gould valve or swing check valve is not seating.
The piping is leaking oil.

*Check product manual for full list of Troubleshooting questions related to your lift

Manuals for Vertical Ram Lifts

Vertical Ram Lifts Single Manual Vertical Ram Lifts Dual Manual

Bridge Doesn't Raise/Raises Slowly

The load may exceed the bridge rating. (See the “Specifications” section of manual.)
The motor voltage/wiring may be incorrect.
The hydraulic line or hose may be leaking.
Oil in the reservoir may be low. Add oil as necessary. (See the “Routine Maintenance” section.)
The suction screen may be clogged. Remove and clean the screen. Drain and replace the oil.
The suction line may be leaking air due to a loose fitting. Tighten as needed.
The breather holes in the reservoir fill plug may be clogged. Remove and clean.
The “Down” valve may be energized by faulty wiring or stuck open. Remove the solenoid and check.
The power unit pump may be defective.
The structural members of the bridge may be in a bind.
The manual lowering device may be engaged.

*Check product manual for full list of Troubleshooting questions related to your lift

Bridge Doesn’t Lower/Lowers Slowly

The down solenoid may be malfunctioning.
The oil viscosity is not suited for the environmental conditions. Refer to “Routine Maintenance” section for oil recommendations.
The structural members may be in a bind.
The tubing or hose is obstructed or broken. Check for obstruction in the line.
The return filter may be clogged.
Velocity fuse may be locked. Do not attempt to remove the velocity fuse. The following steps should be followed:

Inspect all fittings, hoses, and other hydraulic components for leads or damage.
If no leak or damage is noticed, attempt to pressurize the lifting cylinder by depressing the “UP” button on the controller for a few seconds. Immediately up releasing
the “UP” button, depress the “DOWN” button. If the bridge starts to lower, continue pressing the “DOWN” button until the bridge is in the fully lowered position.
If the bridge does not lower after trying Step 2, wait approximately 10 – 15 minutes for the pressure in the hydraulic system to equalize. Momentarily press the “UP” button, then, depress the “DOWN” button until the bridge is in the fully lowered position.
Once the bridge is in the fully lowered position, bleed the air from the hydraulic system by depressing the “DOWN” button. Hold the “DOWN” button for approximately
60 seconds. This step may need to be repeated several times to fully remove the air in the system by raising the bridge to 50% of its travel and then lowering it.

**If above steps do not correct problem, contact Autoquip to obtain instruction for further action.

*Check product manual for full list of Troubleshooting questions related to your lift

Bridge Will Not Remain in Raised Position

The cylinder packing may be leaking.
The pump or Deltatrol regulator is not seating.
The pump or Deltatrol check valve is not seating.
The hydraulic tubing, hose, or fitting is leaking oil.
The return filter may be clogged.

Manuals for Bascule Bridges

Bascule Bridge - Double Leaf Manual

Tilter Doesn’t Raise/Raises Slowly, Upender Doesn’t Tilt

The load may exceed the rating. (See the “Specifications” section of manual.) Remove the excess load.
Check for a line or hose leak.
Check for oil shortage in the reservoir. Add oil as necessary. (See Oil Requirements in the “Routine Maintenance” section.)
The suction screen may be clogged, starving the pump. Remove and clean the screen. Drain and replace the oil.
The suction line may be leaking air due to a loose fitting. Tighten as needed.
The breather holes in the reservoir fill plug may be clogged. Remove and clean.
The pump may be seized if motor is humming or blowing fuses on overload protection devices. Remove the pump. The pump should be able to be rotated by hand. Check for cracks in the housing.

Tilter Doesn’t Lower/Lowers Slowly, Upender Tilts Slowly

The load may exceed the rating. (See the “Specifications” section of manual.) Remove the excess load.
The solenoid coil may be incorrectly wired, burned out, not rated for the voltage, or the line voltage may be excessively low. Check voltage near the coil.
Check for pinched or broken tubing or hose. Where pipe is used, check for obstruction in the line.
Velocity fuse may be locked. Do not attempt to remove the velocity fuse. The following steps should be followed:

Remove the load from the tilter. Inspect all fittings, hoses, and other hydraulic components for leads or damage.
If no leak or damage is noticed, attempt to pressurize the lifting cylinder by depressing the “UP” button on the controller for a few seconds. Immediately up releasing
the “UP” button, depress the “DOWN” button. If the tilter starts to lower, continue pressing the “DOWN” button until it is in the fully lowered position.
If the tilter does not lower after trying Step 2, wait approximately 10 – 15 minutes for the pressure in the hydraulic system to equalize. Then, depress the “DOWN”
button until it is in the fully lowered position.
Once the tilter is in the fully lowered position, bleed the air from the hydraulic system by depressing the “DOWN” button. Hold the “DOWN” button for approximately 60
seconds. This step may need to be repeated several times to fully remove the air in the system by raising the tilter to 50% of its travel and lowering.

**Should the above steps not correct the problem, contact Autoquip to obtain instruction for further action

Tilter Seems Bouncy During Operation

Power unit suction line may be leaking.
Oil Reservoir may be low. Check levels and fill as necessary. See “Specifications” section.
May be air in the hydraulic. Bleed the hydraulic lines.
Battery connections may be loose. Check connections.

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 tilter 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.

Tilter Raises, Then Lowers Back Slowly

The oil line, hose, or fitting may be leaking. Check and repair if necessary.
The “check valve” in the pump assembly may not be seating. This is indicated by the pump shaft and motor turning backward on their own with no power applied. Generally, this condition can be heard. Replace the pump assembly.

Manuals for Tilters

High Hinge Dumper Manual 90 Degree Rotator - Non Intrusive Manual 90 Degree Tilter Manual 90 Degree Upender Manual Air Force Lift And Tilt Manual Air Force Pneumatic Tilters Manual AutoTilt Manual Tork Non-Intrusive Tilter Manual Series 35 Tilters Manual Tiltlift Manual

Lift Doesn’t Raise/Raises Slowly

Motor rotation for a 3-phase motor may be reversed. Reverse two motor electrical leads.
Check for line or hose leak.
Check for low oil in reservoir. Add specified oil as necessary. (See manual)
Load may exceed rating. See the Specifications section. Remove excess load
Suction screen may be clogged, starving pump. Remove and clean screen. Drain and replace oil.
Suction line may be leaking air due to a loose fitting. Tighten as needed.
Breather holes in reservoir fill plug may be clogged. Remove and clean.
Voltage may be too low to run pump with existing load. Check by measuring voltage at motor terminals, or as near as possible, while pump is running under load. Inadequate or incorrect wiring can starve motor when source voltage is ample. Correct as necessary.
Down valve may be energized by faulty wiring or stuck open. Remove solenoid and check.
Motor may be single phasing. Check wiring, fuses, etc.
Pump may be seized if motor is humming or blowing fuses on overload protection devices. Remove pump. Pump can be rotated by hand unless seized. Check for cracks in housing.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Doesn’t Lower/Lowers Slowly

Solenoid coil may be incorrectly wired, burned out, not rated for the voltage, or line voltage may be excessively low. Check voltage near coil.
Velocity fuse may be locked. Do not attempt to remove the velocity fuse. The following steps should be followed:

Remove load from lift. Inspect all fittings, hoses, and other hydraulic components for leaks or damage.
If no leak or damage is noticed, attempt to pressurize lifting cylinder by pressing “UP” button on controller for a few seconds. Immediately release “UP” button and press “DOWN” button. If lift starts to lower, continue pressing “DOWN” button until lift is fully lowered.
If lift does not lower after trying Step 2, wait approximately 10 – 15 minutes for pressure in hydraulic system to equalize. Then, press “DOWN”
button until lift is fully lowered.
Once lift is fully lowered, hold “DOWN” button for approximately 60seconds to bleed air from system. This step may need to be repeated
several times to fully remove air in system by raising the lift to 50% of its travel and lowering.

**If above steps do not correct problem, contact Autoquip to obtain instruction for further action.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Raises, Then Lowers Slowly

Down solenoid may not be seating. Remove solenoid coil and check. If lift does not hold with solenoid coil removed, remove and clean down valve cartridge or replaced as necessary.
Oil line, hose, or fitting may be leaking. Check and repair if necessary.
Check valve in pump assembly may not be seating. This is indicated by pump shaft and motor turning backward on their own with no power applied. Generally, this condition can be heard. Replace pump assembly.

*Check product manual for full list of Troubleshooting questions related to your lift

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. 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 toilet air out of the system.
Check for oil starvation.
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.

*Check product manual for full list of Troubleshooting questions related to your lift

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 and may have to be replaced.

*Check product manual for full list of Troubleshooting questions related to your lift

Lift Won’t Go Forward Or Reverse (Coil Transfer Car)

The traverse path may be blocked with debris or other obstacle. Look under the base and remove any obstacle that may impede travel.
The axle may be “high centered” on some obstacle, preventing the wheels from gaining enough traction. Inspect under the axles and remove any obstruction.
The non-rotation devise may have broken or vibrated loose. Reattach or replace bracket.
The load may exceed the nameplate capacity and exceed the horsepower ratings for the drive train. Ensure the load is within the rated limits.
There may not be enough amps available. Check the supply amperage to ensure it provides the minimum amperage needed per the vendor’s specifications.
There may be a loose electrical connection. Make sure all electrical connections are intact and check for shorts.

*Check product manual for full list of Troubleshooting questions related to your lift

Support