Troubleshooting Guide - Southworth (Shanghai) Lifting Equipment Co., Ltd.

您现在的位置：首页 / Parts & Service / Troubleshooting Guide

Please use this helpful information to troubleshoot issues with your Southworth equipment. Just find your equipment category and click on it to reveal a list of common issues and suggestions for resolving them. If you don't find what you need, don't worry, just give us a call+86 021 57491919.

Lift Tables - Click to Expand

All lift tables including LL, LS, DL, LST, LSH, ZLS, and LiftMat Series.

PROBLEM	POSSIBLE CAUSE	CHECK THIS
Lift will not raise	Weight of load too heavy	Check actual weight of the load.
	Motor not running	Check the main disconnect switch, fuses, and wiring to the motor. A 20 amp designated breaker must be supplied for 110V.
	Hydraulic oil level low	When lift is raised as far as possible, oil level should be 3/4' from bottom of tank. When lift is down, 3/4' from top.
	Lift has reached its upper limit	Upper limit switch may need to be adjusted.
	Motor may be 'single phasing'	If motor hums but does not turn, check motor wiring and line fuses.
	Motor voltage too low	Supply voltage should be +/- 10% of the rating at the motor terminals.
	Tank vent plugged	If supplied, remove solid plug from tank and insert vent plug.
	Suction filter clogged	Clean suction filter as described in periodic maintenance.
	Vacuum leak in suction line	Check all fittings in suction line.
	Down valve may be energized	Check wiring to down-valve, and solenoid in the valve.
	Missing coupling	Check to insure the coupling has been installed between the pump and motor.
Lift fails to hold	Down valve may be leaking	Remove down valve and inspect for debris which may be preventing it from closing.
	Down valve may be energized	Check the solenoid in the valve with a volt meter.
	Cylinder may be leaking	Check for oil in cylinder in the vent line.
Lift will not lower	Down valve may be de-energized	Check the solenoid in the valve with a volt meter.
	Flow control needs adjustment	Adjust flow control as needed.
Lifts raises too slowly	Voltage may be low	Check voltage at motor to ensure proper voltage is being supplied.
	Foreign material clogging suction filter, breather cap or pressure line	Remove necessary components and clean.
	Pump may be overheating due to insufficient oil	Check oil level and oil viscosity.
Lift lowers too slowly	Down valve may not be fully open or stuck closed	Remove down valve and clean.
	Flow control may need adjustment	Adjust flow control as needed.

Roll-On Level Loaders - ROLL-C - Click to Expand

All ROLL-C Models

PROBLEM	POSSIBLE CAUSE	CHECK THIS
Lift will not raise	Reflector Blocked	Check to ensure nothing is blocking reflector or photoeyes
	Weight of load too heavy	Check actual weight of the load.
	Hydraulic oil level low	When lift is raised as far as possible, oil level should be 3/4' from bottom of tank. When lift is down, 3/4' from top.
	Lift has reached its upper limit	Upper limit switch may need to be adjusted.
	Motor may be 'single phasing'	If motor hums but does not turn, check motor wiring and line fuses.
	Motor voltage too low	Supply voltage should be +/- 10% of the rating at the motor terminals.
	Tank vent plugged	If supplied, remove solid plug from tank and insert vent plug.
	Suction filter clogged	Clean suction filter as described in periodic maintenance.
	Vacuum leak in suction line	Check all fittings in suction line.
	Down valve may be energized	Check wiring to down-valve, and solenoid in the valve.
	Missing coupling	Check to insure the coupling has been installed between the pump and motor.
Lift fails to hold	Down valve may be leaking	Remove down valve and inspect for debris which may be preventing it from closing.
	Down valve may be energized	Check the solenoid in the valve with a volt meter.
	Cylinder may be leaking	Check for oil in cylinder in the vent line.
Lift will not lower	Down valve may be de-energized	Check the solenoid in the valve with a volt meter.
Lift will not lower	Flow control needs adjustment	Adjust flow control as needed.
Lifts raises too slowly	Voltage may be low	Check voltage at motor to ensure proper voltage is being supplied.
	Foreign material clogging suction filter, breather cap or pressure line	Remove necessary components and clean.
	Pump may be overheating due to insufficient oil	Check oil level and oil viscosity.
Lift lowers too slowly	Down valve may not be fully open or stuck closed	Remove down valve and clean.
Lift lowers too slowly	Flow control may need adjustment	Adjust flow control as needed.

Portable Container Tilters - Click to Expand

PTU2 & PTU4 Models

PROBLEM	POSSIBLE CAUSE	CHECK THIS
Tilt platform will not raise	Battery may need charging	Battery volt level.
		Is the charger putting out 12 volts?
		Check that 12 volts is being reached at the motor and motor relay.
		Is the charger operating properly
	Weight of load too heavy	Check actual weight of the load.
	Unit is low on oil	Inside the tank, make sure the oil is full to the elbow in the filler pipe.
	Tank vent may be plugged	Make sure the solid plug is not in place of the vent plug.
	Suction filter may be clogged	Remove and clean the suction filter
	Down valve coil may be energized	Remove the down valve and ensure that it is not being energized when the up button is pushed. Check wiring to the down valvle
Unit elevates but will not hold a load	Down valve coil may be energized	Remove the down valve and ensure that it is not being energized when the up is pushed. Check wiring to the down valve.
	Down valve coil may be energized	Ensure that debris is not holding the down valve plunger open.
	Cylinder may be leaking	Check the vent line for signs of oil.
Unit fails to lower	Down valve may not be energized	Make sure that the coil is energized when the down valve button is pushed.
		Ensure that the down valve itself is shifting and allowing oil to go back to the tank. Do not remove when under pressure.
		Check that nothing is binding, causing the unit not to lower.

Upenders / Tilters - Click to Expand

Upender / Tilter Models

PROBLEM	POSSIBLE CAUSE	CHECK THIS
Machine will not raise	Weight of load too heavy	Check actual weight of the load.
	Motor not running	Check the main disconnect switch, fuses, and wiring to the motor. A 20 amp designated breaker must be supplied for 110V.
	Hydraulic oil level low	When unit is raised as far as possible, oil level should be 3/4' from bottom of tank. When lift is down, 3/4' from top.
	Machine has reached its limit switch	Limit switch may need to be adjusted.
	Motor may be 'single phasing'	If motor hums but does not turn, check motor wiring and line fuses.
	Motor voltage too low	Supply voltage should be +/- 10% of the rating at the motor terminals.
	Tank vent plugged	If supplied, remove solid plug from tank and insert vent plug.
	Suction filter clogged	Clean suction filter as described in periodic maintenance.
	Vacuum leak in suction line	Check all fittings in suction line.
	Down valve may be energized	Check wiring to down-valve, and solenoid in the valve.
	Missing coupling	Check to insure the coupling has been installed between the pump and motor.
The machine fails to hold a load	Down valve may be leaking	Remove down valve and inspect for debris which may be preventing it from closing.
	Down valve may be energized	Check the solenoid in the valve with a volt meter.
	Cylinder may be leaking	Check for oil in cylinder in the vent line.
Machine will not lower	Down valve may be de-energized	Check the solenoid in the valve with a volt meter.
Machine will not lower	Flow control needs adjustment	Adjust flow control as needed.
Machine raises too slowly	Voltage may be low	Check voltage at motor to ensure proper voltage is being supplied.
	Foreign material clogging suction filter, breather cap or pressure line	Remove necessary components and clean.
	Pump may be overheating due to insufficient oil	Check oil level and oil viscosity.
Machine lowers too slowly	Down valve may not be fully open or stuck closed	Remove down valve and clean.
Machine lowers too slowly	Flow control may need adjustment	Adjust flow control as needed.

PalletPal Level Loaders - Click to Expand

PROBLEM	POSSIBLE CAUSE	CHECK THIS
Unit lowers too easily and too early	Springs may be too weak	Check the spring ratings.
Unit lowers too hard and too late	The springs may be too strong	Check the spring ratings.
Top of unit rotates away from me/towards me on its own	Frame of the unit may not be level	Move the unit to a level surface or install the optional adjusting feet to level base frame.
Top of unit bounces	Shock absorber may be damaged	Check for leaks or dents. Replace if necessary.
Excessive “rumble” when the rotating ring is turning	Excessive wear or lack of lubrication to bearings under the turntable	Remove the turntable and replace the bearings.
Wear on the underside of the turntable	This is a normal condition caused by work-hardening of metal	No repair is necessary.

Product Brochures

Southworth (Shanghai) Lift Table Co., Ltd. Address: #1106, Building 1, XIZI International Center, 898 Xiuwen Road, Shanghai, China. PRC: 201199

E-mail: sales@southworth-apac.com

TEL:+86 021-33361299

Productivity Audit

Productivity and safety recommendations from a Southworth expert

WeChat Official Account

Related Information:

Rotating Table Ground Platform Loading Dock Southworth U.S

SOUTHWORTH (SHANGHAI) LIFT TABLE CO., LTD
TEL: +86 021 57491919 | FAX: +86 021 57494281 | Site Map | 沪ICP备07027643号-1 |沪公网安备 31011202014811号