Manuals - Autoquip Corporation
Contents
1. Model Low Lift Axle Load Axle Load Platform Base Max Ship Ht Cap Capacity Capacity Size Frame Travel Wt In Ibs Over Opposite In Size In Bridge Bridge In End End Ibs Ibs PDQ 40 41 2 4 000 2 000 2 000 60 x 80 76 x 84 55 1 2 2 700 PDQ 50 41 2 5 000 3 000 3 000 60 x 80 76 x 84 55 1 2 2 800 PDQ 60 41 2 6 000 3 000 3 000 60 x 80 76 x 84 55 1 2 2 900 NOTE All PDQ Models have a standard 5 HP motor 230 60 3 with a nominal standard speed of 15 fpm and have two rams All PDQ Scissors Lifts have a rollover capacity equal to twice the lifting capacity when in the fully lowered position The PDQ can handle pallets carats electric walkie and hand trucks Although the PDQ is designed to unload freight it can also be used for loading Using a PDQ one person can load or unload a full trailer safely in 25 to 30 minutes using a pallet jack LOAD CAPACITY The load capacity rating is stamped on a metal plate attached to the lift This figure is a net capacity rating for a lift furnished with the standard platform The relief valve of the pumping unit has been set to raise the weight plus a small amount for overload Where gravity roll sections special tops etc are installed on the lift after leaving the plant deduct the weight of these from the load rating to obtain the net capacity Lifts should not be overloaded beyond the established capacity as dama2. 1 O lt Li A 1 Y POWER UNIT CONTRACTOR PLT 2 Figure 14 Contractor Power Uni 3 TROUBLESHOOTING ANALYSIS AN DANGER To avoid personal injury NEVER go under the lift platform until the load is removed and the scissors mechanism is securely blocked in the open position See Lift Blocking Instructions section PROBLEM POSSIBLE CAUSE AND SOLUTION Lift does not raise e The motor voltage wiring may be incorrect e The hydraulic line or hose may be leaking e Oil in the reservoir may be low Add oil as necessary See the Routine Maintenance section e The load may exceed the rating See the Specifications section e The suction filter may be clogged Remove and clean the filter Drain and replace the oil e The breather holes in the reservoir fill cap may be clogged Remove and clean e The Down valve may be energized by faulty wiring or stuck open Remove the solenoid and check e The power unit pump may be defective e The structural members of the lift may be in a bind e The manual lowering device may be engaged Lift seems bouncy during e There may be air in the hydraulic system operation Bleed the air from the cylinder e Oil in the reservoir may be low Add oil as necessary See the Routine Maintenance section e The power unit suction strainer may be clogged e There may be foreign material on the roller plate 33 TROUBLESHOOTING A
3. 14 LU Z Lu V 1VvLlad 01719 x 9NDIOVd 1039 INIHSNA TIHYVY 38N1 439VdS Tr s a 0008 1331s 0393022007 t h YIHSYM IM 43033148 WIG 7 1 YIONNTd NYY 9 034 Z NOINNNYL DNIMOVd 745 ONIY dNXOYA aama ssv19 YY ON AYND ONISVO Wa vii Nese ONIHSNG 11479 INAWAOV1d3Y WAS 802 NOILISOd CILOVALIY NI YSONN1d WY dOLS AN3 308 Figure 10 Ram Detail 25 GENERAL MAINTENANCE VELOCITY FUSE REPLACEMENT A DANGER Do not attempt to remove the velocity fuse until the lift is securely supported with the maintenance locking devices and all hydraulic pressure has been removed from the lifting cylinders and hydraulic hoses Failure to follow these instructions could result in personal injury or death Never attempt to take a velocity fuse apart and repair it These are precision devices that are factory assembled under exacting conditions Velocity fuses should always be replaced 1 The arrow on the exterior surface of the velocity fuse shows the direction of the restriction to the oil flow The arrow should always point away from the cylinder
4. 24002511 Molykote Washer 30600613 Motor 5 HP 208 230 460 60 3PH 3450 RPM tang shaft 32701290 Solenoid Coil 24VAC 32701300 Solenoid Coil 115VAC 35150080 Control Panel 208 230V 115 VAC 3 phase 36201820 Push Button NEMA 4 40200630 Pump 2 99 pm tang 41800582 Velocity Fuse 6 0 GPM 42300467 Ram assembly 1 diameter x 56 stroke 45400082 Retaining Ring 1 1 8 45400108 Retaining Ring 1 _ 45400207 Retaining ring heavy duty 45400223 Retaining Ring 1 1 8 heavy duty 45502234 Packing Set 45910104 Dyna Seal _ 41050139 Sump Strainer 47701640 Filler Breather 52500154 Base Clevis Pin 52500253 Leg Roller Pin 52502010 Pin x3 long 52503182 Platform Clevis Pin 1 1 8 x 3 3 8 long 52600269 Leg Roller Assembly 60950003 Dolly Handle 31 NOTES 1 APPROXIMATE OVERALL DIMENSIONS OF POWER UNIT 24 X 17 X 11 HIGH MOUNTING BRACKETS SUITABLE FOR FLOOR OR WALL MOUNTING 4 1 GAL USABLE WALL MOUNT 3 8 GAL USABLE FLOOR MOUNT 473 0288 0 FILLER BREATHER 477 0164 0 306 861 3 CONTROLLER 78 X Z X 10 HIGH SHIPPED LOOSE 351 5998 9 208 230V 351 5098 1 460 Al WALL 117 PENDANT S 6 GAL 9 X 9 x 18 P B STATION POLYETHYLENE TANK FLOW CONTROL SHIPPED LOOSE 642 0102 0 415 0284 0 367 8182 0 WALL MOUNT SHOWN PUMP Z 02 0063 0 DOWN Ba SOLENOID A gt 327 8129 9 er 0 i N x lt o Z 1
5. Identifies a hazardous situation that presents the imminent probability of death or of severe personal injury AN WARNING Identifies a hazardous situation that has the potential of causing death or serious personal injury CAUTION Identifies a hazardous situation that could lead to the possibility of personal injury of death and or may result in equipment damage DANGERS WARNINGS amp CAUTIONS Read and understand this manual and all labels prior to operating or servicing the lift All labels are provided in accordance with ANSI 2535 4 A DANGER Do not work under lift without maintenance device To avoid personal injury NEVER go under the lift platform until the load is removed and the scissors mechanism is securely blocked in the open position See Lift Blocking Instructions section AN DANGER To avoid personal injury stand clear of scissors leg mechanism while lift is in motion 71 DANGER Do not install the lift in a pit unless it has a bevel toe guard or other approved toe protection A shear point can exist which can cause severe injury to the foot A DANGER HIGH VOLTAGE Disconnect and or lock out the electrical supply to the power unit prior to any maintenance being performed DANGERS WARNINGS amp CAUTIONS AN DANGER Extending the platform length or width beyond the factory limit could cause the unit to tip which could result in personal injury or death A DANGER Do not attempt
6. 14 8 AMPS 7 4 AMPS NOTE 115V 1ph 60Hz operation is not recommended If 115V 1ph operation is absolutely required the lift will function properly if adequate power is supplied However it is very sensitive to deviations from the required power Consequently performance could prove unsatisfactory To assure proper operation on 115V 1ph 60Hz power supply a separate circuit protected by a 30 AMP time delay circuit breaker and adequate wiring should be provided to allow and actual 115V at the power cord plug during fully loaded operation Specify if required AIR BLEEDING PROCEDURE 1 Press and hold the UP button release when the unit has raised halfway up 2 Crack the bleed screw on top of the cylinder until clear oil no bubbles comes from the cracked bleed screw 3 Tighten the screw make sure no oil comes from the screw when it is tightened 4 Clean up any spilled oil Used oil should be discarded as it may contain flushed contaminates from the line NOTE A small amount of air may remain in the cylinder but it will be flushed back to the reservoir after a few operations of the system 22 GENERAL MAINTENANCE CYLINDER AND OR SEAL REPLACEMENT Cylinder Removal 1 2 Lower the lift to the fully lowered position Continue to hold the DOWN button an additional 10 seconds after the lift has stopped traveling downward to relieve the system pressure Always shut off the main electr
7. To remove the maintenance locks raise the platform by activating the UP valve to provide sufficient clearance for the removal of the maintenance locks A DANGER Maintenance locks that are bent damaged or non functional must be replaced immediately to avoid personal injury Contact the Autoquip Service Department for replacement parts and installation instructions 13 LIFT BLOCKING INSTRUCTIONS FLP OVER MAINTENANCE LOCKSSHOWN IN PLACEON BOTHSIDES OF BASE FRAME Figure 8 Maintenance Lock INSTALLATION INSTRUCTIONS The PDQ is easy to install and operation It is completely self contained and ready to go as soon as the unit is received The control is centrally located on the platform to allow operation from either end All electrical components and wiring are in accordance with the National Electrical Code Loads can be quickly rolled over the hinged throw over bridge onto the platform The bridge automatically rises into the up position as the platform lowers serving as a wheel chock to help eliminate the danger of shifting loads In the lowered position the platform is 4 _ from the ground No pit is required and the unit can be used to service several locations The portability wheels are large enough to facilitate ease of movement and to minimize damage to surfaces The PDQ may be used inside or outside It requires no lagging and is completely weatherproof 1 Wire the heavy duty power cord onto a plug suit
8. from the switch deactivates the DOWN circuit The oil stops flowing from the cylinders and the downward movement will stop 71 CAUTION Do not continue to activate the UP button if the lift is not raising or if it has reached the fully raised position To do so may result in permanent damage to the lift 71 CAUTION Do not operate the power unit on relief for more than a few seconds When on relief the valve will make an audible squealing sound 16 OPERATING INSTRUCTIONS PORTABILITY The portability set is provided on the PDG as a means of moving the lift from one location to another without a load on the lift The portability wheels are located on each side of the lift where the lifting cylinder is mounted to the lift platform See Figure 9 Each lift is supplied with a Dolly T Handle that is also necessary for making the unit portable 1 Raise the lift approximately half way 2 Flip the portability wheels on the platform over to a vertical hanging position 3 Lower the lift until the base frame at the cylinder end picks itself off of the floor approximately one inch 4 The lift can then be moved by pulling or pushing on the T handle To disengage the portability set 1 Lift the T handle to a vertical position and remove it from under the tang Be careful as the handle will have a tendency to pull away as the base is lowered to the floor 2 Raise the lift approximately half way and rotate
9. to remove the velocity fuse until the maintenance locks securely support the lift and all hydraulic pressure has been removed from the lifting cylinders and hydraulic hoses Failure to do so could result in personal injury or death N WARNING Do not operate this equipment without handrails and snap chains in place WARNING Under no circumstances should the speed control orifice be removed from the Deltatrol to obtain faster lowering speed A loaded lift can reach dangerous and destructive speed WARNING All warning and information decals should be in place as outlined in the Label Identification section If decals are missing or damaged they should be replaced with new ones Contact an Autoquip representative for replacements DANGERS WARNINGS amp CAUTIONS N CAUTION Never run the pump for more than a couple of seconds without pumping oil This applies to low oil conditions improper motor rotation running the pump against the relief pressure after the lift is fully raised against the physical stops running overloaded beyond capacity or running at reduced speed because of pinched or obstructed hydraulic lines N CAUTION Do not continue to depress the UP button on the controller if the lift is not raising or if the lift has reached the fully raised position To do so may result in permanent damage to the motor or pump CAUTION Do not operate the power unit on relief for more than a few se
10. with new parts 3 The pin or roller bushing should be replaced whenever excessive wear is detected The rollers are furnished with the pressed in bushing as a unit part A DANGER To avoid personal injury NEVER go under the lift platform until the load is removed and the scissors mechanism is securely blocked in the open position POWER UNIT DANGER HIGH VOLTAGE Disconnect and or lock out the electrical supply to the power unit prior to any maintenance being performed 1 The Contractor Power Unit utilizes a Super Torque intermittent duty one full lift cycle per four minute period 5 HP 208 230 04 460 Volts 60 hertz 3 phase motor driving a high pressure positive displacement pump assembly with internal relief check and dump valves 2 Because Autoquip Super Torque motors actually deliver substantially more horsepower than their nameplate rating they must always be wired for heavier current draw than standard motors of the same nameplate rating However because of the Super Torque motor s starting efficiency and superior running characteristics circuit components do not have to be as large as for standard motors of equal delivered horsepower 21 GENERAL MAINTENANCE The following chart should be referenced in connecting these motors to power sources remembering that heavy wire must be used all the way to the power source 5 HP 208 Volts 230 Volts 460 volts Full Load Amperages 15 8 AMPS
11. 2 Do not use Teflon tape on the threaded connections of a velocity fuse Tape fragments can cause malfunctioning of the fuse 3 Check all fitting connections for hydraulic leaks and tighten as necessary HOSE ORIENTATION To prevent damage to the cylinder hose and possible failure of lift it is necessary to establish a correct hose shape and pattern of movement as follows 1 Raise the lift to its full height and block securely See Lift Blocking Instructions 2 Install one end of the new hose to the cylinder elbow fitting 3 Since the hose is fixed at both ends it is possible to put a twist in the hose that will allow it to describe the same pattern each time the lift is operated 4 Lower the lift carefully and check to see that the hose is free and clear of the cylinder and the leg assembly If not twist the hose in the direction necessary to clear it of any obstruction and then lock the swivel fitting securely 26 GENERAL MAINTENANCE ROCK SALT It has been discovered that rock salt is being used to melt the ice and snow off of the platforms in the northern region and during the winter months Rock salt will accelerate the deterioration of any paint Therefore Autoguip recommends the use of a synthetic Ice Melt product in lieu of rock salt Warranty on the paint finish will be denied when it is suspected that rock salt has been used Please contact the Product Support Team at Autoquip at 1 888 811 9876 or
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13. INSTALLATION OPERATION AND SERVICE MANUAL PDQ PORTABLE DOCK SCISSORS LIFT CORPORATION P O Box 1058 e 1058 West Industrial Avenue e Guthrie OK 73044 1058 e 405 282 5200 e FAX 405 282 8105 e www autoquip com Item 830PDQ Version 1 0 09 2001 TABLE OF CONTENTS Identification and Inspection 3 Dangers Warnings and Cautions 4 Label Identification 8 Specifications 11 Lift Blocking Instructions 13 Installation Instructions 15 Operating Instructions 16 Routine Maintenance 19 General Maintenance 21 Replacement Parts List 31 Troubleshooting Analysis 33 IMPORTANT Please read and understand this manual prior to installation or operation of this lift Failure to do so could lead to property damage and or serious personal injury If questions arise call a local representative or Autoquip Corporation at 1 888 811 9876 or 405 282 5200 PLANNED MAINTENANCE PROGRAM A local Autoquip representative provides a Planned Maintenance Program PMP for this equipment using factory trained personnel Call a local representative or Autoquip Corporation at 1 888 811 9876 or 405 282 5200 for more information IDENTIFICATION amp INSPECTION IDENTIFICATION When ordering parts or requesting information or service on this lift PLEASE REFER TO THE MODEL AND SERIAL NUMBER This information is on a nameplate attached to the leg assembly Replacement parts are available from a local Autoquip distributor INSPECTION Immediately upon r
14. NALYSIS PROBLEM POSSIBLE CAUSE AND SOLUTION Lift will not lower The down solenoid may be malfunctioning The maintenance device 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 The velocity fuse may be locked Do not attempt to remove the velocity fuse The following steps should be followed 1 Remove the load from the lift Inspect all fittings hoses and other hydraulic components for leads or damage 2 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 lift starts to lower continue pressing the DOWN button until the lift is in the fully lowered position 3 If the lift 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 the lift is in the fully lowered position 4 Once the lift 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 lift to 50 of its rated travel then low
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16. able for three phase duty 2 Check to ensure there is proper pump rotation 15 OPERATING INSTRUCTIONS Familiarize yourself with this operator s manual before operating the eguipment 1 Scissors lifts have maximum lifting capacity ratings see Specifications section The safety relief valve has been factory set to open at a pressure slightly above the rated load capacity and allows the oil to bypass into the reservoir to prevent damage to the lift and its hydraulic power unit The safety relief valve should not be adjusted for any reason as it could cause the motor to prematurely burn out Applying loads exceeding the rated capacity of the lift may result in excessive wear and damage to the lift 2 This type of lift is designed primarily for dock applications and is typically furnished with constant pressure pushbutton controls Actuating the UP button will cause oil to enter the cylinders and the lift will rise 3 When the desired height or upward travel of the platform is attained removing pressure from the switch deactivates the UP circuit button The oil stops flowing and the upward movement will stop 4 To lower the lift activate the DOWN button Opening the down control valve allows the oil in the cylinders to flow through the down valve at a controlled rate and return oil to the reservoir 5 When the desired height or downward travel of the platform is attained removing the operator s foot or hand
17. conds When on relief the valve will make a squealing sound AS CAUTION Precautions should be taken to prevent the introduction of contaminates such as dirt or other foreign material into the system through open fittings pipes or disassembled components Contamination will ruin the hydraulic system 71 CAUTION Use only approved oils in the lift See Specifications section LABEL IDENTIFICATION D Figure 1 Label Placement PDQ Scissors Lift Item No Qty Description Part No 1 2 Caution Familiarize Yourself With Operators Manual 36401487 2 3 Danger Do Not Put Hands Or Feet 36430050M 3 1 Autoquip Serial Number Nameplate 36401511 4 1 Fill with Recommended Oils Only 36400661 5 1 Capacity 36401594 6 1 Black amp Yellow Striped Tape 06100010 LABEL IDENTIFICATION Note Labels shown here are not actual size FAMILIARIZE YOURSELF WITH OPERATORS MANUAL BEFORE OPERATING THIS EQUIPMENT Figure 2 Label 36401487 CUT LINE I Figure 3 Label 36430050M Figure 4 Label 36401511 LABEL IDENTIFICATION Figure 5 Label 36400661 Autoguip 000 LBS CAPACITY _ Figure 6 Label 36401594 JUSS W NUUS HAL St Maa na OK 7J044 4 WWW au TOOQUIP C OA Figure 7 Label 06100010 SPECIFICATIONS
18. eceipt of the lift a visual inspection should be made to determine that it has not been damaged in transit Any damage found must be noted on the delivery receipt In addition to this preliminary inspection the lift should be carefully inspected for concealed damage Any concealed damage found that was not noted on the delivery receipt should be reported in writing to the delivering carrier within 48 hours The following is a checklist that will aid you in the inspection of this lift 1 Examine entire unit for any signs of mishandling Pay special attention to the power unit and pushbuttons 2 Thoroughly examine all connections making sure they have not vibrated loose during transit and inspect wiring for any signs of damage 3 After installation raise the lift and inspect the base frame platform scissors assembly and cylinder plumbing connections DANGERS WARNINGS amp CAUTIONS SAFETY ALERTS Required Reading The following SAFETY ALERTS are intended to create awareness of owners operators and maintenance personnel of the potential safety hazards and the steps that must be taken to avoid accidents These same alerts are inserted throughout this manual to identify specific hazards that may endanger uninformed personnel Identification of every conceivable hazardous situation is impossible Therefore all personnel have the responsibility to diligently exercise safe practices whenever exposed to this equipment AN DANGER
19. ering Bleed air from the bleeder screws on top of the cylinders Should the above steps not correct the problem contact Autoquip to obtain instruction for further action 34 TROUBLESHOOTING ANALYSIS PROBLEM Lift raises slowly POSSIBLE CAUSE AND SOLUTION The structural members of the lift may be binding The tubing or hose is obstructed or broken Where pipe is used check for obstruction in the line The hydraulic line or hose may be leaking The oil viscosity is not suited for the environmental conditions Refer to Routine Maintenance section for oil recommendations Check the oil level in the reservoir The motor voltage wiring may be incorrect The suction filter may be clogged Remove and clean the filter Drain and replace the oil The breather holes in the reservoir fill cap may be clogged Remove and clean The power unit pump may be defective Lift lowers slowly The structural members of the lift are binding The tubing or hose is obstructed or broken Where pipe is used check for obstruction in the line The oil viscosity is not suited for the environmental conditions Refer to Routine Maintenance section for oil recommendations The return filter may be clogged due to dirt or damage 35 TROUBLESHOOTING ANALYSIS PROBLEM POSSIBLE CAUSE AND SOLUTION Lift will not remain in e The cylinder packing may be leaking raised position e The
20. ge and or personal injury may result 11 SPECIFICATIONS UNBALANCED LOADING The stabilization provided is basically for balanced loads If special attachments extend beyond the length and or width dimensions of the platform the end and or side load capacity must be reduced contact an Autoquip Sales representative PUMP PRESSURE This lift incorporates a positive displacement pump machined to a high degree of accuracy and specially adapted to requirements of higher pressure ranges over that of a standard pump Therefore standard factory models of the same manufacture cannot replace it 12 LIFT BLOCKING INSTRUCTIONS 1 Remove all load from the platform Never block the lift when loaded 2 Raise the platform sufficiently for the base rollers to rollback past the flip over maintenance locks located on the base frame of the lift 3 Engage both maintenance locks by flipping them into the base frame see Figure 8 4 Lower the platform until the base rollers come into contact with and rest against the maintenance locks Always hold the DOWN switch a few seconds more until all pressure is gone and the platform is supported entirely and safely by the maintenance locks 5 Always shut off the main electrical switch when blocked to prevent someone from turning it on A DANGER To avoid personal injury NEVER go under the platform until the load is removed and the lift is securely blocked in the open position 6
21. ical switch when maintenance is to be performed Unbolt the two hex head bolts that connect the cylinder to the platform Disconnect the hydraulic hose from the cylinder A WARNING Do not remove the base clevis pin This will cause the lift to collapse While protecting the cylinder rod from damage pry upward and outward on the cylinder rod Seal Replacement 1 2 Lay the ram assembly on its side To access the seal push the rod down inside the casing past the seals by threading a bolt into the end of the rod and simply pushing on the bolt Take all precautions not to scratch the cylinder rod Remove the old seal ring and backup ring Inspect the seal groove for nicks and scratches that could affect the seal Remove as necessary Clean the groove thoroughly and install the new seal and backup Lubricate the seal with clean oil or grease Grasping the bolt in the end of the cylinder rod pull the rod out of the casing taking precaution against pinching or tearing the seal ring 23 GENERAL MAINTENANCE Re Installing the Cylinder 1 Reinstall the new cylinder in the reverse procedure of the above instructions 2 Once the cylinder is in place and all hydraulic connections are made tight proceed to bleed air out of the system see Air Bleeding Procedure section 3 Check the oil level 4 Clean up any debris and or spilled oil from the area 24 LU O Z lt Z 1 lt lt LA lt
22. il hydraulic fluids brake fluids or automatic transmission fluid 19 ROUTINE MAINTENANCE Oil Viscosity Recommendations Environment Ambient Temperatures Recommended Oil Indoor location variable temperatures 30 100 F 10W30 or 10W40 Multiviscosity motor oil Indoor location consistent SAE 20W motor oil Temperatures 70 F Outdoor location 10 100 F SAE 5W30 Multiviscosity motor oil Cold storage warehouse 10 40 F Freezer 40 F to 0 F 5W30 Multiviscosity motor oil Consult Factory OIL CAPACITY Reservoir capacity for the contractor polyethylene tank is approximately five gallons The oil level in the reservoir should be 1 to 1 _ below the top of the reservoir with the lift in the fully lowered position PIPE THREAD SEALANT Loctite PST 567 pipe thread sealant or equivalent is recommended Do not use Teflon tape Tape fragments can cause malfunctioning of the hydraulic system 20 GENERAL MAINTENANCE 1 Change oil once a year or when it materially darkens or feels gritty Also check oil for the presence of water oil will turn milky in color 2 NEVER TRY TO DISASSEMBLE OR REPAIR A PUMP IN THE FIELD These pumps are high precision devices requiring extreme precision in fit up When one is damaged there is seldom anything that can be repaired in the field It is also more economical to replace a pump than to refit old parts
23. pump regulator is not seating e The pump check valve is not seating e The hydraulic tubing hose or fitting is leaking oil e The return filter may be clogged 36
24. the portability wheels on the platform to their raised and stored position The lift can then be operated in a normal manner NOTE The lift should not be used for loading or unloading with the wheels in the portability position 17 OPERATING INSTRUCTIONS Figure 9 Portability Wheel Details ROUTINE MAINTENANCE Normally scissors lifts will reguire very little maintenance However a routine maintenance program could prevent costly replacement of parts and or downtime AN WARNING To avoid personal injury NEVER go under the lift platform or perform any maintenance on the lift until the load is removed and the scissors mechanism is securely blocked in the open position See Lift Blocking Instructions section MONTHLY INSPECTION 1 Check oil level see oil recommendations in this section and add appropriate oil when necessary Check for any visible leaks Correct as necessary Check any unusual noise when it occurs Determine the source and correct as necessary Check the snap rings at all rollers if not in place and or secure replace or repair immediately Check all rollers for signs of wear Replace as necessary Do not grease roller or axles they have lifetime lubricated bearings Check all wiring for looseness or wear Repair at once OIL REQUIREMENTS Change oil yearly or more frequently if it darkens materially or feels gummy or gritty Use detergent motor oils only Do not use hydraulic jack o
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