Air Force Lift Installation, Operation and Service Manual
Contents
1. Lift does not lower or lowers very slowly Make sure the inlet outlet and exhaust lines are connected to the correct ports on the hand or foot control valve It may be that an obstruction was introduced into the system during installation Check for obstructions at the outlet of the control valve in the exhaust line from the control valve if applicable or in the connecting hose to the lift Make sure the if the lift was raised and blocked open for maintenance that the flip over maintenance locks were removed from the path of the lift rollers and placed back in the home position 222. INSTALLATION OPERATION AND SERVICE MANUAL AIR FORCE LIFT Item 830AFB Version 1 0 02 20 01 TABLE OF CONTENTS Identification and Inspection 3 Dangers and Warnings 4 Label Identification 6 Specifications 10 Lift Blocking Instructions 11 Installation Instructions 12 Operating Instructions 13 Routine Maintenance 14 General Maintenance 15 Replacement Parts List 20 Troubleshooting Analysis 21 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 any 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 receipt 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
3. e Make sure the air supply line is connected to the correct port on the hand or foot control valve It is marked Inlet e t may be that an obstruction was introduced into the system during installation Check for obstructions at the inlet of the control valve in the connecting hose to the lift and at the restrictor in the bottom of the air bag Lift drifts down slowly during e Make sure all of the connections are tight and that non operation no leaks are occurring in the system Lift seems bouncy during e This is normal for large volume air bag air powered operation systems due to the compressible nature of air especially at raised elevations between fully lowered and fully raised positions 21 TROUBLESHOOTING ANALYSIS PROBLEM POSSIBLE CAUSE AND SOLUTION Lift raises very slowly The primary cause of slow actuation in air powered systems is a lack of air volume cubic feet per minute CFM to the lift Determine the air volume of the air supply system compressor For the lift to operate at reasonable speeds 20 30 seconds raising time the lift needs to have a minimum of five CFM Make sure all connections are tight and that no leaks are occurring in the system It may be that an obstruction was introduced into the system during installation Check for obstructions at the inlet of the control valve in the connecting hose to the lift and at the restrictor in the bottom of the air bag
4. 2 500 36x48 36 48 9 5 33 5 3 38 1 80 psi 820 24AF25 2 24 2 500 36 x 48 48 X 48 9 5 33 5 3 38 1 80 psi 860 24AF25 3 24 2 500 36 48 48 54 9 5 33 5 3 38 1 80 psi 880 24AF25 4 24 2 500 36 x 48 48 X 60 9 5 33 5 3 38 1 80 psi 900 24 50 1 24 5 000 36 x48 48 X 48 9 5 33 5 3 38 2 80 psi 880 24AF50 2 24 5 000 36 x 48 48 X 54 9 5 33 5 3 38 2 80 psi 900 24AF50 3 24 5 000 36 x48 48 X 60 9 5 33 5 3 38 2 80 psi 920 LOADING The scissors lifts have the load capacity rating stamped on a metal plate attached on one side of the lift This figure is a net capacity rating for a lift furnished with the standard platform In the event that 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 Damage may result if the lifts are overloaded beyond the established capacity UNBALANCED LOADING The stabilization provided is basically for balanced loads Due to the fact that the lift is designed to operate without having to be lagged to the floor special attachments that extend beyond the length and or width dimensions of the platform should be avoided This will prevent unintentional tipping of the lift that could lead to damage of the equipment or personal injury 10 LIFT BLOCKING INSTRUCTIONS T Remove all load from the platform Nev
5. 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 in the inspection of this lift 1 Examine the entire unit for any signs of mishandling 2 Pay special attention to the air bag and hosing Thoroughly examine all connections making sure they have not vibrated loose during transit 4 After installation raise and block the lift and inspect the base frame scissors assembly and air bag See the Lift Blocking Instructions section DANGERS WARNINGS amp CAUTIONS Read and understand this manual and all labels prior to operating or servicing this lift All labels are provided in accordance with ANSI 2535 4 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 the Lift Blocking Instructions section N DANGER To avoid personal injury stand clear of scissors leg mechanism while lift is in motion N DANGER Do not inflate air bags to more than 80 PSI DANGERS WARNINGS amp CAUTIONS AN WARNING NEVER stand sit or ride on the lift N WARNING All warning and information decals should be in place as outl
6. city vs Air Pressure Model 24AF25 18 24 GENERAL MAINTENANCE 1000 LIFIINSCAPACITY vs AR PRESSURE RATED CAPACITY 5000 80 PSI MAX OFERATING PRESSURE 40 PSI 6 12 18 24 LIFTTRAVEL INGIES Figure 14 Lifting Capacity vs Air Pressure Model 24AF50 19 REPLACEMENT PARTS LIST Part Number Description 40730750 Airbag Actuator 41401159 3 way 3 position _ air valve foot operated 41401600 Foot Guard 41701368 Relief Valve 50 200 PSI 47900006 Breather Plug _ hex 52504781 Clevis Pin 7 8 x1 52504790 Roller Axle Pin 1 1 8 52601590 Roller Assembly with Bushing 20 TROUBLESHOOTING ANALYSIS WARNING 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 the Lift Blocking Instructions section PROBLEM POSSIBLE CAUSE AND SOLUTION Lift does not raise e The load may exceed the rating for the specific line pressure Refer to the performance curves shown in the Lifting Capacity vs Air Pressure curves in the General Maintenance section e There may not be enough or any line pressure Check the supply pressure with a gauge and ensure it provides the minimum pressures required as shown in the performance curves shown in the Lifting Capacity vs Air Pressure curves in the General Maintenance section
7. eg see the Lift Blocking Instructions section 8 Cycle the lift 10 to 15 times to ensure it is working properly 9 LAST BUT NOT LEAST Clean up the area It s part of the job as a service technician and reflects on the work performed NOTE This job should require one to two hours of time depending on the experience of the service technician 15 GENERAL MAINTENANCE 9 FA EM tn FRAME x 264 0818 1 PLUMB TO COUPLING pU Ef PROVIDED IN BRSE FRRME Ol MG V 261 4015 2 264 0210 1 261 4015 2 414 8101 9 479 0048 0 Figure 11 Foot Valve Connections 16 GENERAL MAINTENANCE OPTIONAL AIR BAG QUICK EXHAUST VALVE ACTUATOR D N 14111 AIR CONTROL HLVE BY OTHERS RELIEF VALVE D AIR SUPPLY 85 PSI 80 PSI REQUIRED iD UNLESS OTHERWISE SPECIFIED SPECIFIED EXHRUST EXHRUST PNEUMATIC SCHEMATIC AIR BAG LIF Figure 12 Pneumatic Schematic 17 GENERAL MAINTENANCE LIFTING CAPACTIY vs AIR PRESSURE 15 RATED CAPACITY 2500 80 PSI OPERATING FRESSURE 40 PSI 6 12 18 LIFTIRA VEL INCHES Figure 13 Lifting Capa
8. er block the lift when loaded only when empty 2 Raise the lift platform sufficiently to install the maintenance leg Begin lowering the platform by activating the DOWN valve until the maintenance leg is captured by the socket on the underside of the platform and the locating disc on the base frame Continue activating the DOWN valve five to ten seconds to relieve the air pressure in the air bag 4 Always shut off the main air supply when blocked to prevent someone from turning it on 5 To remove the maintenance leg raise the platform by activating the UP valve to provide sufficient clearance for the removal of the maintenance leg AN WARNING 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 11 INSTALLATION INSTRUCTIONS 1 Make sure installation area is clean before starting 2 If the permanent air supply work is not complete some means of temporary lines with an on off device for the air supply should be set up for testing purposes 3 Place the lift in the installation area N CAUTION When moving the lift do not attempt to pick it up by the platform it is hinged and could be damaged Pick up from under the base frame ONLY 4 Make temporary air connections Raise the lift to the top of its travel and make positioning adjustments Check for the proper height If needed shim to the desired
9. foot or hand from the valve deactivates the UP valve The air stops flowing into the bag and the upward movement will stop To lower the lift activate the DOWN portion of the control valve which allows air to exhaust to the atmosphere Opening the down control valve allows the air in the air bag to flow through the down valve at a controlled rate and exhaust to the atmosphere When the desired height or downward travel of the platform is attained removing the operator s foot or hand from the valve deactivates the DOWN valve The air stops flowing from the bag and the downward movement will stop N CAUTION Do not continue to activate the UP valve 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 13 ROUTINE MAINTENANCE Normally scissors lifts will require 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 the Lift Blocking Instructions section Monthly inspection should consist of the following 1 Check for visible air leaks correct as necessary 2 Check any unusual noise when it occurs Determine the source and correct as necessary 3 Check the snap r
10. height AN WARNING Block scissors mechanism in the raised position prior to working under lift See the Lift Blocking Instructions section 5 If the decision is made to lag the lift to the floor the base frame of the lift has drilled holes for lagging the lift Mark the holes drill and install with anchors 6 Make permanent air connections and operate the lift through a few cycles T Clean up any debris from the area A clean installation makes a good impression and creates a much safer environment N WARNING All DANGER WARNING and CAUTION labels and informational decals and plates must be intact and in place on the lift Contact an Autoquip representative if labels are missing or damaged See the Label Identification section 12 OPERATING INSTRUCTIONS Scissors lifts have a maximum lifting capacity see Specifications section The safety relief air valve has been factory set to open at a point slightly above the rated load and allows the air to bypass into the atmosphere Lowering loads exceeding the rated capacity of the lift may result in excessive wear and damage to the lift This type of lift is designed primarily for in plant applications and is furnished with constant pressure foot valve or hand valve controls Actuating the UP valve will cause air to enter the air bag and the lift will rise When the desired height or upward travel of the platform is attained removing the operators
11. ined in the Label Identification section If decals are missing or damaged they should be replaced with new ones Contact an Autoquip representative for replacements CAUTION When moving the lift do not attempt to pick it up by the platform it is hinged and could be damaged Pick up from under the base frame ONLY AN CAUTION Do not continue to activate the UP valve 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 LABEL IDENTIFICATION 2 5 2 Y E ES J ORO A Figure 1 Label Placement Diagram Air Force Lift Label Information Item No Qty Description Part No 1 2 Danger Do Not Put Hands or Feet 36430050 2 2 Capacity 36405710 3 2 Caution Familiarize Yourself with Operators Manual 36401487 4 1 Do Not Inflate To More Than 80 PSI 36401628 B 1 Leg Socket 36400265 6 1 Maint Device 36400257 7 1 Autoquip Serial Number Nameplate 36401511 8 2 Lifting Capacity vs Air Pressure model 24AF25 36405810 9 2 Lifting Capacity vs Air Pressure model 24AF50 36405820 LABEL IDENTIFICATION Note Labels shown here are no
12. ings at all rollers if not in place and or secure replace or repair immediately 4 Check all rollers for signs of wear Replace as necessary 5 Do not grease roller or axles they have lifetime lubricated bearings 6 The lift has a safety relief valve which is factory pre set The relief valve should not be adjusted for any reason as it could cause the lift to fall uncontrollably 14 GENERAL MAINTENANCE AIR BAG REMOVAL AND REPLACEMENT AN WARNING 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 the Lift Blocking Instructions section 1 Engage the maintenance leg See the Lift Blocking Instructions 2 Continue to hold the DOWN valve after the lift has stopped traveling downward to relieve the system air pressure 3 Disconnect the air bag by removing the four bolts that attach the bag to the base and leg assembly 4 Remove the air bag hosing and remove the bag from the lift 5 Re installation of air bag assembly is the reverse of above procedure 6 After checking all pins mechanical components and air control components to make sure everything is completely assembled and in working order it is a good idea to check the lag bolts for tightness 7 Turn on the air supply and press the UP valve Raise the lift and check for any air leaks If everything checks out all right remove the maintenance l
13. t actual size Do rod pul hands nel work not stand DA NG ER leet der lop 2 Figure 2 Label 36430050 MAX CAPAQTY 000 5 LIFT CAPACITY DECREASS AS PLATFORM RAISES SEE MANUAL 00 NOT OVERLOAD OVERLOADIN CAN CAUSE LIFT TO DESCEND UNCONTROLLABLY Figure 3 Label 36405710 FAMILIARIZE YOURSELF WITH OPERATORS MANUAL BEFORE OPERATING THIS EQUIPMENT Figure 4 Label 36401487 Figure 5 Label 36401628 7 LABEL IDENTIFICATION Figure 6 Label 36400265 Figure 7 Label 36400257 Figure 8 Label 36401511 LABEL IDENTIFICATION LIFTING CAPACITY AR PRESSURE T oczoo E RATED CAPACITY 25008 i 80 PSI MAX OPERATING RESSURE E O U 074 E 12 LIFITRAVEL 4 Figure 9 Label 36405810 LIFTINGCAPACITYvs AIRPRESSURE I vwoczun RATED CAPACITY 5000 w 1 80 PSI MAX ERATING RESSURE amp E 2 O v 07d e gt e 12 RA EL INCEES Figure 10 Label 36405820 SPECIFICATIONS Capacity Base Under Max Shipping Max Frame Platform Lowered Raised clearance No Of Operating Weight Model Travel Lbs Size Sizes Height Height Pallet Jack Airbags Pressure pounds 24 25 1 24
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