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1. PRINT S SERIES AND K SERIES TABLE OF CONTENTS MAY 2014 SERVICE MANUAL MAINTENANCE II S K SERIES PUBLIC USE MAINTENANCE AND REPAIR egular maintenance of the RICON S Series and K Series Public Use wheelchair lift will help optimize its perfor mance and reduce the need for repairs This chapter contains cleaning and lubrication instructions mainte nance schedule troubleshooting section and maintenance diagrams SCS ATION CSCS This Ricon product is highly specialized Maintenance and repairs must be performed by a Ricon dealer or qualified service technician using Ricon replacement parts Modifying or failing to properly maintain this product will void warranty and may result in unsafe operating conditions caution A LUBRICATION Do not lubricate motor or other electrical components Lubrication of electrical components may create unintentional short circuits Lubrication should be performed at least every six months or sooner depending on usage Refer to Figure 3 1 and the following Maintenance Schedule Lubricate lift at points specified A TORSION SPRINGS BOTH SIDES KNUCKLE LINKS BOTH SIDES A TORSION SPRINGS BOTH SIDES DETAIL B A LUBRICATE WITH A PENETRATING OIL NOTE HANDRAILS AND PLATFORM A LUBRICATE WITH DRY LUBRICANT GRAPHITE MAY DIFFER FROM ILLUSTRATION RSM0005200 FIGURE 3 1 LIFT LUBRICATION POINTS B CLEANING Regular cleaning with mild soap i e dish soap car wash2. bridgeplate also known as inner rollstop or IRS cable as sembly Refer to Figure 3 3 on following page Please follow these instructions carefully Call Ricon Product Sup port if you need assistance a b Study the routing of the cable before removing it Deploy the lift platform to vehicle floor level Be certain that bridgeplate is resting against baseplate as sembly Remove pinch point shields from the left and right vertical arm assemblies Assemble and secure one end of an IRS cable to the IRS pulley mount block 1 located inside the left ver tical arm assembly using a hex screw bushing and washer Route the cable around the IRS pulley mount block bushing 2 Verify that cable is routed between the bushing tab and the point where the cable makes contact with the bushing Install washer and hex nut over bushing and cable assembly Continue to route the cable around grooved bearings 3 4 and 5 Route the cable down the length of the vertical arm assembly and around grooved bearing 6 Assemble and secure the end of the IRS cable to the left side of the bridgeplate 7 using a hex screw washer bushing and he nut Be sure to install a hex nut on the inside of the inner rollstop Repeat for right side Reinstall pinch point shields removed in step 2 Ricon _ _ KK 3z0skLO2A 1 A aber su sk wy MAY 2014 4 S SERIES AND K SERIES SERVICE MANUAL MAINTENANCE VERTICAL ARM _ ee PAM BoA
3. ASSEMBLY PINCH POINT AN SHIELD ED A I Z A O GROOVED BEARING IRS PULLEY MOUNT BLOCK IRS ACTUATOR CAM ASSEMBLY INNER ROLLSTOP RSMO001000 FIGURE 3 3 BRIDGEPLATE CABLE ROUTING S K SERIES LIMIT SWITCH STATES Refer to Figure 3 4 The limit switch actuation diagram shows the state of all limit switches as the platform travels from fully stowed to vehicle floor level and to ground level The solid line indicates the normally CLOSED por tion of switch is operational while the two thin lines indicate the normally OPEN portion of the switch is opera tional The dotted lines m m a are used to show switch states beyond normal travel boundaries of the platform This is useful to show the operation of switches that change state at folded or ground level positions For proper operation of lift the switch actuations must overlap as shown 32DSKL02 A 1 O P PA PN L LT L A F A A G TO TF TR F L F L FO OD OO OU RE RO RN M D MR M D SWITCH v V V DOWN DEPLOY enable LL UP STOW enable GG 20 STOW door close enable nai 50 Ib limit switch 50 Ib limit switch actuates when weight on platform exceeds 50 Ibs during IN platform motion RSM0005400 FIGURE 3 4 LIMIT SWITCH ACTUATION CHART Ricon 3 5 A Maires subsitiay S SERIES AND K SERIES MAINTENANCE P JT O SERVICE MANUAL O MAY 2014 5 BRIDGEPLATE ADJUSTMENT NOTE The p
4. F ELECTRICAL WIRING DIAGRAM 1 DIAGRAM LEGEND a Wire Color Codes TABLE 3 3 WIRE COLOR CODES Dm B FD mea ur we END OF TABLE b Electrical Connector Description Refer to Figure 3 6 The standard electrical connectors used by Ricon are Molex 062 Series These con nectors have terminal numbers molded onto the back Use these numbers and colors to identify all wires K O O O O lt PLUG RECEPTACLE P R RSM0005600 FIGURE 3 21 MOLEX CONNECTORS C Diagram Labels TABLE 3 4 DIAGRAM LABELS Diagram Label Command Description Circuit current rating is also given DO Door Open Direct Command _ FAST Signalto speedup valve for UP and DOWN Penn Grong END OF TABLE 3 12 F m Ricon _ _ i ou n gt v gt szpskLozA 1 abtoo su sk wy S SERIES AND K SERIES MAY 2014 SERVICE MANUAL EE MAINTENANCE d Electrical Symbols Figure 3 22 shows standard symbols used in the electrical wiring diagram CIRCUIT BREAKER CONTACTOR fld cutoff dc enable q a SPDT LIMIT SWITCH DIODE GROUND SWITCH WIRE CROSSINGS CONTACTS O COMMON NORMALLY CLOSED NOT O NORMALLY CONNECTED CONNECTED OPEN RSM0005700 FIGURE 3 22 DIAGRAM SYMBOLS e WIRING DIAGRAM Refer to Figures 3 23 on the following page for the S K Series Public Use wiring diagram B2DSKLO2 A 1 m Ri eem m gt gt Qo b s O Q 3 13 A
5. G LIFT OPERATION SYMPTOM POSSIBLE CAUSE REMEDY Hydraulic fluid leaks Loose hydraulic fitting Make sure fitting is PROPERLY tightened Hydraulic component Discontinue use of lift Have repairs made by a Ricon defective dealer or qualified service technician Rollstop does not open Obstruction of rollstop Raise lift and remove obstruction release latch Abnormal Obstruction in lifting frame Remove obstruction and check for any damage functions Operation Backup pump manual release Turn manual release valve CLOCKWISE until slightly snug valve OPEN Hydraulic fluid may be low While platform is at GROUND LEVEL be certain that pump hydraulic fluid level is maintained at required FULL level Add only Texaco 01554 Aircraft Hydraulic Oil or equivalent U S mil spec H5606G fluid Air may be trapped in Purge hydraulic system by operating lift through its maxi hydraulic system mum range of travel for at least four complete cycles For vehicles that do not use full travel of lift the maximum range of travel is accomplished by raising vehicle on a service hoist or ramp No Operation Control system circuit breaker Reset circuit breaker tripped Backup pump manual release Turn manual release valve CLOCKWISE until slightly snug valve OPEN Hydraulic hose or fitting leak Contact a Ricon dealer or qualified service technician for re pair Hydraulic fluid may be low While platform is at GROUND LEVEL be certain that pump hyd
6. Maires subsitiay S SERIES AND K SERIES MAY 2014 LIOA ol YALNNOD 318VN3 AOld 1C 114VN3 NMOG 119VN3 MOIS 114VN3 dN 008G000NSY HOLI MS 3A7 VA JAT VA JLlV1Id390IH HOLIMS 9019 01S J HN SSJHd 1138 vue ES inv sa 14 qQION310S H901 MOLS sinon TIVHOGNYH os lt lt 90 QO 29 2 2 x So 22 c A gt O U qaq N M M M a314 03H id oza 814 Bi g lzd 8a Zd E ve WE lt 7 177 er er gt lt IN 4Std led bin LU bd 316 DIN d G3H JOIAHSS LON OG r quvog W LIN 2419 er Ed 9 N 0OLd Ly O INY QN 3d z ui OHLNOJ S LHSI1 034 SHOLOVLINOO dW1 d 1400N JAG JOVAYAILNI ATOIHAA NH9 114 g ddd OIA Z NEXT CHAPTER FIGURE 3 23 S K SERIES DOT PUBLIC USE WIRING DIAGRAM A nicon abtoo su sk wy BACK TO TOP 3 14 32DSKL02 A 1
7. block flush with the blade of the platform latch release weldment Tighten the screws until the base latch block is secured in place g Close the manual release valve the press the STOW function to remove the load from the lift h Partially deploy the lift Ensure that the platform deploys with no delay Stow the lift and verify that there is a positive lock when the lift is stowed B2DSKLO2 A 1 me Ricon lt cccc _ 3 7 AWabtes Subsirtisry S SERIES AND K SERIES MAINTENANCE LLL SERVICE MANUAL T MAY 2014 7 REAR SPRING REPLACEMENT NOTE A well maintained and lubricated parallel arm spring will prolong the life of the spring In the event that the spring will need to be replaced proceed with rear spring replacement a Deploy platform to ground level onto a pallet for support and to maintain the parallel arms at a 90 degree angle perpendicular to the rear of the platform towers The tine of the spring will load straight up and down when done so b Use a 3 16 allen wrench to remove screw and lock washer from the pin c Refer to Figures 3 13 and 3 14 Attach pin alignment tool to pin Replace pin with appropriate tool to hold parallel arm and rear spring in place FIGURE 3 13 PIN WITH PIN ALIGNMENT TOOL FIGURE 3 14 PIN WITH PIN ALIGNMENT TOOL d Refer to Figure 3 15 Carefully remove tool holding parallel arm and rear spring in place Hold rear spring and parallel arm then pull pa
8. cap screw with 5 32 hex wrench f Refer to Figure 3 18 Drive rear pin out and retain Use pin driver pin is driven towards bushing side M d w z a A M pu ss J W A FIGURE 3 18 PLATFORM FOLDING BRACKET g Drive front pin out and retain NOTE Hydraulic cylinder may be left in baseplate U tower for this and proceeding operations i Refer to Figure 3 19 Unscrew gland nut j Refer to Figure 3 19 Pull shaft out k Refer to Figure 3 19 Remove old piston using appropriate tool Heat piston thread if required to soften the thread lock and remove piston 32DSKLO2 A 1 m Ricon 3 9 S SERIES AND K SERIES MAINTENANCE s SERVICE MANUAL s_ lt NAY 2014 HYDRAULIC CYLINDER TUBE PISTONASSY GLAND NUT ASSY SHAFT RSM0007100 FIGURE 3 19 HYDRAULIC CYLINDER Refer to Figure 3 19 Replace gland nut with the gland nut supplied in kit Apply thin film of hydraulic fluid to the seals before installing m Thoroughly clean shaft and new piston threads NOTE If shaft threads were damaged by the thread locking punch rethread with 1 2 20 die Use a wire brush to remove all thread sealer from shaft threads Blow clean Always blow piston threads clean even if no dirt is visible n Refer to Figure 3 19 Install new piston supplied in kit Apply medium strength thread lock blue on shaft threads and tight
9. ect electrical wiring for frayed wires loose connectors etc Place vehicle in non interlock mode and verify that lift does not operate Verify that lift decals are properly affixed clearly visible and legible Replace if necessary Verify that armrest fasteners are properly tightened Verify that vehicle mounting and support points are undamaged Verify that mounting bolts are sufficiently tight and free of corrosion Verify that link pins on arms are properly installed free from damage and locked in position 3 p 3 3 Verify that platform moves freely without binding and does not wobble Verify that bridgeplate operates without binding during lift functions Verify that bridgeplate deploys fully when platform stops at floor level Verify bridgeplate rests flat against baseplate Verify that rollstop is opened completely when platform is at ground level Verify that rollstop closes and locks when platform leaves ground A CAUTION 1800 CYCLES Check and add fluid when platform is at ground level Fluid that is added when platform is raised will overflow when platform is lowered Verify that pump hydraulic fluid level is at FULL mark when platform is at ground level Add Texaco 01554 Aircraft Hydraulic Oil or equivalent U S mil spec H5606G fluid Verify there are no hydraulic fluid leaks Verify that manual backup pump operates properly Clean lift with mild soap and water and wipe dry Prevent rust by coa
10. en securely o Refer to Figure 3 19 Reinsert shaft into cylinder Apply thin film of hydraulic fluid to seals before installing Use split cup tool to insert piston NOTE Be extra careful not to damage piston seals p Firmly tighten gland nut Apply medium strength thread lock blue on gland nut threads q Install front pin Place set screw face down Apply medium strength thread lock blue on cap screw Tighten using 5 32 hex wrench r Install rear spring using spring installation tools s Install rear pin Insert pin from bushing side Apply medium strength thread lock blue to button head screw Tighten using 3 16 hex wrench 3 10 A Rigeem lt 3z0skLO2A 1 A ares su sk wry S SERIES AND K SERIES MAY 2014 SERVICE MANUAL MAINTENANCE E HYDRAULIC CIRCUIT DIAGRAM HYDRAULIC HYDRAULIC CYLINDER CYLINDER LEFT RIGHT FLOW CONTROL FLOW CONTROL VALVE LEFT VALVE RIGHT LOCATED AT LOCATED AT HYDRAULIC CYLINDER HYDRAULIC CYLINDER ro PRESSURE ar SWITCH I 5 1 7 DECELERATION SPOOL CONTROL VALVE gea x OPTIONAL a ey ee 21 MANUAL BACK UP PUMP PRESSURE RELIEF ____ VALVE RELEASE VALVE Bed POPPET __ EEG 9 MOTOR GEAR l PUMP RSM0005500 FIGURE 3 20 S K SERIES HYDRAULIC CIRCUIT 32DSKLO2 A 1 3 11 EA S SERIES AND K SERIES MAINTENANCE O S SERVICE MANUAL P NAY 2014
11. et head is visible slowly turn the UP CUTOFF ADJUSTMENT SCREW counterclockwise to adjust the bridgeplate backward or clockwise to adjust the bridgeplate forward h Cycle platform to DEPLOY then UP to floor level Observe the position of the bridgeplate to the load sensor and make any necessary adjustments The bridgeplate should sit on the load sensor as shown in Figure 3 7 6 STOW LOCK ADJUSTMENT NOTE The purpose of this procedure is to replace and properly set the stow lock a Fully STOW platform b Refer to Figures 3 11 and 3 12 Use a 3 16 allen wrench to remove the two screws and washers that at tach the base latch block to the bridgeplate Partially deploy platform then remove base latch block for re placement BASE LATCH BLOCK LATCH RELEASE WELDMENT FIGURE 3 11 PUSH AND HOLD UP FIGURE 3 12 BASE LATCH BLOCK c Place sharp edge of the base latch block against the blade of the platform latch release weldment in the baseplate as shown in Figure 3 12 d Stow the platform e Add medium strength thread lock to the screws then install the two screws and washers Turn the screws out one turn so that the screws are not completely tightened NOTE This is done to ensure the sharp edge of the base latch block contacts the blade of the platform latch release weldment in the baseplate before tightening f Slowly open the manual release valve to apply load to the lift The weight of the lift will pull the base latch
12. liquid and drying thoroughly will protect lift painted surfaces Cleaning is especially important in areas where roads are salted in winter Make sure that lift pivot points remain clear and clean prior to lubrication 32D SKL 02 A 1 no Rieem O D oo v ooc gt Q 3 1 A Maires subsitiay C MAINTENANCE MAINTENANCE SCHEDULE SERVICE MANUAL S SERIES AND K SERIES MAY 2014 Under normal operating conditions maintenance inspections are required at least every six months 1750 cycles and a thorough inspection should be performed at service intervals referenced in Table 3 1 Service should be increased un der conditions of heavier use more than 10 cycles per day TABLE 3 1 MAINTENANCE SCHEDULE ACTION TO PERFORM SERVICE POINT Overall condition Control pendant Threshold warning system Bridgeplate load sen sor Electrical wiring Vehicle interlock Decals Armrests Lift mounting points Main lifting pivots Platform pivot points Bridgeplate Front rollstop Hydraulic power unit Cleaning and lubrication 10 CYCLES Listen for abnormal noises as lift operates i e grinding or binding noises Verify that control pendant is undamaged and cable connector is tight Verify that system properly detects objects in threshold area and actuates the audible alarm Verify that sensor inhibits downward movement of platform when a weight is present on lowered bridgeplate 150 CYCLES Insp
13. rallel arm up and remove rear spring PULL UP like NE O a FIGURE 3 15 PIN WITH PIN ALIGNMENT TOOL e Replace and install rear spring f Refer to Figures 3 16 Install a 2 extension pin through parallel arm and rear spring FIGURE 3 16 2 INCH EXTENSION FIGURE 3 17 PLACE REAR SPRING g Refer to Figure 3 17 Use appropriate tool to use as leverage to pull back tine of bent rear spring and place into baseplate tower 3 8 r Rigeem lt 3z0skLO2A 1 A Mbien suamiku y S SERIES AND K SERIES MAY 2048 SERVICE MANUAL lt lt MAINTENANCE h Replace 2 Inch extension with existing pin I Reinstall screw and lock washer j Repeat removal and installation for opposite parallel arm 8 HYDRAULIC CYLINDER GLAND NUT AND PISTON REPLACEMENT a Lower lift to ground level NOTE Lift must be lowered as far as possible to avoid personal injury and oil spillage when hydraulic components are dismantled b Fully open manual release valve NOTE Important for allowing easy removal insertion of ram into cylinder c Install hydraulic breather tube if available NOTE The hydraulic breather tube may help in avoiding oil overflow from filler neck when reinstalling ram An as sistant may be required to check oil level in filler neck as ram is reinserted if breather tube is not available d Loosen both hydraulic button head screws with 3 16 hex wrench to loosen pin Remove and retain
14. raulic fluid level is maintained at required FULL level Add only Texaco 01554 Aircraft Hydraulic Oil or equivalent U S mil spec H5606G fluid Air can be trapped in Purge hydraulic system by operating lift through its maxi hydraulic system mum range of travel for at least four complete cycles For vehicles that do not use full travel of lift the maximum range of travel is accomplished by raising vehicle on a service hoist or ramp END OF TABLE 32DSKLO2 A fireon n gt gt gt gt gt gt gt gt gt gt gt gt gt 3 3 A Maires subsitiary S SERIES AND K SERIES MAINTENANCE SERVICE MANUAL AY 2014 2 PUMP SOLENOID LED STATUS INDICATOR Refer to Figure 3 2 Two identical solenoids provide a margin of safety in the event that one of the solenoids fails with its contacts closed A two color status indicator LED is located between the 8A and 30A circuit breakers to monitor the condition of the two solenoids The LED is normally off when the pump is not operating and becomes green when the pump operates When the pump is not operating and the left solenoid has failed the LED will be red The LED will be green when the right solenoid has failed 3 8 AMP CIRCUIT BREAKER LED STATUS INDICATOR 30 AMP CIRCUIT BREAKER FE RSM0005300 FIGURE 3 2 STATUS INDICATORS FOR PUMP SOLENOIDS BRIDGEPLATE CABLE ASSEMBLY REPLACEMENT The following steps provide instructions for replacing the
15. ting all surfaces with a light weight oil Remove excess oil Spray penetrating oil Curtisol Red Grease 88167 or WD 40 where specified follow ing directions on container Remove excess grease from surrounding areas A CAUTION A Ricon dealer or qualified service technicican must perform the following safety check Hydraulic cylinder hoses and fittings 3600 CYCLES Check hydraulic cylinder for evidence of leaks Inspect hydraulic hoses for damage Verify that all fittings are tight END OF TABLE 32DSKL02 A 1 S SERIES AND K SERIES MAY 2014 SERVICE MANUAL EE MAINTENANCE D TROUBLESHOOTING The troubleshooting guides are designed to provide logical starting points to locate general problems that could occur with lift However not all possible problems or combinations of problems are listed For troubleshooting lift refer to Tables 3 2 The guide do not incorporate routine safety precautions or preliminary procedures and assume that vehicle battery is fully charged and battery terminals connectors are clean and tight THE TROUBLESHOOTING GUIDES DO NOT INCORPORATE ROUTINE SAFETY PRECAUTIONS OR PRELIMINARY PROCEDURES DURING THE RICON WARRANTY PERIOD A TRAINED RICON DEALER OR QUALFIED SERVICE TECHNICIAN MUST PERFORM TROUBLESHOOTING AFTER THE WARRANTY PERIOD IT IS RECOMMENDED THAT TROUBLESHOOTING BE CONTINUED BY A RICON DEALER OR QUALIFIED SERVICE TECHNICIAN 1 LIFT TROUBLESHOOTING TABLE 3 2 TROUBLESHOOTIN
16. urpose of the bridgeplate adjustment is to adjust the floor level setting by adjusting the Up Cutoff Adjustment Screw and Deploy Cutoff Adjustment Screw so that the bridgeplate properly sits onto the load sensor a Fully STOW platform b Refer to Figure 3 5 and 3 6 Insert the screwdriver into the DEPLOY CUTOFF ADJUSTMENT SCREW bottom adjusting screw then deploy the platform to floor level Push and hold control pendant DEPLOY switch FIGURE 3 5 BOTTOM ADJUSTING SCREW FIGURE 3 6 PUSH AND HOLD DEPLOY c Slowly turn DEPLOY CUTOFF ADJUSTMENT SCREW clockwise until the bridgeplate moves onto the load sensor as shown in Figure 3 7 FIGURE 3 7 BRIDGEPLATE ADJUSTED CORRECTLY d DEPLOY platform about 10 inches from ground e Refer to Figure 3 8 Insert the screwdriver into the UP CUTOFF ADJUSTMENT SCREW top adjusting screw then push and hold control pendant UP switch to cycle the platform back up to floor level FIGURE 3 8 PUSH AND HOLD UP 3 6 S Rigeem lt 3z0skLO2A 1 A abtoo subst wy S SERIES AND K SERIES MAY 2014 w SERVICE MANUAL MAINTENANCE f Refer to Figure 3 9 and 3 10 When the platform is at floor level observe where the bridgeplate sits on the load sensor ADJUST BRIDGEPLATE FIGURE 3 9 ADJUSTMENT REQUIRED FIGURE 3 10 ADJUSTMENT REQUIRED g Refer to Figure 3 9 and 3 10 If the bridgeplate sits over the load sensor where it is not visible or if the riv
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