Oshkosh Corporation JLG 1930ES, Service Maintenance Manual

Page 1: ...Service Maintenance Manual Models 1930ES 2032ES 2632ES 2646ES 3246ES PVC 1910 31215074 January 8 2020 Rev A AS NZS G o t o D i s c o u n t E q u i p m e n t c o m t o o r d e r y o u r p a r t s...

Page 2: ...ith a quote for the right part that your machine needs We sell worldwide for the brands Genie Terex JLG MultiQuip Mikasa Essick Whiteman Mayco Toro Stone Diamond Products Generac Magnum Airman Haulott...

Page 3: ...machines hydraulic systems operate at extremely high potentially dangerous pres sures Every effort should be made to relieve any system pressure prior to disconnecting or removing any por tion of the...

Page 4: ...INTRODUCTION MAINTENANCE SAFETY PRECAUTIONS A 2 31215074 REVISIONLOG Original Issue A January 8 2020 G o t o D i s c o u n t E q u i p m e n t c o m t o o r d e r y o u r p a r t s...

Page 5: ...l Stability Weights 1 10 1 8 Thread Locking Compound 1 11 1 9 Torque Charts 1 12 SAE Fastener Torque Chart 1 12 SAE Fastener Torque Chart Continued 1 13 SAE Fastener Torque Chart Continued 1 14 SAE Fa...

Page 6: ...ection Schedule 2 6 Footnotes 2 7 SECTION 3 CHASSIS SCISSOR ARMS 3 1 Traction System 3 1 Theory of Operation 3 1 3 2 Pump Motor Theory of Operation 3 2 Pump Motor Electrical Evaluation 3 2 3 3 Drive M...

Page 7: ...x Disassembly 3 41 Tilt Sensor Replacement 3 42 3 14 Scissor Arms and Platform Positioning and Support 3 43 3 15 Platform Removal 3 44 3 16 Scissor Arms Removal 3 44 3 17 Platform Control Station 3 50...

Page 8: ...ensor Calibration 5 8 5 7 Updating Software 5 8 5 8 Troubleshooting 5 9 5 9 Machine Model Adjustment 5 26 5 10 Machine Configuration Programming Information 5 27 SECTION 6 DIAGNOSTIC TROUBLE CODES 6 1...

Page 9: ...Faston 7 6 AMP Micro Fit 7 6 AMP Mini Fit Jr 7 6 Mini Fit Sr 7 7 DIN Connectors 7 7 Exceptions 7 7 7 5 AMP Connector 7 8 Assembly 7 9 Disassembly 7 11 Wedge Lock 7 11 Service Voltage Reading 7 12 7 6...

Page 10: ...rter 3 37 3 26 Limit Switch Locations 3 39 3 27 Pothole Switch Adjustment 3 40 3 28 Tilt Sensor Location 3 42 3 29 Tilt Sensor Removal 3 43 3 30 Arms and Platform Positioning and Support 3 45 3 31 Sci...

Page 11: ...ation 7 12 7 12 DT DTP Contact Installation 7 13 7 13 DT DTP Contact Removal 7 13 7 14 HD HDP Contact Installation 7 13 7 15 HD HDP Locking Contacts Into Position 7 14 7 16 HD HDP Contact Removal 7 14...

Page 12: ...tenance and Safety Inspection 2 7 3 1 ZAPI Power Module Specs 3 26 3 2 Diagnostic Trouble Codes Delta Q Battery Charger 3 33 3 3 Fault Codes Green Power 3 34 3 4 Fault Codes Eagle Battery Charger 3 35...

Page 13: ...ith a quote for the right part that your machine needs We sell worldwide for the brands Genie Terex JLG MultiQuip Mikasa Essick Whiteman Mayco Toro Stone Diamond Products Generac Magnum Airman Haulott...

Page 14: ...or AUS OutdoorZoneA AUS OutdoorZoneB 100lbforce 445N N A N A N A N A 90lbforce 400N 45lbforce 200N 90lbforce 400N N A N A 45lbforce 200N N A N A 120lbforce 533N N A N A N A N A 90lbforce 400N 45lbforc...

Page 15: ...1 2632ES singlecap 500lb 227kg 2 230kg 2 N A N A 230kg 2 N A N A 2632ES dualcapto20ft 800lb 363kg 2 360kg 2 N A N A 360kg 2 N A N A 2632ES dualcapto26ft 500lb 227kg 2 230kg 2 N A N A 230kg 2 N A N A...

Page 16: ...bly All Models Type Series Wound Permanent Magnet 24V DC Power 3kW Battery Charger AC Inverter Description 1930ES 2032ES 2632ES 2646ES 3246ES Size 323mmx 100mm 406 mm x125 mm MaxTireLoad 2500lb 1134kg...

Page 17: ...Charger Specifications DESCRIPTION Delta Q 1001253952 Table 1 2 Battery Charger Specifications DESCRIPTION Eagle Performance 1001177842 OUTPUT NominalDCOutputVoltage 24V MaximumDCOutputVoltage 31 92V...

Page 18: ...0VAC InputFrequency 54to66Hz OPERATION ChargingIndicator YellowLED 100 ChargeIndicator GreenLED FaultIndicator RedLED PROTECTION OutputReverseDCPolarity 125AReplaceableFuse OutputACShortCircuit Intern...

Page 19: ...achineHeight RailsUp 6 5ft 2m 7 2ft 2 2m 7 5ft 2 3m 7 9ft 2 4m 7 9ft 2 4m OverallStowedMachineHeight RailsFolded 5 6ft 1 6m 6ft 1 8m 6 2ft 1 9m 6 6ft 2m 6 6ft 2m RailHeight Fromplatformfloor 3 6ft 1 1...

Page 20: ...L 3 and sufficient chemical stability for mobile hydraulic system ser vice JLG Industries recommends DTE 11M hydraulic oil NOTE Aside from JLG recommendations it is not advisable to mix oils of differ...

Page 21: ...e 32 Density 59 F 15 C 0 869kg l 0 936kg l PourPoint Max 38 F 39 C 27 F 33 C FlashPoint Min 514 F 268 C 540 F 282 C OperatingTemperature 20 to 200 F 29to 93 C 1 4to200 F 17to93 C Viscosity Specificati...

Page 22: ...tolerance of 6 in 0 15 m Table 1 12 Tilt Setting Model Tilt Setting fronttoback Tilt Setting side to side Maximum Platform Elevation 1930ES 3 1 5 2 2 5 3 18 75ft 5 7m 14ft 4 3m 11ft 3 4m 9ft 2 7m 2032...

Page 23: ...6cm 6 1in 15 6cm 6 1in 15 6cm Component 1930ES 2032ES 2632ES 2646ES 3246ES Platform 100lb 45kg 133lb 61kg 176lb 80kg ManualPlatformExtension 45lb 20kg ArmAssembly IncludesLiftCylinder 620lb 281kg 939l...

Page 24: ...substituted in place of Vibra TITE 121 JLGPN Loctite NDIndustries Description 0100011 242 Vibra TITE 121 MediumStrength Blue 1001095650 243 Vibra TITE 122 MediumStrength Blue 0100019 271 Vibra TITE 14...

Page 25: ...0 1599 10700 90 122 65 88 100 136 80 108 9 16 12 0 5625 0 1820 11600 110 149 80 108 120 163 98 133 18 0 5625 0 2030 12950 120 163 90 122 135 184 109 148 5 8 11 0 6250 0 2260 14400 150 203 110 149 165...

Page 26: ...0 120 165 110 150 90 120 9 16 12 0 5625 0 1820 16400 155 210 140 190 115 155 18 0 5625 0 2030 18250 170 230 155 210 130 175 5 8 11 0 6250 0 2260 20350 210 285 190 260 160 220 18 0 6250 0 2560 23000 24...

Page 27: ...5 75 20 0 5000 0 1599 10700 75 100 71 97 65 88 9 16 12 0 5625 0 1820 11600 90 120 87 118 80 109 18 0 5625 0 2030 12950 105 145 97 132 90 122 5 8 11 0 6250 0 2260 14400 130 175 120 163 115 156 18 0 625...

Page 28: ...00 135 95 130 90 120 9 16 12 0 5625 0 1820 16400 130 175 125 170 115 155 18 0 5625 0 2030 18250 145 195 135 185 130 175 5 8 11 0 6250 0 2260 20350 180 245 170 230 160 220 18 0 6250 0 2560 23000 205 28...

Page 29: ...8250 145 195 135 185 130 175 5 8 11 0 6250 0 2260 20350 180 245 170 230 160 220 18 0 6250 0 2560 23000 205 280 190 260 180 245 3 4 10 0 7500 0 3340 30100 320 435 300 415 280 380 16 0 7500 0 3730 33600...

Page 30: ...030 18250 145 195 135 185 130 175 5 8 11 0 6250 0 2260 20350 180 245 170 230 160 220 18 0 6250 0 2560 23000 205 280 190 260 180 245 3 4 10 0 7500 0 3340 30100 320 435 300 415 280 380 16 0 7500 0 3730...

Page 31: ...2 50 38 45 55 12 1 75 84 30 36 7 88 66 79 97 14 2 115 50 0 140 105 126 154 16 2 157 68 3 219 164 197 241 18 2 5 192 83 5 301 226 271 331 20 2 5 245 106 5 426 320 383 469 22 2 5 303 132 0 581 436 523 6...

Page 32: ...58 00 36 1 70 65 55 12 1 75 84 30 52 5 125 115 95 14 2 115 71 6 200 180 150 16 2 157 97 8 315 280 235 18 2 5 192 119 5 430 385 325 20 2 5 245 152 5 610 550 460 22 2 5 303 189 0 830 750 625 24 3 353 22...

Page 33: ...20 19 10 1 5 58 00 25 2 43 40 38 12 1 75 84 30 36 7 75 70 66 14 2 115 50 0 119 110 105 16 2 157 68 3 186 175 165 18 2 5 192 83 5 256 240 225 20 2 5 245 106 5 362 340 320 22 2 5 303 132 0 494 465 435 2...

Page 34: ...1 5 58 00 36 1 61 58 55 12 1 75 84 30 52 5 105 100 95 14 2 115 71 6 170 160 150 16 2 157 97 8 265 250 235 18 2 5 192 119 5 365 345 325 20 2 5 245 152 5 520 490 460 22 2 5 303 189 0 705 665 625 24 3 3...

Page 35: ...ction shall be accomplished for each machine in service for 3 months or 150 hours which ever comes first out of service for a period of more than 3 months or when purchased used The frequency of this...

Page 36: ...sed Components Removal andInstallation 1 Use adjustable lifting devices whenever possible if mechanical assistance is required All slings chains cables etc should be parallel to each other and as near...

Page 37: ...l Always use new replace ment hardware when installing locking fasteners 2 Use bolts of proper length A bolt which is too long will bottom before the head is tight against its related part If a bolt i...

Page 38: ...system with oil temperatures below 15 F 26 C is not recommended If it is nec essary to start the system in a sub zero environment it will be necessary to heat the oil with a low density electrical hea...

Page 39: ...if any of the following is observed a Frayed or separated fibers on the liner surface b Cracked or damaged liner backing c Bearings that have moved or spun in their housing d Debris embedded in liner...

Page 40: ...cation and use of the machine NOTICE JLG INDUSTRIES REQUIRES THAT A COMPLETE ANNUAL INSPEC TION BE PERFORMED IN ACCORDANCE WITH THE ANNUAL MACHINE INSPECTION REPORT FORM NOTE This machine requires per...

Page 41: ...1 4 LanyardAnchoragePoint 1 4 16 1 4 16 CHASSIS Battery 3 5 3 5 HydraulicPump 1 5 1 5 Valves 1 5 1 5 HydraulicFilter 26 26 HydraulicHosesandTubing 1 5 1 5 HydraulicOilTank 3 4 5 3 4 5 LiftCylinder 1 4...

Page 42: ...ith a quote for the right part that your machine needs We sell worldwide for the brands Genie Terex JLG MultiQuip Mikasa Essick Whiteman Mayco Toro Stone Diamond Products Generac Magnum Airman Haulott...

Page 43: ...l speeds and better electrical efficiency The Field Windings also provide direction reversal for traction When driving forward MOSFET switches 1 and 4 turn On to apply positive potential to F2 and gro...

Page 44: ...ed on the Pump Motor Failure of one of these evaluations is signif icant and may indicate that the device is physically dam aged Refer to Figure 7 2 Resistance Measurement Make all measurements with a...

Page 45: ...inder assembly 3 Open Circuit Pump Motor This issue will allow the vehicle to drive but Lift Up and Steer Functionality will be lost and the Pump Motor will not operate Under DIAGNOSTICS PUMP the JLG...

Page 46: ...disconnecting the drive motor cable from the motor and re measure resistance isolation Common Traction System Difficulties 1 Short Circuit Motor Armature This issue will allow the vehicle to drive ve...

Page 47: ...dule during this analysis Wait 60 seconds after power is disconnected to allow internal charge to dissipate risk of hazard improper readings otherwise Resistance 100kOhms all Terminals to Housing Ensu...

Page 48: ...roll with more difficulty than others Do not be concerned if the gears in your unit seem to roll hard as long as they roll with consistency Leak Test The purpose of a leak test is to make sure the uni...

Page 49: ...on opposite wheel drive With both drive motor brakes now disengaged the machine can be moved manually 7 After towing is complete chock wheels and remove Cover Bolts from Disengage Holes 8 Reinstall Br...

Page 50: ...om the power con trol module 2 Drain the oil out of the unit by removing the cover plug Note the condition of the oil replace if nec essary 3 Remove the two motor mounting bolts and wash ers 4 Gently...

Page 51: ...1 5 inches of thread length into each of the three tapped holes to force the ring gear out Be sure and alternate between the jacking screws to keep the ring gear from becoming mis aligned in the bore...

Page 52: ...washer from each planet gear 7 Remove retaining ring from output sun gear 8 Slide output sun gear out from the center of the input carrier 9 Remove the three planet shafts from the input car rier NOTE...

Page 53: ...g Apply force to the push the bearing out This bearing will need to be replaced upon reas sembly 2 Remove main lip seal NOTE This lip seal is also held in with a press fit Remove the lip seal only if...

Page 54: ...ng 5 Remove the shaft ball bearing from the center bore 6 Press out the motor shaft seal from the center bore 7 Remove the main bearing from the outside diame ter of the spindle NOTE This bearing is h...

Page 55: ...e 7 Place tanged thrust washer into each planet win dow of the spindle Make sure the tang sits in the cast groove on the inside of the window 8 Place a thrust washer onto the plane gear Line up the bo...

Page 56: ...b NOTE Theseal has a thin outer shell that can beeasily dam aged if not installed with care It is a good idea to start the seal into the bore with a rubber mallet before pressing 3 Flip the hub over 4...

Page 57: ...et gear Line up the bores as well as you can visually Additional grease may help hold every thing together 6 Place the input planet gear and thrust washers onto the input planet shaft sticking out fro...

Page 58: ...eel it go into mesh with the hub gear teeth apply slight downward pres sure to the hub and then find the next gear that is tight and do the same c Stage 3 Once all the planet gears are in mesh apply p...

Page 59: ...roove of the hub NOTE It may be helpful to stretch the o ring out prior to assembly to avoid pinching or shearing when the cover is assembled 10 Apply a heavy coating of grease to the cover thrust was...

Page 60: ...the sun gear splines with the motor shaft splines 2 Install the two motor mounting bolts and washers Torque to 9 11 ft lbs 12 15 Nm 3 Connect the end of the Motor Cable to the Power Module 4 Fill the...

Page 61: ...not torque bolt A until snug 2 Go to the opposite side of the bolt circle and tighten bolt B until equally snug 3 Crisscross around the bolt circle and tighten remaining bolts 4 Now use a torque wren...

Page 62: ...amp and hardware 4 Place the Green Clamp on the clamping rings as shown below 5 Bolt the clamp onto the underside of the frame a The Spacer goes between the frame and the Clamp b Place the Larger Wash...

Page 63: ...kside of the frame using the the back hole drilled in step 4 The roll pins inserted in the front most holes act as a stop to prevent the clamp from turning NOTE When bolting the green clamp onto the f...

Page 64: ...inal Assembly 6 Brush Box Assembly 7 Retaining Ring 8 Bearing 9 Commutator End Head 10 Grommet 11 Brake Assembly 12 Gasket Seal Kit 13 Cover Plate Kit 14 Cover Plate Mounting Screws 15 Brake Cover Mou...

Page 65: ...brake connector yellow and brown wires Measure the brake resistance and verify that it is between 18 and 22 Ohms Drive Motor Disassembly NOTE Refer to Figure 3 15 1 Remove the two Cover Plate Mounting...

Page 66: ...r and the shaft Visually inspect the commutator for excessive wear and overheating Replace as necessary 6 Visually inspect the brake surfaces for excessive wear Replace Brake Assembly 11 if necessary...

Page 67: ...securing the armature ter minals to the terminal studs Crimp the field con nection red orange to orange and blue to blue together and heat shrink Motor terminals must be assembled as shown in Always...

Page 68: ...re that the terminals are oriented as shown in Figure 3 18 6 After installing the new power module begin con necting the wire connectors cables to the module 7 Torque all terminal bolts to torque spec...

Page 69: ...ndicate module health status The LED shall be illuminated when the device is powered on The LED blinks 2Hz when an internal issue is detected that cannot be repaired by a technician It should be noted...

Page 70: ...out will allow for maximum extension 2 Locate the Diagnostic Port 1 and Brake Release Plugs 2 3 Apply di electric grease to the two Brake Release Plugs Connect the Brake Release Plugs to the Brake Rel...

Page 71: ...her Error will display on the LCD If a fault exists the trouble code will display on the LCD Refer to Sec tion 6 6 Using zip ties tie back cables and wires to prevent damage to the cables and wires Re...

Page 72: ...VED BATTERIES BEFORE BATTERY REMOVAL CAN BEGIN ENSURE THAT THE BATTERIES HAVE BEEN PROPERLY DISCONNECTED TO AVOID SERIOUS INJURY OR POSSIBLE DEATH 1 Pull the battery door completely out and discon nec...

Page 73: ...DIFFERENT WEIGHT OR SPECIFICA TION DO NOT MODIFY UNIT IN ANY WAY TO AFFECT STABILITY Check the electrolyte level of the batteries often adding only distilled water when required When fully charged bat...

Page 74: ...MOD IFY PLUG DO NOT TOUCH UNINSULATED PORTION OF OUTPUT CONNECTOR OR UNINSULATED BATTERY TERMINAL DISCON NECT THE AC SUPPLY BEFORE MAKING OR BREAKING THE CON NECTIONS TO THE BATTERY WHILE CHARGING DO...

Page 75: ...eckDCconnections Disconnectparasiticloads This errorwillautomaticallyclearoncethechargerisresetbycyclingDCorAC E 0 0 8 Batterytemperatureisoutofrange Possiblebatterytemperaturesensorerror Checktempera...

Page 76: ...o functionproperly Pleaseplacethechargerintoanareawithambi entairflowortoacoolerplace 2 Disconnectthechargerandwaitfor15 20minsbeforereconect ingforcharging 4 BatteryHighTemperatureProtection 1 Charge...

Page 77: ...eperiod Thisindicatesthatapossible batteryproblemexistsandthatthechargecyclehasbeenterminatedat thispoint 30 90 REDLEDS BLINKING INTERNALOVERTEMPSHUTDOWN Thisindicationoccursifthechargercircuitryhasde...

Page 78: ...current Algorithm is indicated on the Yellow Charging LED A single digit Algorithm is indicated by the number of blinks separated by a pause A two digit Algorithm is indicated by the number of blinks...

Page 79: ...k charger interlock connector 2 position socket 1 If voltage is present there replace the Inverter Charger data interface harness If Vbatt is not present at the 2 position connector socket 1 check the...

Page 80: ...6 Inverter Charger connector 8 position pin 6 should have continuity to Interlock connector pin 2 and then to ground module socket J1 29 Ground Module powered while key is off or similar behavior This...

Page 81: ...31215074 3 39 3 12 LIMITSWITCH LOCATIONS Figure 3 26 Limit Switch Locations 1 Pothole Switch Typical on opposite side of machine 2 Rotary Angle Switch G o t o D i s c o u n t E q u i p m e n t c o m t...

Page 82: ...Repeat this procedure on the opposite side 6 Raise and lower the machine from the ground con trol several times to ensure that the switch is func tioning properly NOTE From the platform raise and low...

Page 83: ...e the sensor as described in the image above NOTE The sensor is spring loaded DO NOT rotate past its internal stops 4 Install the rotary angle sensor cover and secure to the frame with the two screws...

Page 84: ...e the Tilt Sen sor 1 and Sensor Mount 2 from the Ground Con trol Box 4 The Tilt Sensor 1 can be removed from the Sensor Mount 2 by removing the three Screws 4 NOTE Follow the above procedures in rever...

Page 85: ...ment below the platform 2 Slowly lift the arm stack with the forktruck while the manual descent valve is being engaged this allows the oil to drain back into the tank 3 Place machine on safety prop an...

Page 86: ...4 7 Lift Cylin der Removal 4 The scissor arms can be removed as a complete unit or individually Removing scissor arm assembly as a complete unit 1 Remove the pin attaching the bottom scissor arms to t...

Page 87: ...SECTION 3 CHASSIS SCISSOR ARMS 31215074 3 45 Figure 3 30 Arms and Platform Positioning and Support G o t o D i s c o u n t E q u i p m e n t c o m t o o r d e r y o u r p a r t s...

Page 88: ...9 10 11 Figure 3 31 Scissors Arms Assembly 1930ES 1 Arm Assembly 2 Capscrew 3 Lock Nut 4 Lower SidePad 5 Arm Pivot Pin 6 AngleSensor Switch 7 Agle Sensor Mount 8 Capscrew 9 Cable 10 Lock Nut 11 Spring...

Page 89: ...5 6 7 9 MAF21020D 1001131005 D Figure 3 32 Scissors Arms Assembly 2032ES 1 Arm Assembly 2 Capscrew 3 Cable 4 Angle Sensor Mount 5 Lock Nut 6 Lock Nut 7 Lower SidePad 8 Arm PivotPin 9 Spring 10 Capscre...

Page 90: ...1 10 6 6 MAF21030A 1001190904 A Figure 3 33 Scissors Arms Assembly 2632ES 1 Capscrew 2 Cable 3 AngleSensor Mount 4 Lock Nut 5 Lock Nut 6 Lower SidePad 7 Arm PivotPin 8 Spring 9 Capscrew 10 Angle Senso...

Page 91: ...10 10 1 12 3 7 9 2 5 8 13 6 Figure 3 34 Scissors Arms Assembly 2646ES and 3246ES 1 Capscrew 2 Cable 3 AngleSensor Mount 4 Lock Nut 5 Lock Nut 6 Lower SidePad 7 Arm Pivot Pin 8 Spring 9 Capscrew 10 Tap...

Page 92: ...may have to only loosen the two power bolts and remove the two closest the top in order to get to the printed circuit board located in the top of the control box where the drive lift select switch is...

Page 93: ...2 5 0 1 VDC Output FullPositive Reverse Deflection 4 0 1 VDC Output FullNegative Forward Deflection 1 0 1 VDC Table 3 8 Connector Chart CONNECTOR PINOUT Term Color Function 1 RED HANDLECOM 2 VIOLET TR...

Page 94: ...ith a quote for the right part that your machine needs We sell worldwide for the brands Genie Terex JLG MultiQuip Mikasa Essick Whiteman Mayco Toro Stone Diamond Products Generac Magnum Airman Haulott...

Page 95: ...er position therefore when the control is released the spool auto matically returns to neutral prohibiting any flow through the circuit Relief Valves Main relief valves are installed at various points...

Page 96: ...achine power and carefully disconnect hydraulic hose from cylinder extend port 6 Activate pump motor and retract cylinder Check extend port for leakage 7 If extend port leakage is less than 6 8 drops...

Page 97: ...n 2 Continue to elevate the platform until the fill plug located on the right side of the tank attached to the lift cylinder is fully accessible CAUTION ENSURE THE SCISSOR ARMS ARE PROPERLY SUPPORTED...

Page 98: ...the platform empty elevate machine and swing safety prop out of it s stowed position CAUTION ENSURE THE SCISSOR ARMS ARE PROPERLY SUPPORTED 2 Locate the Lower and Upper Slide Pads and wipe pressure w...

Page 99: ...ENTS FROM THE LIFT CYLINDER ASSEMBLY 3 Remove the valves connectors the two battery cables and the manual decent cable NOTE To avoid having to readjust the manual descent remove the large nut located...

Page 100: ...215074 1 BatteryCables 2 Valves 3 ManualDescent 4 SteerHoses 5 TopCylinderBolt Torque41ft lbs 6 BottomCylinderBolt Figure 4 2 LIft Cylinder Removal G o t o D i s c o u n t E q u i p m e n t c o m t o...

Page 101: ...driver carefully push one end of the round retaining ring back towards the inside of the cylinder and then slip the screw driver tip under that end Pull the ring out of the groove toward the wall mout...