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Maxon GPSLR Series Maintenance Manual

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M-18-10
MAY 2023
REV B
© MAXON Lift Corp. 2023

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Summary of Contents for Maxon GPSLR Series

  • Page 1 M-18-10 MAY 2023 REV B © MAXON Lift Corp. 2023...
  • Page 3 MAXON agrees to replace any components which are found to be defective during the fi rst 2 years of service, and will reimburse for labor based on MAXON’s Liftgate Warranty Flat Rate Schedule.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS SUMMARY OF CHANGES: M-18-10, REVISION B ............. 5 WARNINGS ........................... 6 SAFETY INSTRUCTIONS ....................7 LIFTGATE TERMINOLOGY- GPSLR ..................8 LIFTGATE TERMINOLOGY- RA ................... 9 PERIODIC MAINTENANCE ....................10 PERIODIC MAINTENANCE CHECKS ................10 PREVENTATIVE MAINTENANCE CHECKLIST ..............11 CHECKING HYDRAULIC FLUID ..................

  • Page 5: Summary Of Changes: M-18-10, Revision B

    SUMMARY OF CHANGES: M-18-10, REVISION B PAGE DESCRIPTION OF CHANGE COVER Updated REV. and date of release. Updated RA-44 model to RA-45. Illustrations changed to new design. Corrected PM task numbers 1 to 20. Updated lubrication diagram. 14-15 Updated checking hydraulic fl uid procedure for new power unit. Updated hydraulic oil tables.

  • Page 6: Warnings

    Comply with the following WARNINGS and SAFETY INSTRUCTIONS while installing Liftgates. See Operation Manual for operating safety requirements. WARNING Installing and maintaining a liftgate can expose you to chemicals, including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To mini- mize exposure, install and maintain liftgate in a well-ventilated area and wear proper Personal protective equipment (PPE).

  • Page 7: Safety Instructions

    Listen for scraping, grat- ing and binding noises and correct the problem before continuing to operate Liftgate. • Use only Maxon Authorized Parts for replacement parts. Provide Liftgate model and serial num- ber information with your parts order. Order replacement parts from: MAXON LIFT CORP.

  • Page 8: Liftgate Terminology- Gpslr

    LIFTGATE TERMINOLOGY- GPSLR LATCH RELEASE HANDLE SAFETY CHAIN INTERNAL CONTROL SWITCH POWER UNIT SLIDER ASSEMBLY JUNCTION INSTALLATION FRAME LATCH RELEASE HANDLE HYDRAULIC CYLINDER PLATFORM LIFT ARM FLIPOVER FRAME ASSEMBLY PARALLEL CART STOPS...

  • Page 9: Liftgate Terminology- Ra

    LIFTGATE TERMINOLOGY- RA WALL MOUNT SWITCH MAIN SLIDER JUNCTION ASSEMBLY MAIN CONTROL LATCH SWITCH RELEASE HANDLE PUMP BOX (SIDE-MOUNTED) HYDRAULIC PLATFORM CYLINDER FRAME ASSEMBLY LIFT ARM TILT ARM FLIPOVER DUAL RETENTION RAMP...

  • Page 10: Periodic Maintenance

    PERIODIC MAINTENANCE PERIODIC MAINTENANCE CHECKS WARNING Never operate the Liftgate if parts are loose or missing. NOTE: Make sure vehicle is parked on level ground while performing the maintenance checks. Quarterly or 1250 Cycles (whichever occurs fi rst) Check the hydraulic fl uid level in the pump reservoir. Refer to the CHECKING HYDRAULIC FLUID procedure in the PERIODIC MAINTENANCE section.

  • Page 11: Preventative Maintenance Checklist

    MAXON Annual / 5000 Cycles Liftgate PM Procedures Change hydraulic fl uid. Satisfactory Repair Required Corrected For more detailed information, please refer to the applicable sections in this Maintenance Manual and the separate Parts Portal. Use only genuine Maxon replacement parts for all repairs.
  • Page 12 PERIODIC MAINTENANCE CHECKLIST NOTE: Lube fi ttings are shown for the LH cylinder, lift arm, and parallel arm. There are also lube fi ttings at the same places on the RH cylinder, lift arm, and parallel arm. Refer to lubrication diagram (FIG. 12-1) to fi nd the lube fi ttings on gear drives, cylinders and arms.
  • Page 13 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 14: Checking Hydraulic Fluid

    CHECKING HYDRAULIC FLUID CAUTION Keep dirt, water and other contaminants from entering the hydraulic system. Before opening the hydraulic fl uid reservoir fi ller cap, drain plug and hydrau- lic lines, clean up contaminants that can get in the openings. Also, protect the openings from accidental contamination.
  • Page 15 5. Reinstall and latch the pump cover as LATCH shown in FIG. 15-1. (2 PLACES) POWER UNIT (REF) PUMP COVER REINSTALL PUMP COVER FIG. 15-1 ISO 32 HYDRAULIC FLUID RECOMMENDED PART NUMBER BRANDS ROSEMEAD MV150 CHEVRON AV MV32 U.S. PRESTIGE AW HVI 32 EXXONMOBIL DTE 10 EXCEL 32...

  • Page 16: Changing Hydraulic Fluid

    CHANGING HYDRAULIC FLUID CAUTION Keep dirt, water and other contaminants from entering the hydraulic system. Before opening the hydraulic fl uid reservoir fi ller cap, drain plug and hydrau- lic lines, clean up contaminants that can get in the openings. Also, protect the openings from accidental contamination.
  • Page 17 FILLER CAP 4. Remove fi ller cap (FIG. 17-1). Fill the reservoir with hydraulic fl uid to fi ll level RESERVOIR range (FIG. 17-1). Reinstall fi ller cap (FIG. 17-1). 5. Run the Liftgate through 3 complete cycles. Lower platform to ground. Con- fi...

  • Page 18: Platform Adjustment

    PLATFORM ADJUSTMENT CAUTION Operate Liftgate with caution and no load until installation is complete. NOTE: Refer to Operating Instructions decal and applicable WARNING & CAUTION decals. 1. Move the platform out (FIG. 18-1) until slider mounting plate bolts hit the stop roll- SLIDER ers (FIG.
  • Page 19 3. Lower platform to ground level (FIG. 19-1). Ensure platform tip and shackle touch ground. PLATFORM SHACKLE PLATFORM LOWERED TO GROUND FIG. 19-1 4. Raise platform to trailer fl oor height and level it with trailer fl oor (FIG. 19-2) using adjustment bolts on lift arms (both sides) to raise or lower platform (FIG.
  • Page 20 PLATFORM ADJUSTMENT- Continued 5. Remove and unbolt stop roller from initial hole in slider stop bracket (FIGS. 20-1 and 20-1A). Bolt stop roller into the stop bracket hole which moves the plat- form to within 1” of side sill (FIGS. 20-1 and 20-1B). Torque each bolt to 160 lb-ft.
  • Page 21 6. If platform hits the side sill, measure and mark crossmembers all the way across, and cut the platform end to fi t the door opening as shown in (FIGS. 21-1 and 21-1A). TRAILER FLOOR PLATFORM SIDE SILL FIG. 21-1A DOOR OPENING PLATFORM END...
  • Page 22 PLATFORM ADJUSTMENT- Continued 7. Ensure platform is fl ush with vehicle fl oor. If platform gap is 1” or less (FIG. 22-1), use adjustment bolts, located at stop rollers, to adjust platform end to approximately 5/8” gap from side sill (FIGS. 22-1 and 22-1A). Torque each bolt to 160 lb-ft.
  • Page 23 CAUTION Operate Liftgate with caution and no load until installation is complete. NOTE: Refer to Operating Instructions decal and applicable WARNING & CAUTION decals. 8. Operate the Liftgate to ensure correct operation without binding or hitting side sill.

  • Page 24: Decals

    DECALS CAUTION DECAL CAUTION DECAL P/N 282682-05 P/N 282683-05 DECAL “A” DECAL “F” CAPACITY DECAL 24-1 (SEE TABLE OPERATION DECAL DECAL “B” P/N 283024-03 DECAL “C” FIG. 24-1 MODEL ORDER P/N DECAL “C” GPSLR/GPSLRT-35 220388-04 3500 LB (1600 KG) GPSLR/GPSLRT-44 253155 4400 LB (2000 KG) GPSLR/GPSLRT-55...
  • Page 25 DECAL SHEET P/N 282522-01 FIG. 25-1...
  • Page 26 DECALS - Continued MAXON PLATE P/N 280004-01 SERIAL PLATE (REF) BATTERY WARNING DECAL P/N 283023-01 QR PARTS DECAL (RA ONLY) P/N 299349-03 QR PARTS DECAL DECAL (GPSLR ONLY) “K” P/N 299349-04 DECAL DECAL “L” “L” DECAL DECAL DECAL “H” “L”...
  • Page 27 DECAL SHEET P/N 267432-03 FIG. 27-1...

  • Page 28: System Diagrams

    SYSTEM DIAGRAMS PUMP & MOTOR SOLENOID OPERATION - SINGLE PUMP LOCK VALVE (2 PLACES) MOTOR LOCK VALVE (S2) (RH CYLINDER SHOWN) FIG. 28-2 S3 VALVE STARTER S1 VALVE SOLENOID POWER UNIT S3 VALVE FIG. 28-1 (BI-DIRECTIONAL) FIG. 28-3 POWER UNIT MOTOR & SOLENOID OPERATION SOLENOID OPERATION MEANS ENERGIZED) LIFTGATE...

  • Page 29: Pump & Motor Solenoid Operation - Dual Pumps

    PUMP & MOTOR SOLENOID OPERATION - DUAL PUMPS LOCK VALVE STARTER (2 PLACES) SOLENOID #2 MOTOR #2 LOCK VALVE (S2) (RH CYLINDER SHOWN) FIG. 29-2 “S1” VALVE “S3” VALVE STARTER MOTOR #1 SOLENOID #1 POWER UNIT S3 VALVE FIG. 29-1 (BI-DIRECTIONAL) FIG.

  • Page 30: Hydraulic Schematic - Gravity Down

    SYSTEM DIAGRAMS - Continued HYDRAULIC SCHEMATIC - GRAVITY DOWN HYDRAULIC MOTOR LH CYLINDER RH CYLINDER HYDRAULIC LOCK VALVE (BI-DIRECTIONAL) HYDRAULIC HYDRAULIC FLOW LOCK VALVE LOCK VALVE (S2) CONTROL (BI-DIRECTIONAL) (BI-DIRECTIONAL) VALVE (3 GPM) TANK C1 OUTLET C2 OUTLET RETURN PORT PORT 1800 PSI AUX, PUMP...

  • Page 31: Hydraulic Schematic - Power Down

    HYDRAULIC SCHEMATIC - POWER DOWN HYDRAULIC MOTOR LH CYLINDER RH CYLINDER HYDRAULIC LOCK VALVE (BI-DIRECTIONAL) FLOW CONTROL HYDRAULIC HYDRAULIC VALVE (3 GPM) LOCK VALVE LOCK VALVE (BI- (BI-DIRECTIONAL) DIRECTIONAL) C2 OUTLET C1 OUTLET TANK PORT PORT RETURN (PLUGGED) 1800 PSI AUX, PUMP ASSEMBLY 2750 PSI...

  • Page 32: Electrical Schematic, 12V, Gravity Down, With Max Ecu

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC, 12V, GRAVITY DOWN, WITH MAX ECU FIG. 32-1...
  • Page 33 FIG. 33-1...

  • Page 34: Electrical Schematic, 12V, Power Down, With Max Ecu

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC, 12V, POWER DOWN, WITH MAX ECU FIG. 34-1...
  • Page 35 FIG. 35-1...

  • Page 36: Electrical Schematic 12V/24V, Gravity Down

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC 12V/24V, GRAVITY DOWN FIG. 36-1...
  • Page 37 FIG. 37-1...

  • Page 38: Electrical Schematic, 12V/24V, Power Down

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC, 12V/24V, POWER DOWN FIG. 38-1...
  • Page 39 FIG. 39-1...

  • Page 40: Troubleshooting

    TROUBLESHOOTING TO BE PROVIDED IN FUTURE UPDATE...

This manual is also suitable for:

Ra seriesGpslr-35Gpslr-44Gpslr-55Gpslrt-35Gpslrt-44 ... Show all

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