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Maxon GPSLR Series Maintenance Manual

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M-08-14
REV. F
APRIL 2020
MAINTENANCE MANUAL
GPSLR-33 & GPSLR-44; GPSTLR-33 & GPSTLR-44
© MAXON Lift Corp. 2020

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  • Page 1 M-08-14 REV. F APRIL 2020 MAINTENANCE MANUAL GPSLR-33 & GPSLR-44; GPSTLR-33 & GPSTLR-44 © MAXON Lift Corp. 2020...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SUMMARY OF CHANGES: M-08-14, REVISION H ............. 4 WARNINGS ........................... 5 SAFETY INSTRUCTIONS ....................6 LIFTGATE TERMINOLOGY ....................7 PERIODIC MAINTENANCE ....................9 PERIODIC MAINTENANCE CHECKS .................. 9 PERIODIC MAINTENANCE CHECKLIST ................10 CHECKING HYDRAULIC FLUID ..................12 CHANGING HYDRAULIC FLUID ..................

  • Page 4: Summary Of Changes: M-08-14, Revision H

    SUMMARY OF CHANGES: M-08-14, REVISION H PAGE DESCRIPTION OF CHANGE COVER Updated REV, date of release and cover image. Cover image and applicable Illustrations throughout manual are updated to show new impact-absorbing tubes on the back of the slider frame. This contents of this manual applies only to GPSLR liftgates equipped with standard control switches.

  • Page 5: Warnings

    Comply with the following WARNINGS and SAFETY INSTRUCTIONS while maintaining 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 6: 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 7: Liftgate Terminology

    LIFTGATE TERMINOLOGY INTERNAL CONTROL SWITCH SAFETY CHAIN SLIDER ASSY (INCLUDES MAIN BEAM) EXTERNAL PLATFORM CONTROL BUFFERS SWITCHES FRAME ASSY HYDRAULIC CYLINDER HYDRAULIC LOCK PLATFORM FLIPOVER POWER PACK TILT ARM LIFT ARM DUAL RETENTION RAMPS...
  • Page 8 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 9: 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 10: Periodic Maintenance Checklist

    PERIODIC MAINTENANCE CHECKLIST NOTE: Make sure vehicle is parked on level ground while performing maintenance checks. Quarterly or 1250 Cycles (whichever occurs fi rst) Check the level and condition of the hydraulic fl uid. Visually check all hoses and fi ttings for chafi ng and fl uid leaks. Tighten loose fi ttings or replace parts as required.
  • Page 11 NOTE: Lube fi ttings are shown for the LH cylinder, lift arm, and tilt arm. There are also lube fi ttings at the same places on the RH cylinder, lift arm, and tilt arm. Refer to lubrication diagram (FIG. 11-1) to fi nd the lube fi...

  • Page 12: 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 13 ISO 32 HYDRAULIC OIL RECOMMENDED PART NUMBER BRANDS CHEVRON HIPERSYN 32 KENDALL GOLDEN MV SHELL TELLUS S2 VX 32 EXXONMOBIL UNIVIS N-32, DTE-24 TABLE 13-1 ISO 15 OR MIL-H-5606 HYDRAULIC OIL RECOMMENDED PART NUMBER BRANDS CHEVRON FLUID A, AW-MV-15 KENDALL GLACIAL BLU SHELL TELLUS S2 VX 15...

  • Page 14: 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 15 CAUTION Do not fi ll reservoir to the FULL mark FLUID on the dipstick. Hydraulic fl uid can 3/4” LEVEL overfl ow from the reservoir. FILLER CAP 4. Remove fi ller cap (FIG. 15-1). Add 1 RESERVOIR gallon of hydraulic fl uid to the reservoir. Hydraulic fl...

  • Page 16: Platform Adjustment

    PLATFORM ADJUSTMENT NOTE: Park vehicle on level ground and unload vehicle before doing this procedure. 1. Lower platform to ground and unfold fl ipover (FIG. 16-1A). LIMIT BOLT 2. Loosen adjustment and limit bolts on both sides of platform (FIG. 16-1B). TILT ADJUSTMENT ADJUSTMENT (RH SHOWN)
  • Page 17 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 18: Drive Chain Adjustment

    DRIVE CHAIN ADJUSTMENT NOTE: Improperly adjusted drive chains cause slide frame binding. Normal slide frame runout speed is from 5-8 seconds. 1. Lower the slide frame so it can be moved out. See GPSLR/GPSTLR Operations Manual (M-08-13). 2. Move the slide frame out (FIG. 18-1). See GPSLR/GPSTLR Operations Manual (M-08-13).
  • Page 19 4. Adjust the chain with smallest measured di- mension, to match the chain with longest measured dimension, as follows. Loosen chain adjuster nut at the rear of the chain rail assem- bly. Then, turn the front adjuster nut clockwise to extend the shortest chain to match the longest chain dimension (FIGS.

  • Page 20: Decals

    DECALS CAUTION DECAL P/N 282682-01 CAUTION DECAL P/N 283989-01 CAUTION DECAL P/N 282683-01 DECAL “A” DECAL “C” DECAL “B” DECAL “F” DECAL “E” PARTS QR CODE DECAL P/N 299349-02 OPERATION DECAL P/N 282681-01 SERIAL PLATE (REF) FIG. 20-1...
  • Page 21 GPSLR-33 & GPSTLR-33 ONLY GPSLR-44 & GPSTLR-44 ONLY MODEL DECAL SHEET P/N DECAL “B” GPSLR-33 267431-01 3300 POUNDS GPSLR-44 267431-02 4400 POUNDS GPSTLR-33 267431-01 3300 POUNDS GPSTLR-44 267431-02 4400 POUNDS TABLE 21-1...
  • Page 22 DECALS - Continued DECAL P/N 264507 DECAL “L” MAXGRIP DECAL DECAL P/N 283293-01 “K” DECAL “F” DECAL “L” DECAL DECAL DECAL “M” “I” DECAL “J” “A” DECAL “L” DECAL “K” DECAL DECAL “K” DECAL DECAL “B” “H” “L” DECAL DECAL “M” “H”...
  • Page 23 DECAL SHEET P/N 267432-01 FIG. 23-1...

  • Page 24: System Diagrams

    SYSTEM DIAGRAMS PUMP & MOTOR SOLENOID OPERATION “S2” VALVE “S1” VALVE “S3” VALVE PORT B PORT L PORT A MOTOR STARTER SOLENOID LOCK VALVE LOCK VALVE ON CYLINDER FIG. 24-1 POWER UNIT MOTOR & SOLENOID OPERATION SOLENOID OPERATION MEANS ENERGIZED) TAIL LIFT PORT FUNCTION...

  • Page 25: Hydraulic Schematic

    HYDRAULIC SCHEMATIC CYLINDERS LOCK VALVES LOCK HYDRAULIC CYLINDER MOTOR FLOW FLOW CONTROL CONTROL VALVE (2 GPM) VALVE (2 GPM) (OPEN) (CLOSE) VALVE CHECK CHECK VALVE VALVE FLOW CONTROL VALVE (4 GPM) 1500 1500 +/-150 +/-150 CHECK (TEST PORT) VALVE VALVE VALVE CHECK VALVE...

  • Page 26: Electrical Schematic

    ELECTRICAL SCHEMATIC FIG. 26-1...

  • Page 27: Troubleshooting

    TROUBLESHOOTING TO BE PROVIDED IN FUTURE UPDATE...

This manual is also suitable for:

Gpslr-33Gpslr-44Gpstlr-33Gpstlr-44

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