Maxon RA-35 Maintenance Manual
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Maxon RA-35 Maintenance Manual

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M-13-03
REV. C
MAY 2016
MAINTENANCE MANUAL
RA-35 & RA-45
© MAXON Lift Corp. 2016

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Summary of Contents for Maxon RA-35

  • Page 1 M-13-03 REV. C MAY 2016 MAINTENANCE MANUAL RA-35 & RA-45 © MAXON Lift Corp. 2016...
  • 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-13-03, REVISION C ............. 5 WARNINGS & SAFETY INSTRUCTIONS ................6 LIFTGATE TERMINOLOGY ....................8 PERIODIC MAINTENANCE ....................10 PERIODIC MAINTENANCE CHECKS ................10 PERIODIC MAINTENANCE CHECKLIST ................11 CHECKING HYDRAULIC FLUID ..................12 CHANGING HYDRAULIC FLUID ..................14 PLATFORM GAP &...

  • Page 5: Summary Of Changes: M-13-03, Revision C

    SUMMARY OF CHANGES: M-13-03, REVISION C PAGE DESCRIPTION OF CHANGE COVER Updated REV and date of release. 20-75 Removed parts explosion illustrations and parts lists. Revised stow signal electrical schematic to refl ect relay and wire changes.

  • Page 6: Warnings & Safety Instructions

    Comply with the following WARNINGS and SAFETY INSTRUCTIONS while maintaining Liftgates. See Operation Manual for operating safety requirements. WARNINGS & SAFETY INSTRUCTIONS WARNING • Do not stand, or allow obstructions, under the platform when lowering the Liftgate. Be sure your feet are clear of the Liftgate.
  • Page 7 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

    LIFTGATE TERMINOLOGY WALL MOUNT UP/DOWN SWITCH FRAME ASSEMBLY POWER PACK UP-DOWN SWITCH IN-OUT SWITCH SAFETY ARM HYDRAULIC LOCK HYDRAULIC CYLINDER PLATFORM HYDRAULIC SLIDER DRIVE ASSEMBLY MOTOR LATCH RELEASE HANDLE LIFT ARM TILT ARM FLIPOVER RETENTION RAMPS...
  • Page 9 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 10: Periodic Maintenance

    Check for rust and oily surfaces on Liftgate. If there is rust or oil on Liftgate, clean it off. Touch up the paint where bare metal is showing. MAXON recommends using the aluminum primer touchup paint kit, P/N 908134-01.

  • Page 11: 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 12: Checking Hydraulic Fluid

    PERIODIC MAINTENANCE 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 4. If needed, add fl uid to the reservoir as follows. Remove fi ller cap (FIG. 13-1). Fill the reservoir with hydraulic fl uid to the FULL mark (FIG. 13-1). Reinstall FILLER fi ller cap (FIG. 13-1). FULL MARK CAUTION Pump cover must be correctly se- cured to prevent it from becoming a hazard.

  • Page 14: Changing Hydraulic Fluid

    PERIODIC MAINTENANCE 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 4. Remove fi ller cap (FIG. 15-1). Add 1.85 gallons (7.4 qt) of hydraulic fl uid to reservoir. Hydraulic fl uid should at the FILLER FULL mark (FIG. 15-1). Reinstall fi ller cap (FIG. 15-1). FULL MARK 5. Stow the lift and do the CHECKING HYDRAULIC FLUID procedure in this section of the manual.

  • Page 16: Platform Gap & Stop Adjustment

    PLATFORM GAP & STOP ADJUSTMENT NOTE: Refer to Operating Instructions decal and applicable WARNING & CAUTION decals. NOTE: Park vehicle on level ground and unload vehicle before doing this procedure. 1. Run slide assembly out and unfold the fl ipover. Then, raise platform to fl oor level making sure not to hit trailer wall (FIG.
  • Page 17 3. With platform at fl oor level, turn stop block bolts COUNTERCLOCKWISE until butted against each lift arm as shown in FIGS. 17-1 and 17-1A. This will prevent the platform from hitting the trailer wall. TRAILER WALL PLATFORM TRAILER FLOOR PLATFORM FLUSH WITH VEHICLE FLOOR FIG.

  • Page 18: Decals

    DECALS CAUTION DECAL P/N 282683-02 CAPACITY DECAL CAUTION DECAL DECAL “A” (RA-35 ONLY) P/N 282682-02 P/N 220388-04 DECAL “F” CAPACITY DECAL (RA-45 ONLY) P/N 220388-05 DECAL “B” DECAL “C” FAMILY OWNED DECAL P/N 283445-01 OPERATION DECAL P/N 282664-01 SERIAL PLATE (REF)
  • Page 19 DECAL SHEET P/N 282522-01 FIG. 19-1...
  • Page 20 DECALS - Continued DECAL P/N 282713-01 DECAL P/N 264507 DECAL “J” DECAL “I” DECAL “L” DECAL “F” DECAL DECAL “F” DECAL “M” “L” DECAL DECAL “M” DECAL “K” P/N 282721-01 DECAL “K” MAXON CONSPICUITY TAPE (BOTH SIDES) P/N 908150-01 FIG. 20-1...
  • Page 21 DECAL SHEET P/N 282724-01 FIG. 21-1...

  • Page 22: System Diagrams

    SYSTEM DIAGRAMS PUMP & MOTOR SOLENOID OPERATION “S2” VALVE “S1” VALVE “S3” VALVE PORT B PORT L PORT T PORT A MOTOR STARTER SOLENOID PUMP AND MOTOR FIG. 22-1 POWER UNIT MOTOR & SOLENOID OPERATION SOLENOID OPERATION MEANS ENERGIZED) LIFTGATE PORT FUNCTION VALVE...

  • Page 23: Hydraulic Schematic

    HYDRAULIC SCHEMATIC CYLINDERS LOCK VALVES HYDRAULIC MOTOR FLOW CONTROL FLOW CONTROL VALVE (2 GPM) VALVE (2 GPM) 1.5 GPM 1.5 GPM (OUT) (IN) VALVE CHECK CHECK VALVE VALVE FLOW CONTROL VALVE (4 GPM) FILTER VALVE VALVE CHECK (TEST PORT) VALVE CHECK VALVE 1500 PSI...

  • Page 24: Electrical Schematic

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC FIG. 24-1...

  • Page 25: Stow Signal Electrical Schematic

    STOW SIGNAL ELECTRICAL SCHEMATIC FIG. 25-1...

  • Page 26: Troubleshooting

    TROUBLESHOOTING PLATFORM WILL NOT RAISE & MOTOR WILL NOT RUN 1. Connect voltmeter between motor solenoid terminal “B” and ground wires connection on pump (FIG. 26-1). Verify that full battery voltage is at is at “B”. Recharge the battery if voltmeter indicates less than 12.6 volts dc. STARTER SOLENOID TERMINAL “A”...

  • Page 27: Platform Will Not Raise, But Motor Runs

    PLATFORM WILL NOT RAISE, BUT MOTOR RUNS 1. Do the CHECKING HYDRAULIC FLUID procedure in this manual. RESERVOIR If necessary, add hydraulic fl uid. 2. Check for structural damages and replace worn parts. RELIEF ADJUSTMENT VALVE COVER CHECKING THE RAISING RELIEF VALVE FIG.

  • Page 28: Platform Raises But Leaks Down

    TROUBLESHOOTING PLATFORM RAISES BUT LEAKS DOWN 1. Check if the “A” (lowering) solenoid valve is constantly energized. Connect voltmeter VALVE “C” negative (-) lead to ground (-) LOWERING wires connection on pump and SOLENOID VALVE positive (+) lead to (+) terminal on the “A”...
  • Page 29 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 during maintenance.

  • Page 30: Platform Raises Partially Then Stops

    TROUBLESHOOTING PLATFORM RAISES PARTIALLY THEN STOPS 1. Lower the open platform to the ground. Do the CHECKING RESERVOIR HYDRAULIC FLUID procedure in this manual, If necessary, add hydraulic fl uid. 2. Use voltmeter to verify the battery voltage is 12.6 volts or more under load from pump motor.
  • Page 31 5. Check the hydraulic cylinder. With platform RELIEF at vehicle fl oor level, remove the hydraulic PORT line from the RELIEF port on the cylinder (FIG. 31-1). Hold the control switch in the CYLINDER RAISE position for two seconds while you RAISE watch for hydraulic fl...

  • Page 32: Liftgate Will Not Lift Rated Capacity

    TROUBLESHOOTING LIFTGATE WILL NOT LIFT RATED CAPACITY 1. Use voltmeter to verify the TEST battery voltage is 12.6 volts or PORT more under load from pump motor. PRESSURE 2. Check for structural damage GAUGE or lack of lubrication. Replace warn parts. RELIEF VALVE ADJUST SCREW ADJUSTMENT...
  • Page 33 5. Check the hydraulic cylinder. With the platform at vehicle fl oor level, remove the hydraulic line from the RELIEF port on the cylinder (FIG. 33-1). Hold RELIEF the control switch in the “RAISE” position for two PORT seconds while you watch for hydraulic fl uid at the RELIEF port.

  • Page 34: Platform Will Not Lower, Lowers Too Slowly, Or Too Quickly

    TROUBLESHOOTING PLATFORM WILL NOT LOWER, LOWERS TOO SLOWLY, OR TOO QUICKLY 1. Connect voltmeter (+) lead to motor solenoid terminal “B” and the (-) lead to the ground wires connection on pump (FIG. 34-1). Verify that full battery voltage VALVE “C” is at “B”.
  • Page 35 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 during maintenance. CAUTION To prevent damage to fl...

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Ra-45

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