Maxon MXT-25 Installation Manual
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Maxon MXT-25 Installation Manual

Liftgate
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M-20-09
REV. A
DECEMBER 2020
To fi nd maintenance & parts information for your MXT-25 or MXT-33 Liftgate, go to
www.maxonlift.com. Click the PRODUCTS, TUK-A-WAY and MXT-25/MXT-33 buttons. Open
the Maintenance Manual in the PRODUCT DOCUMENTATION window. For parts, click on
the PARTS PORTAL, TUK-A-WAY and MXT-25/MXT-33 buttons.
© 2020 MAXON Lift Corp.
DRAFT 12-15-20

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Summary of Contents for Maxon MXT-25

  • Page 1 REV. A DECEMBER 2020 To fi nd maintenance & parts information for your MXT-25 or MXT-33 Liftgate, go to www.maxonlift.com. Click the PRODUCTS, TUK-A-WAY and MXT-25/MXT-33 buttons. Open the Maintenance Manual in the PRODUCT DOCUMENTATION window. For parts, click on the PARTS PORTAL, TUK-A-WAY and MXT-25/MXT-33 buttons.

  • Page 2: Table Of Contents

    WARNINGS ........................... 5 SAFETY INSTRUCTIONS ....................6 NOTICE ..........................6 STANDARD LIFTGATE COMPONENTS ................7 MXT-25 & MXT-33 INSTALLATION PARTS BOXES ............. 8 MXT-25 & MXT-33 MANUALS & DECALS ................9 VEHICLE REQUIREMENTS ....................10 CENTER OF MASS ......................12 STEP 1 - ATTACH EXTENSION PLATE TO VEHICLE ............
  • Page 3 TABLE OF CONTENTS - Continued DECALS & PLATES ......................60 TOUCHUP GALVANIZED FINISH ..................61 SYSTEM DIAGRAMS ......................62 PUMP & MOTOR SOLENOID OPERATION (GRAVITY DOWN) ........62 HYDRAULIC SCHEMATIC (GRAVITY DOWN) ..............63 ELECTRICAL SCHEMATIC (GRAVITY DOWN) ..............64 PUMP &...

  • Page 4: Summary Of Changes: M-20-09, Revision A

    SUMMARY OF CHANGES: M-20-09, REVISION A PAGE DESCRIPTION OF CHANGE COVER Updated REV. and date of release. Changed dimensions for 38” - 46” bed height clearances. Changed dimensions for platform cutout area Added Note to check with body manufacturer before modifying rear sill and for best practices to reinforce coutout areas in rear sill.

  • Page 5: 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 6: Safety Instructions

    Liftgate. NOTICE NOTICE • Maxon Lift is responsible for the instructions to correctly install MAXON Liftgates on trucks or trailers only. • Liftgate installers, not Maxon Lift, are responsible for reviewing and complying with all applicable Federal, State, and Local regulations pertaining to the trailer or truck.

  • Page 7: Standard Liftgate Components

    If parts and components are missing or incorrect, call: Maxon Customer Service Call (800) 227-4116 or Send e-mail to cservice@maxonlift.com EXTENSION PLATE DUAL STEP KIT PARTS BOX B MXT-25 OR MXT-33 LIFTGATE PARTS BOX A OR C LIFTGATE COMPONENTS FIG. 7-1 DRAFT 12-15-20...

  • Page 8: Mxt-25 & Mxt-33 Installation Parts Boxes

    MXT-25 & MXT-33 INSTALLATION PARTS BOXES ITEM NOMENCLATURE OR DESCRIPTION QTY. PART NUMBER PARTS BOX A 297502-01 SPRING CLIP 050079 PLASTIC TIE, 12-14” 206864 #10 LOOM CLAMP 801681 SCREW TAPPING #10 X 1/2” LG. 030458 CABLE ASSEMBLY, 2 GA, 48” LG.

  • Page 9: Mxt-25 & Mxt-33 Manuals & Decals

    MXT-25 & MXT-33 MANUALS & DECALS To fi nd maintenance and parts information for your MXT-25 or MXT-33 Liftgate, go to www.maxonlift.com. Click the PRODUCTS, TUK-A-WAY and MXT-25/MXT-33 but- tons. Open the Maintenance Manual in the PRODUCT DOCUMENTATION window. For parts, click on the PARTS PORTAL, TUK-A-WAY and MXT-25/MXT-33 buttons.

  • Page 10: Vehicle Requirements

    NOTE: Maximum and Minimum Operating Bed Height for Standard Platforms: • Maximum bed height for MXT-25 and MXT-33 Liftgates on low bed vehicles is 46” (unloaded). Minimum bed height on low bed vehicles is 38” (loaded). See MXT-25 and MXT-33 LOW BED CLEARANCES, FIGS. 10-1 and 10-1A.
  • Page 11 VEHICLE REQUIREMENTS - Continued CAUTION • To prevent platform from being damaged, make sure vehicle frame is cut cor- rectly. If the cutouts are incorrect, platform may hit vehicle frame or underbody when stowing the Liftgate. • Installer is responsible for ensuring that vehicle body and frame modifi cations do not adversely affect the integrity of the body and frame.

  • Page 12: Center Of Mass

    CENTER OF MASS CENTER OF MASS 12-11/16” 20-15/16” MXT-25 & MXT-33 CENTER OF MASS (ALUMINUM PLATFORM, STOWED POSITION) FIG. 12-1 CENTER OF MASS 12-7/16” 20-11/16” MXT-25 & MXT-33 CENTER OF MASS (STEEL PLATFORM, STOWED POSITION) FIG. 12-2 DRAFT 12-15-20...

  • Page 13: Step 1 - Attach Extension Plate To Vehicle

    To preserve the corrosion-resistant properties of the galvanized fi nish, MAXON recommends bolting the galvanized extension plate to vehicle. NOTE: MXT-25 & MXT-33 Liftgate extension plate comes with bolt holes so it can be bolted to vehicle body with optional bolt kit. GRADE 8 bolts are re- quired.
  • Page 14 STEP 1 - ATTACH EXTENSION PLATE TO VEHICLE - Continued 102” 100-1/2” 95-1/2” 85” 80” 75” 65” 58” 51” 44” 37” 27” 22” 17” 1-1/4” 1-1/2” 6-1/2” 6-1/2” USE 9/16” DRILL REAR (19 PLACES) SILL 3-1/8” REAR SILL - HOLE LOCATIONS FOR 102” WIDE VEHICLE FIG.
  • Page 15 STEP 1 - ATTACH EXTENSION PLATE TO VEHICLE - Continued CAUTION CAUTION The mating surface between the bolt-on extension plate and vehicle rear sill must be as fl at as possible. Interference between the mating surfaces could result in a distorted top surface of extension plate when all the bolts are tightened.

  • Page 16: Weld Extension Plate (Alternate Method)

    WELD EXTENSION PLATE (ALTERNATE METHOD) CAUTION To preserve the corrosion-resistant properties of the galvanized fi nish, MAXON recommends bolting the galvanized extension plate to vehicle. CAUTION To protect the original paint system if equipped, a 3” wide area of paint must be removed from all sides of the weld area before welding.
  • Page 17 STEP 1 - ATTACH EXTENSION PLATE TO VEHICLE - Continued EXTENSION PLATE VEHICLE BODY WELD LENGTH & SPACE: 3/16” 2” - 11 3/4” (96” WIDE VEHICLE) 2” - 12 1/2” (102” WIDE VEHICLE) EXTENSION PLATE WELDS - VIEWED FROM UNDERNEATH FIG.

  • Page 18: Step 2 - Weld Liftgate To Vehicle

    STEP 2 - WELD LIFTGATE TO VEHICLE NOTE: MXT-25 and MXT-33 Liftgates are equipped with mounting plates installed at the factory. Mounting plate widths are shown based upon truck frame widths. Ensure you have the correct mounting plate kit for your application.
  • Page 19 STEP 2 - WELD LIFTGATE TO VEHICLE - Continued 1. Unfold the platform and fl ipover (FIG. 19-1). PLATFORM (UNFOLDED) FLIPOVER (UNFOLDED) PLATFORM & FLIPOVER UNFOLDED FIG. 19-1 DRAFT 12-15-20...
  • Page 20 STEP 2 - WELD LIFTGATE TO VEHICLE - Continued CAUTION To prevent damage to the fl ipover, NEVER hoist the Liftgate by the fl ipover as shown in FIG. 20-2. Hoist the Liftgate by the platform only as shown in FIG.
  • Page 21 STEP 2 - WELD LIFTGATE TO VEHICLE - Continued CAUTION Prevent damage to hydraulic hoses. If welding next to hydraulic hoses, use a protective cover such as a welding blanket to cover the hoses. CAUTION To protect the original paint system, if equipped, a 3” wide area of paint must be removed from all sides of the weld area before welding.

  • Page 22: Step 3 - Attach Optional Battery Box & Frame To Vehicle (If Equipped)

    STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE (IF EQUIPPED) RECOMMENDED CONFIGURATION NOTE: Make sure the Liftgate power unit, and all batteries on the vehicle for the power unit, are connected correctly to a common chassis ground. 1.
  • Page 23 STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE (IF EQUIPPED) - Continued 2. Select holes on top of battery box LOCK LOCK NUT WASHER frame to align mounting brackets WASHER fl ush to cross members. Refer to CROSS FIGS.
  • Page 24 STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE (IF EQUIPPED) - Continued NOTE: The hanger brackets for the battery box frame can either be bolted or welded to the cross members of the vehicle body. 3. To bolt hanger brackets to cross CROSS members, use hanger brackets as MEMBER...
  • Page 25 STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE (IF EQUIPPED) - Continued WARNING Recommended practices for welding on steel parts are contained in the cur- rent AWS (American Welding Society) D1.1 Structural Welding Code - Steel. Damage to Liftgate and/or vehicle, and personal injury can result from welds that are done incorrectly.
  • Page 26 STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE (IF EQUIPPED) - Continued WARNING Remove all rings, watches and jewelry before doing any electrical work. NOTE: Always connect fused end of power cable to battery positive (+) terminal. NOTE: To connect charge lines, refer to instructions provided with each charge line kit.
  • Page 27 STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE (IF EQUIPPED) - Continued NOTE: Always connect fused end of power cable to battery positive (+) terminal. GROUND CABLE TO PUMP BOX OR COMMON CHASSIS GROUND, 74” LG. (BATTERY BOX KIT ITEM) (-) BATTERY CABLE TO COMMON GROUND...
  • Page 28 STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE (IF EQUIPPED) - Continued WARNING Explosive hydrogen gas from charging batteries can accumulate in battery box if not vented from the box. To prevent hydrogen gas from accumulating, ensure the 3 ventilation holes in battery box are not plugged or covered. VENTILATION HOLES BATTERY BOX ASSEMBLY (REAR VIEW SHOWN) FIG.
  • Page 29 STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE (IF EQUIPPED) - Continued LOCK NUT, 1/4”-20 175 AMP FUSED (2 PLACES) FLAT WASHER CABLE TO PAN HEAD SCREW 1/4” PUMP BOX 1/4”-20 X 1” LG. (4 PLACES) GROUND CABLE FROM (2 PLACES) VEHICLE BATTERY GROUND CABLE...

  • Page 30: Step 4 - Run Power Cable

    STEP 4 - RUN POWER CABLE NOTE: Make sure the Liftgate power unit, and all batteries on the vehicle for the power unit, are connected correctly to a common chassis ground. RECOMMENDED CONFIGURATION 1. Liftgate powered from TRUCK BATTERIES, TYPICAL LOCATION truck batteries is typically installed on trucks as 175 AMP...
  • Page 31 STEP 4 - RUN POWER CABLE - Continued CAUTION Never route an energized wire. Make sure the vehicle battery is disconnected. Always route electrical wires clear of moving parts, brake lines, sharp edges and exhaust systems. Avoid making sharp bends in wiring. Attach securely. If drilling is necessary, fi...

  • Page 32: Step 5 - Connect Power Cable

    STEP 5 - CONNECT POWER CABLE Unbolt and remove pump cover (FIG. 32-1). UNBOLTING PUMP COVER FIG. 32-1 DRAFT 12-15-20...
  • Page 33 STEP 5 - CONNECT POWER CABLE - Continued NOTE: Electrical lines must be run into pump box through sealing grommets (FIG. 33-3). To ensure a good seal on hydraulic and electrical lines, never cut the sealing grommets. 2. Run fused power cable through bottom COPPER TERMINAL LUG grommet on pump mounting plate (FIG.

  • Page 34: Step 6 - Connect Ground Cable

    STEP 6 - CONNECT GROUND CABLE NOTE: Electrical lines must be run into pump box through sealing grommets (FIG. 34-1A). To ensure a good seal on the electrical lines, never cut the sealing grommets. NOTE: To ensure power unit is correctly grounded, connect 2 gauge ground cable to grounding connection on pump.
  • Page 35 STEP 6 - CONNECT GROUND CABLE - Continued NOTE: If there is a grounding point on the frame, use it to connect ground cable. Then, skip the step for drilling a hole. NOTE: Clean the ground cable connection point on the frame down to bare metal. 4.

  • Page 36: Step 7 - Install Control Switch

    STEP 7 - INSTALL CONTROL SWITCH 1. Measure, mark and drill one 3/4” hole and two 5/32” holes in the vertical post on curb side of USE 5/32” DRILL (2 PLACES) vehicle body as shown in FIG. 36-1. VEHICLE BODY VERTICAL POST (CURB SIDE) 2.
  • Page 37 STEP 7 - INSTALL CONTROL SWITCH - Continued NOTE: Electrical lines must be run into pump box through sealing grommets (FIGS. 37-1, 37-2, 38-1 and 38-2). To ensure a good seal on the elec- trical lines, never cut the sealing grommets. GREEN BLACK CONTROL...
  • Page 38 STEP 7 - INSTALL CONTROL SWITCH - Continued CONTROL GROMMET SWITCH BLACK WIRE DRIP WHITE LOOP WIRE GREEN WIRE MOTOR (REF) MAX ECU MODULE CONTROL SWITCH WIRING CONNECTIONS (MAX ECU, GRAVITY DOWN) FIG. 38-1 MAX ECU MODULE BRASS JUMPER (TERMINALS 3 & 4) HEX HEAD NUT, (2 PLACES) CONTROL...

  • Page 39: Step 8 - Checking Hydraulic Fluid

    STEP 8 - 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 40 STEP 8 - CHECKING HYDRAULIC FLUID - Continued ISO 32 HYDRAULIC OIL RECOMMENDED BRANDS PART NUMBER ROSEMEAD ROSEMEAD MV150 EXXONMOBIL MOBIL DTE 10 EXCEL 32 EXXONMOBIL UNIVIS N-32, DTE-24 CHEVRON CHEVRON AV MV32 CHEVRON HIPERSYN 32 U.S. PRESTIGE PRESTIGE AW HVI 32 KENDALL GOLDEN MV SHELL...

  • Page 41: Step 9 - Connect Power Cable To Battery

    STEP 9 - CONNECT POWER CABLE TO BATTERY NOTE: MAXON recommends using dielectric grease on battery cable connections. POSITIVE (+) 1. Remove nut from negative (-) bat- BATTERY CABLE tery terminal. Disconnect negative (-) battery cable (FIG. 41-1). POSITIVE (+)

  • Page 42: Step 10 - Remove Locking Brackets & Check For Interference

    STEP 10 - REMOVE LOCKING BRACKETS & CHECK FOR INTERFERENCE CAUTION Do not fully pressurize the system in this step. Fully pressurize the system and check for hydraulic leaks after Liftgate is fully welded. 1. Push control switch to UP position and hold just enough time to pressurize hydraulic system.
  • Page 43 STEP 10 - REMOVE LOCKING BRACKETS & CHECK FOR INTERFERENCE - Continued NOTE: To operate Liftgate, locking brackets must be removed from cylinders. 4. Remove locking brackets from LH and RH cylinder (FIG. 43-1). CYLINDER LOCKING BRACKETS CYLINDER (2 PLACES) FLAT WASHER BOLT...
  • Page 44 STEP 10 - REMOVE LOCKING BRACKETS & CHECK FOR INTERFERENCE - Continued 5. Unbolt and discard knuckle down bracket locking bolts from LH and RH sides of Liftgate (FIGS. 44-1 and 44-1A). LOCKING BOLT LOCK NUT KNUCKLE DOWN BRACKET JAM NUT FIG.
  • Page 45 STEP 10 - REMOVE LOCKING BRACKETS & CHECK FOR INTERFERENCE - Continued NOTE: Correct any interference problems before continuing with installation. 6. Raise platform to bed height (FIG. 45-1). Then, lower platform to the ground (FIG. 45-2). Look for any interference between liftgate and vehicle as platform is raised and lowered.
  • Page 46 STEP 10 - REMOVE LOCKING BRACKETS & CHECK FOR INTERFERENCE - Continued NOTE: Correct any fi t and interference problems before continuing with installation. 8. Raise platform to bed height (FIG. 46-1). Check for 3/4” gap between heel of platform and edge of extension plate (FIG.
  • Page 47 STEP 10 - REMOVE LOCKING BRACKETS & CHECK FOR INTERFERENCE - Continued NOTE: Correct any fi t and interference problems before continuing with installation. 9. Ensure top surface of platform SURFACES FLUSH and extension plate are fl ush at the RH and LH sides of plat- form (FIGS.

  • Page 48: Step 11 - Adjust Platform Opener

    STEP 11 - ADJUST PLATFORM OPENER To adjust openers, remove cap screw and OPENER ASSEMBLY hex nut from opener bracket (FIG. 48-1). Rotate opener assembly to the correct hole position (FIG. 48-2 and TABLE 48-1). Rein- stall cap screw and nut. OPENER BRACKET SCREW...

  • Page 49: Step 12 - Adjust Platform (If Required)

    STEP 12 - ADJUST PLATFORM (IF REQUIRED) NOTE: Before doing the following procedures, make sure vehicle is parked on level ground. 1. With the platform and fl ipover unfolded, raise platform to bed level (FIG. 49-1). Measure how much the outboard edge of platform rises above fl...
  • Page 50 STEP 12 - ADJUST PLATFORM (IF REQUIRED) - Continued 2. If the tip of the platform is less than 1/2” above fl oor level (FIG. 50-1), turn both RH and LH platform adjust- ment bolts clockwise until the platform tip is 1/2” to 2”...

  • Page 51: Step 13 - Finish Welding Liftgate To Vehicle

    STEP 13 - FINISH WELDING LIFTGATE TO VEHICLE CAUTION Prevent damage to hydraulic hoses. Before welding next to hydraulic hoses, protect the hoses with a heat-resistant cover such as a welding blanket. Weld each of the two mounting plates as shown in FIG. 51-1. LONG SILL VEHICLE FRAME (TYPICAL TRUCK FRAME...

  • Page 52: Step 14 - Bolt Optional Steps To Extension Plate

    STEP 14 - BOLT OPTIONAL STEPS TO EXTENSION PLATE 1. Lower platform to the ground (FIG. 52-1). PLATFORM LOWERED TO GROUND FIG. 52-1 WARNING To prevent accidental personal injury and equipment damage, disconnect (-) battery cable and (+) cable from battery.
  • Page 53 STEP 14 - BOLT OPTIONAL STEPS TO EXTENSION PLATE - Continued CAUTION To prevent interference with Liftgate and possible damage, maintain 90º angle between steps and extension plate. Tighten bolts only in the order shown in illustration. NOTE: If 102” extension kit is to be installed for 102” wide vehicle, install the exten- sion kit before installing the steps.
  • Page 54 STEP 14 - BOLT OPTIONAL STEPS TO EXTENSION PLATE - Continued 4. Bolt the step support (Kit item) to mounting channel (Kit item) I-BEAM (FIG. 54-1). (VEHICLE BODY) MOUNTING CHANNEL FRAME BOLT, 1/2” X 3-1/2” LG. (2 PLACES) LH STEP LOCK NUT (3 PLACES) STEP SUPPORT...
  • Page 55 STEP 14 - BOLT OPTIONAL STEPS TO EXTENSION PLATE - Continued NOTE: Before welding mounting channel to vehicle body, ensure step is straight and steps are in vertical position. WELD TO AS MUCH 3/16” I-BEAM FLANGE & 3/16” REAR SILL AS POSSIBLE 7.
  • Page 56 STEP 14 - BOLT OPTIONAL STEPS TO EXTENSION PLATE - Continued 9. Repeat instructions 3 through 8 for RH step. Use the RH step as- sembly (Kit item). 10. Reconnect power to the pump by POSITIVE (+) POSITIVE (+) reconnecting positive (+) and nega- BATTERY CABLE BATTERY POST tive (-) cables to battery (FIG.

  • Page 57: Step 15 - Vehicle Taillight Positioning

    STEP 15 - VEHICLE TAILLIGHT POSITIONING NOTE: Taillights may interfere with Liftgate. Taillights and attaching hardware are not provided with the Liftgate. If needed, install vehicle taillights to comply with state and federal vehicle lighting requirements, such as FMVSS 108. DRAFT 12-15-20...

  • Page 58: Attach Decals: Mxt-25 & Mxt-33

    ATTACH DECALS: MXT-25 & MXT-33 NOTE: Preferred decal layout is shown. Decals on the Liftgate are attached at the factory. If vehicle does not permit this layout, decals in the manual and decal kit must be applied so that they are easily visible when approaching vehicle to operate Liftgate.
  • Page 59 ATTACH DECALS - Continued DECAL SHEET P/N 282522-01 FIG. 59-1 MODEL DECAL P/N CAPACITY MXT-25 220382 2500 POUNDS [1134 KG] MXT-33 220388-02 3300 POUNDS [1500 KG] CAPACITY DECALS TABLE 59-1 DRAFT 12-15-20...

  • Page 60: Decals & Plates

    DECALS & PLATES QR CODE DECAL 299348-09 SERIAL PLATE (REF) MAXON NAME PLATE P/N 280004-01 FIG. 60-1A FIG. 60-1 DRAFT 12-15-20...

  • Page 61: Touchup Galvanized Finish

    If bare metal is exposed on galvanized portions of the Liftgate, touch up the galvanized fi nish. To maintain the protection provided by the original galvanized fi nish, MAXON recommends cold galvanize spray. DRAFT 12-15-20...

  • Page 62: System Diagrams

    SYSTEM DIAGRAMS PUMP & MOTOR SOLENOID OPERATION (GRAVITY DOWN) “C1” DIRECTION OF CONTROLLED FLOW STARTER MOTOR SOLENOID “S1” VALVE JUNCTION BLOCK GRAVITY DOWN POWER UNIT FIG. 62-1 POWER UNIT MOTOR & SOLENOID OPERATION SOLENOID OPERATION MEANS ENERGIZED) LIFTGATE PORT FUNCTION VALVE LOCK MOTOR...

  • Page 63: Hydraulic Schematic (Gravity Down)

    SYSTEM DIAGRAMS - Continued HYDRAULIC SCHEMATIC (GRAVITY DOWN) FIG. 63-1 DRAFT 12-15-20...

  • Page 64: Electrical Schematic (Gravity Down)

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC (GRAVITY DOWN) FIG. 64-1 DRAFT 12-15-20...

  • Page 65: Pump & Motor Solenoid Operation (Power Down)

    SYSTEM DIAGRAMS - Continued PUMP & MOTOR SOLENOID OPERATION (POWER DOWN) “C2” “C1” DIRECTION OF CONTROLLED FLOW OFF TIME DELAY MODULE STARTER MOTOR SOLENOID “S1” VALVE POWER DOWN MODULE POWER DOWN POWER UNIT FIG. 65-1 POWER UNIT MOTOR & SOLENOID OPERATION SOLENOID OPERATION MEANS ENERGIZED) LIFTGATE...

  • Page 66: Hydraulic Schematic (Power Down)

    SYSTEM DIAGRAMS - Continued HYDRAULIC SCHEMATIC (POWER DOWN) VALVE “S1” FIG. 66-1 DRAFT 12-15-20...

  • Page 67: Electrical Schematic (Power Down)

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC (POWER DOWN) FIG. 67-1 DRAFT 12-15-20...

  • Page 68: Pump & Motor Solenoid Operation With Max Ecu Module

    SYSTEM DIAGRAMS - Continued PUMP & MOTOR SOLENOID OPERATION WITH MAX ECU MODULE (GRAVITY DOWN) “C1” DIRECTION OF CONTROLLED FLOW STARTER MOTOR SOLENOID “S1” VALVE MAX ECU MODULE GRAVITY DOWN POWER UNIT WITH MAX ECU MODULE FIG. 68-1 POWER UNIT MOTOR & SOLENOID OPERATION SOLENOID OPERATION MEANS ENERGIZED) LIFTGATE...

  • Page 69: Hydraulic Schematic With Max Ecu Module (Gravity Down)

    SYSTEM DIAGRAMS - Continued HYDRAULIC SCHEMATIC WITH MAX ECU MODULE (GRAVITY DOWN) FIG. 69-1 DRAFT 12-15-20...

  • Page 70: Electrical Schematic With Max Ecu Module (Gravity Down)

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC WITH MAX ECU MODULE (GRAVITY DOWN) FIG. 70-1 DRAFT 12-15-20...

  • Page 71: Pump & Motor Solenoid Operation With Max Ecu Module

    SYSTEM DIAGRAMS - Continued PUMP & MOTOR SOLENOID OPERATION WITH MAX ECU MODULE (POWER DOWN) “C2” “C1” DIRECTION OF CONTROLLED FLOW STARTER SOLENOID MOTOR “S1” VALVE MAX ECU MODULE OFF TIME DELAY MODULE POWER DOWN POWER UNIT FIG. 71-1 POWER UNIT MOTOR & SOLENOID OPERATION SOLENOID OPERATION MEANS ENERGIZED) LIFTGATE...

  • Page 72: Hydraulic Schematic With Max Ecu Module (Power Down)

    SYSTEM DIAGRAMS - Continued HYDRAULIC SCHEMATIC WITH MAX ECU MODULE (POWER DOWN) VALVE “S1” FIG. 72-1 DRAFT 12-15-20...

  • Page 73: Electrical Schematic With Max Ecu Module (Power Down)

    SYSTEM DIAGRAMS - Continued ELECTRICAL SCHEMATIC WITH MAX ECU MODULE (POWER DOWN) FIG. 73-1 DRAFT 12-15-20...

  • Page 74: Electrical Values & Torque Specifications

    SYSTEM DIAGRAMS - Continued ELECTRICAL VALUES & TORQUE SPECIFICATIONS Solenoid Switch Coil resistance: 5.4Ω @70ºF. ±15% 20.1Ω @70ºF. ±15% Ampere: 2.2A 1.2A Coil terminal torque: 10-15 lb-in max. Contact terminal torque: 30-35 lb-in max. Solenoid Valve (S1) Coil resistance: 6.2Ω @ 70ºF. ±15% 35.8Ω...

  • Page 75: Options

    OPTIONS OPTIONAL LIFTGATE COMPONENTS MECHANICAL KITS PART NO. EXTENSION KIT 102”, 13” EXTENSION PLATE, GALVANIZED 287095-03G ELECTRICAL KITS PART NO. IN CAB ON-OFF SWITCH 298905-01 TUK-A-WAY DUAL CONTROL KIT 297115-01 TUK-A-WAY DUAL CONTROL KIT, STREET SIDE 297116-01 HAND HELD CONTROL ASSEMBLY, INSIDE 280570-07 HAND HELD CONTROL ASSEMBLY, 120”...
  • Page 76 OPTIONS OPTIONAL LIFTGATE COMPONENTS - CONTINUED STEP OPTIONS (38” TO 42” BED HEIGHT, 21” OVERALL STEP HEIGHT) GALVANIZED SINGLE STEPS WITH BUMPERS PART NO. SINGLE STEPS, 14” RUBBER BUMPERS 288705-11G SINGLE STEPS, 13.5” PLASTIC BUMPERS 288705-12G GALVANIZED SINGLE STEPS WITH BUMPERS NO STEPS ON STREET SIDE PART NO.

  • Page 77: Pre-Delivery Inspection Form

    Important! This pre-delivery checklist is to aid the installer in confi rming the proper installation of this Maxon product. It is not a comprehensive list and does not replace the use of the installation manual. The installer is responsible for following all instructions in the installation manual.

This manual is also suitable for:

Mxt-33

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