Dhollandia DH-VHT 44 Instruction Manual
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Dhollandia DH-VHT 44 Instruction Manual

Dhollandia DH-VHT 44 Instruction Manual

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DH-VHT 44 / 55 / 66
INSTALLATION MANUAL
Manufacturer:
DHOLLANDIA US, L.L.C.
E-mail : Technical.US@dhollandia.com
270 Southridge Parkway
Bessemer City North Carolina, 28016
website : www.dhollandia.com
Read the manual in its entirety before operating the liftgate
Keep this manual in the vehicle cab, as reference for the driver and liftgate operator
Order ref: xxx Doc: FIT_VHT_US_EN_2021
Rev: 1 Date: SEPTEMBER 1, 2023

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Summary of Contents for Dhollandia DH-VHT 44

  • Page 1 DH-VHT 44 / 55 / 66 INSTALLATION MANUAL Manufacturer: DHOLLANDIA US, L.L.C. E-mail : Technical.US@dhollandia.com 270 Southridge Parkway Bessemer City North Carolina, 28016 website : www.dhollandia.com Read the manual in its entirety before operating the liftgate Keep this manual in the vehicle cab, as reference for the driver and liftgate operator...

  • Page 2: Table Of Contents

    Prescribed torques values for bolts supplied with liftgate ......................42 16.3 PDI checklist 1/2..................................44 16.4 Safe operator position on the platform ............................47 16.5 Circuit breaker ................................... 49 16.6 Cab cut off switch ..................................50 16.7 Electric and hydraulic Information ............................. 51 16.8 End note ....................................53 DHOLLANDIA...

  • Page 3: Understanding Safety And Warning Signs

    Many safety signs and symbols used in this manual are based on international standards, others refer to specific situations or actions. • Consult Appendix 1 for an overview of signs and symbols used in DHOLLANDIA manuals, and their meaning. Make sure you understand these signs and symbols prior to starting the installation. Examples of standard ANSI...

  • Page 4: Introduction And Disclaimers

    It provides you with general instructions applicable to the common truck and trailer types. It might be possible that specific issues particular to your installation case are not adequately covered by this manual. If in doubt, please contact your local DHOLLANDIA distributor for further assistance.
  • Page 5 • DHOLLANDIA disclaims any liability for damage arising from modifications to the vehicle in its entirety as a result from installation. All modifications to the vehicle must be done in accordance to instructions issued by the vehicle and body manufacturer.

  • Page 6: Contact Information

    It contains general instructions applicable to the most common types of trucks and trailers. Possibly, specific issues particular to your case are not adequately covered by this manual. If in doubt, contact your national DHOLLANDIA distributor for further assistance prior to continuing.

  • Page 7: Safety Precautions For Operation

    These instructions are supplied as a separate manual with your liftgate. • You can also contact the national DHOLLANDIA distributor for the latest edition of this manual. See page 4 for contact info. Or download the latest edition from the website: www.dhollandia.com →...
  • Page 8 DHOLLANDIA liftgate. • In case of doubt, ALWAYS contact the national DHOLLANDIA distributor for further advice, prior to continuing. • ALWAYS wear appropriate Personal Protective Equipment. This includes but may not be limited to: ANSI rated glasses with side guards, or a wrap-around face shield;...
  • Page 9 Except for the support channels and bracing of the side steps, which are usually welded to the cross members of the auxiliary chassis, DHOLLANDIA liftgates are designed as a bolt-on system, and don’t require any welding. See Appendix 2 for prescribed torque values.

  • Page 10: Liftgate Terminology

    Base section of the platform: inboard platform section. Folding point: outboard platform section. Flip ramp: load restraint device preventing rolling loads from rolling unintentionally off the outboard platform edge. Flashing lights: platform mounted lights to make platform visible in public traffic. DHOLLANDIA...
  • Page 11 DHOLLANDIA...
  • Page 12 Lift height stop: if closed, platform will stop flush with vehicle bed level. If opened, platform will lift higher above bed level Fixed cross member: first, most inboard platform section mounted fixed between the lift runners. The platform [10-11-12] pivots around this member Lock for flip ramp: locking device for locking flip ramp in its travel position DHOLLANDIA...
  • Page 13 DHOLLANDIA...
  • Page 14 Auxiliary pump unit: only used when the main pump unit is defect. BEFORE usage ALWAYS contact a certified Dhollandia service agent for support. Switching between pump unit can be done by selecting MOTOR 1 (main pump unit) or MOTOR 2 (auxiliary pump unit) on the pump unit control panel.

  • Page 15: Getting Started

    • DHOLLANDIA disclaims any liability for damage arising from modifications to the vehicle in its entirety as a result from installation. All modifications to the vehicle must be done in accordance to instructions issued by the vehicle and body manufacturer.

  • Page 16: Installation Dimensions

    Where chassis beams, longs sills, the rear sill and other steel chassis or body components have been cut, grinded, drilled, etc…, the installer should apply adequate anti-corrosive coating to protect the vehicle and body against corrosion. Check, and make sure you comply with the instructions of the OEM vehicle manufacturer. DHOLLANDIA...

  • Page 17: Dimensions Of Vehicle

    7 DIMENSIONS OF VEHICLE CLEARANCE DIMENSIONS Figure 7.1 DHOLLANDIA...
  • Page 18 Figure 7.2 DHOLLANDIA...
  • Page 19 • In case of using steel filler plates or additional materials ALWAYS check with the body constructor or DHOLLANDIA if these add- ons match the strength requirements for mounting the DH-VHT liftgate. Failure to do this can result in damage, personal injury or death.

  • Page 20: Preparation Of The Vehicle Body

    If the vehicle walls need extra reinforcements, it is necessary to add the following supports to the vehicle corner posts. Minimum required material: Structural Rectangular Tubing. 4” x 2” ASTM-A36 General Purpose Steel. For flatbed body vehicles or extra questions please contact your nearby official Dhollandia service agent. NOTICE For flatbed body vehicles or extra questions please contact your nearby official Dhollandia service agent.

  • Page 21: Mounting Of The Lift Frame (Premounted Platform)

    The platform and attached lift frame are very heavy! When falling on a person, they can cause serious personal injury or death. • Therefore, handle the platform and attached lift frame with great care. Use hoists and a gantry crane or forklift to raise the platform and attached lift frame in their correct mounting position. DHOLLANDIA...
  • Page 22 For liftgate with an integrated floor extension, this is the height whereby the top side of the floor extension or cylinder beam is flush with the vehicle loading floor. For other lifts, source the correct height from the FITTING DRAWING. DHOLLANDIA...
  • Page 23 (For a DH-VHT liftgate with other dimension check the TECHNICAL DRAWINGS of the specific lift.) • DIAGONAL 1 and DIAGONAL 2 should be always equal to each other with a tolerance of MAX. ¼” to make sure the lift frame is perfectly squared. DHOLLANDIA...

  • Page 24: Welding Of The Liftframe

    Disconnect the battery terminals prior to welding. Welding should be done by qualified personnel only, and only to the extent that such is not forbidden by the manufacturer of the vehicle. • If you intend to weld, beware of precautions below: DHOLLANDIA...
  • Page 25 • Check the column centres at the top, middle and bottom of the columns. Adjust the alignment if required. • If disconnected, reconnect the power pack to the liftgate. Connect the power pack to an external battery. DHOLLANDIA...
  • Page 26 It is important to weld the INSIDES of the columns first, then the OUTSIDES. • Finish by welding the threshold to the bed of the vehicle. • Space all welds evenly across each column and along the vehicle threshold. DHOLLANDIA...
  • Page 27 ¼ ¼ ¼ ¼ ¼ DHOLLANDIA...

  • Page 28: Installation Of Control Switch

    S – Control valve (Close/Tilt up) in the power pack O – Electrical self-locking valves (Open/Tilt/Down) on the tilt cylinders I – Control valve (Slide In) in the power pack U – Control valve (Slide In) in the power pack DHOLLANDIA...

  • Page 29: Wiring For Additional Controlswitch On Inside Beam

    10.1 WIRING FOR ADDITIONAL CONTROLSWITCH ON INSIDE BEAM The control switch and relay MUST be correctly wired to the connection block for proper operation. [Figure 11.8] ▪ DHOLLANDIA...

  • Page 30: Connection To The Batteries

    11 CONNECTION TO THE BATTERIES ▪ A general schematic of how to correctly connect the batteries to the liftgate is provided in Figure 11.1. Figure 11.1 DHOLLANDIA...
  • Page 31 • If not supplied with the liftgate, these can be downloaded from the “DOWNLOAD” section on our website: http://www.dhollandia.com • Please confirm you have reviewed the most up-to-date version of this manual prior to continuing. •...

  • Page 32: Putting The Liftgate Into Service

    Where chassis beams, longs sills, the rear sill and other steel chassis or body components have been cut, grinded, drilled, welded etc…, the installer should apply adequate anti-corrosive coating to protect the vehicle and body against corrosion. Check, and make sure you comply with the instructions of the OEM vehicle manufacturer. DHOLLANDIA...

  • Page 33: Lubrication Instructions

    During weight test, verify if the hydraulic pump pressure suits the maximum rated lift capacity in this particular mounting situation. Adjust the pressure if too high or too low, seal the pressure relief valve after that using the provided tamper-evident cap. DHOLLANDIA...
  • Page 34 Figure 14.1 Figure 14.2 DHOLLANDIA...

  • Page 35: Decals

    • NEVER remove or paint over any decal. Missing, worn or illegible warning decals must ❷ ❺ ❻ be immediately replaced. Get free replacement decals from DHOLLANDIA. ❸ Contact your regional DHOLLANDIA distributor. See page 4 for contact info. ❹...
  • Page 36 ❶ ❷ ❸ ❹ ❺ ❻ DHOLLANDIA...
  • Page 37 ❼ DHOLLANDIA...
  • Page 38 • Always check if these decals are located on the right location. The stickers should always be placed under the chain attachment and above the end stop on the left beam of the VHT liftgate. End stop DHOLLANDIA...

  • Page 39: Use Of The 'Warning. Liftgate Out Of Service. Do Not Attempt To Operate' Sign

    ‘WARNING. LIFTGATE OUT OF SERVICE. DO NOT ATTEMPT TO OPERATE’ sign provided with the liftgate on a position clearly visible to other potential operators. See examples below. The liftgate MUST not be used again until it has been serviced or repaired by a qualified service technician. EF0586.US EXAMPLE DHOLLANDIA...

  • Page 40: Identification Decals

    15.3 IDENTIFICATION DECALS Every DHOLLANDIA liftgate is identified and labelled with a unique 8-digit serial number (with or without a space between the first and last 4 digits). This number is used for any inquiry on a particular liftgate, or when ordering replacement parts In addition to the liftgate type and serial number, the various serial number labels provide additional information such as: the maximum rated lift capacity and load chart, the bumper certification number, the date of manufacture, etc…...

  • Page 41: Appendix

    16.1 IMPORTANT SIGNS WARNING signs MANDATORY ACTION signs Overview and keep visual control over the working Contact your regional DHOLLANDIA distributor. area of the liftgate at all times. Consult the DHOLLANDIA website. General warning sign used to alert the user to potential hazards.
  • Page 42 Switch OFF the electrical power to the liftgate via the main battery disconnect switch and / or cabin switch. This is an operation to be executed manually (as opposed to an electrical function controlled by means of one of the control units). DHOLLANDIA...

  • Page 43: Prescribed Torques Values For Bolts Supplied With Liftgate

    Type of thread Size Strength class 10.9 Standard M6 x 1 M8 x 1.25 M10 x 1.5 M12 x 1.75 M14 x 2 M16 x 2 Fine M14 x 1.5 M16 x 1.5 M20 x 1.5 M24 x 2 DHOLLANDIA...
  • Page 44 M20 x 1.5 lbs-ft lbs-ft M24 x 2 lbs-ft lbs-ft Banjo Bolt Torque Specifications BSPP Metric Newton Pounds Force Newton Pounds Force Banjo Banjo Bolt Metre (Nm) - Feet (lbsf-ft) Metre (Nm) - Feet (lbsf-ft) Bolt Size Size 10.5 24.5 136.5 DHOLLANDIA...

  • Page 45: Pdi Checklist 1/2

    The requirement for mechanical or hydraulic stabilizing legs has been checked and been fulfilled (if applicable). The actual fitting dimensions don’t exceed the theoretical maximum fitting dimensions mentioned in the fitting drawings. The lift has been fitted to conform with the fitting instructions of DHOLLANDIA, and the Body Building Guidelines of the OEM vehicle manufacturer.
  • Page 46 7- General operation, practical tests Unfolding and folding test: ▢ The platform opener is mounted in adequate position. When LOWERED at the ground, the platform stands just inside from vertical position. ▢ The platform unfolds and folds without touching the vehicle chassis. DHOLLANDIA...
  • Page 47 Operating a liftgate that hasn’t successfully passed the PDI can put the operator and third parties at great risk and could result in serious personal injury or death. • It is therefore essential that the PDI check is completed with due diligence, and any shortcomings rectified prior to delivery of the vehicle to the operator. DHOLLANDIA...

  • Page 48: Safe Operator Position On The Platform

    • To reduce the risk that the operator falls from the platform, DHOLLANDIA recommends that the installer mounts a handgrip to the rear frame of the vehicle body. Such handgrip will enable the operator to ALWAYS maintain 4 points of contact while lifting or lowering on the platform.
  • Page 49 Figure 15.3 DHOLLANDIA...

  • Page 50: Circuit Breaker

    16.5 CIRCUIT BREAKER ▪ A resettable circuit breaker option is also available for the connection to the batteries. [Figure 15.4] Figure 15.4 DHOLLANDIA...

  • Page 51: Cab Cut Off Switch

    Refer to the appropriate connection sequence in Figure 19.10 to properly connect the E0667 illuminated cab switch. Figure 15.5 Figure 15.6 • For orders that shipped with option OAE510.15, refer to Figure 15.7 to properly connect the cab switch. Figure 15.7 DHOLLANDIA...

  • Page 52: Electric And Hydraulic Information

    The correct diagram applicable for the liftgate supplied can be found on the inside of the control box. If correct diagram is not present inside control box, contact the national DHOLLANDIA distributor for further assistance, or download from the website.
  • Page 53 1. Standard oil: ISO VG 22. This common and widely available hydraulic oil is used in the majority of DHOLLANDIA lifts, sold for use in “normal” climate conditions. This includes all countries excluding the Nordic countries suffering very cold winter climate. Refer to the product specifications of Q8 - Haydn ISO VG 22 (*) attached for further technical details.

  • Page 54: End Note

    16.8 END NOTE • DHOLLANDIA would like to thank you for using our products and leave you with this final notice and warning. • Additional information about this liftgate and many other DHOLLANDIA products is available at the following link: http://www.dhollandia.com...

This manual is also suitable for:

Dh-vht 55Dh-vht 66

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