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Copyright Information
Copyright © 2021 by SHENZHEN SMARTSAFE TECH CO.,LTD. All rights reserved. No part of this
publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means,
electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of
SMARTSAFE.
Neither SMARTSAFE nor its affiliates shall be liable to the purchaser of this unit or third parties for
damages, losses, costs, or expenses incurred by purchaser or third parties as a result of: Accident,
misuse, or abuse of this unit, or unauthorized modifications, repairs, or alterations to this unit, or failure
to strictly comply with SMARTSAFE operating and maintenance instructions. SMARTSAFE shall not be
liable for any damages or problems arising from the use of any options or any consumable products
other than those designated as Original SMARTSAFE Products or SMARTSAFE Approved Products by
SMARTSAFE.
All information, specifications and illustrations in this manual are based on the latest information
available at the time of printing. SMARTSAFE reserves the right to make changes at any time without
prior written or oral notice.
Trademark Information
is a registered trademark of SHENZHEN SMARTSAFE TECH CO.,LTD. in China and other
countries. All other SMARTSAFE trademarks, service marks, domain names, logos, and company
names referred to in this manual are either trademarks, registered trademarks, service marks, domain
names, logos, company names of SMARTSAFE or are otherwise the property of SMARTSAFE or its
affiliates. In countries where any of the SMARTSAFE trademarks, service marks, domain names, logos
and company names are not registered, SMARTSAFE claims other rights associated with unregistered
trademarks, service marks, domain names, logos, and company names. Other products or company
names referred to in this manual may be trademarks of their respective owners. You may not use any
trademark, service mark, domain name, logo, or company name of SMARTSAFE or any third party
without permission from the owner of the applicable trademark, service mark, domain name, logo, or
company name. You may contact SMARTSAFE by visiting the website at www.newsmartsafe.com, or
writing to SHENZHEN SMARTSAFE TECH CO.,LTD., 3310, Building 11, Tianan Cloud Park, Bantian
Street, Longgang District, Shenzhen, Guangdong, China, to request written permission to use Materials
on this manual for purposes or for all other questions relating to this manual.
Safety Precautions
 Make sure that you have read the User ' s Manual completely including relevant instructions on
installation, operation and safety before operating the lift.
 Do not use the lift if any abnormality is found in the lift.
 Do not overload the lift beyond its rated load4000KG.
 The lift can be operated by trained personnel only. The vehicle customer or the inexperienced person
is prohibited from operating the lift at will.
 The rubber pad of the small scissor lift must have contact with the support point of the vehicle,
otherwise the vehicle chassis may be damaged. (It is recommended to consult the vehicle
manufacturer by telephone if the location of the support point is not clear.)
LT840T User Manual
I

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Summary of Contents for SmartSafe LT840T

  • Page 1 SMARTSAFE. Neither SMARTSAFE nor its affiliates shall be liable to the purchaser of this unit or third parties for damages, losses, costs, or expenses incurred by purchaser or third parties as a result of: Accident, misuse, or abuse of this unit, or unauthorized modifications, repairs, or alterations to this unit, or failure to strictly comply with SMARTSAFE operating and maintenance instructions.
  • Page 2 LT840T User Manual  Be sure to perform mechanical locking after the vehicle is lifted. It is forbidden to work under the vehicle before mechanical locking is performed.  Keep the area around the lift clean and tidy as any oil stain or obstacle may pose a safety risk.
  • Page 3: Table Of Contents

    LT840T User Manual Contents 1. Product Features and Parameters ..........................1 1.1 Product features ................................1 1.2 Technical parameters ..............................1 1.3 Dimension diagram ................................ 2 1.4 Civil Work Plan ................................3 1.5 Working space layout ..............................4 1.6 Oil pipe diagram ................................5 1.7 Tips for leveling and oil-filling ............................
  • Page 5: Product Features And Parameters

    LT840T User Manual 1. Product Features and Parameters 1.1 Product features  Ultra-thin body, no pit is required.  Platform extended to 4520mm.  Aluminum alloy motor with fast heat dissipation. 1.2 Technical parameters Drive mode Direct-acting hydraulic cylinder Rated lifting capacity of main lift...
  • Page 6: Dimension Diagram

    LT840T User Manual 1.3 Dimension diagram Fig 1...
  • Page 7: Civil Work Plan

    LT840T User Manual 1.4 Civil Work Plan Fig 2...
  • Page 8: Working Space Layout

    LT840T User Manual 1.5 Working space layout Fig 3...
  • Page 9: Oil Pipe Diagram

    LT840T User Manual 1.6 Oil pipe diagram Note: Only when the platform is not balanced on both sides was the adjustment needed. Fig 4...
  • Page 10: Tips For Leveling And Oil-Filling

    LT840T User Manual 1.7 Tips for leveling and oil-filling Fig 5...
  • Page 11: Emergency Manual Lowering Procedures At Power Failure

    LT840T User Manual Fig 6 1.8 Emergency manual lowering procedures at power failure: Lift the safety jaws above the cylinders for both platforms and insert paper blocks under the safety jaws to separate them from the safety gear rack. Cut off the power and open the control cabinet cover to locate the oil return solenoid valve.
  • Page 12: Schematic Diagram For Main Components

    LT840T User Manual Fig 7 1.9 Schematic diagram for main components Turntable recess: Used to accommodate turntable for four-wheel alignment. Side slide plate: prevent rear wheel side sliding during four-wheel alignment. Stop plate: Used to prevent the vehicle from slipping out of the platform, and is set level at the lowest position.
  • Page 13: Preparation For Installation

    LT840T User Manual 2. Preparation for Installation 2.1 Unpacking All packing, loading/unloading, transportation and unpacking operations must be performed by professional personnel. Transportation: The scissor lift shall be loaded/unloaded and moved by a lifting machine and forklift with capacity over 3 tons.
  • Page 14 LT840T User Manual 2.2.1 Installation requirements The lift must be installed in accordance with the specified safe distances from walls, columns and other equipment (as shown in Fig. 10), including the minimum distance 1000mm from walls. To prevent any emergencies and for the convenience of operation, a sufficient space for exit passageway shall also be considered.
  • Page 15 LT840T User Manual Fig 11 To avoid the failure of the mechanical safety device, a wood block can be inserted at the middle of the connecting rod. When the hydraulic system is not fully filled with hydraulic oil and has the lifting and lowering actions, do not work under the lift.
  • Page 16 LT840T User Manual  Connection of power line: Connect the 380V three-phase four-wire power line (cable of 3×2.5MM 1×1.5MM ) to the control cabinet interfaces L1, L2, L3 and input terminal, and connect the PE ground wire to the marked ground bolt firstly and then to the marked ground bolts at the bottom of the two platforms (Fig.
  • Page 17 LT840T User Manual Electrical diagram Voltage :380V Phase:3 Fig 14...
  • Page 18 LT840T User Manual Voltage :220V Phase:1 Fig 15...
  • Page 19 LT840T User Manual 2.2.4 Hydraulic schematic diagram Hydraulic schematic diagram Fig 16 Pay special attention to the protection of oil pipe joint.  Lead the high-pressure oil pipe out from the main lift solenoid valve in the control cabinet and then connect it to the oil cylinder of the main lift through the PVC pipe as per the numbers of oil pipes (for details, see the Oil Circuit Connection Diagram).
  • Page 20 LT840T User Manual  Lead the Φ6×5 compressed air pipe out from the air outlet of the pneumatic solenoid valve of main lift and then connect it to the uplifted-pawl air valve of the main lift (Fig. 17) according to the Pneumatic Circuit Connection Diagram.
  • Page 21: Commissioning

    LT840T User Manual 3. Commissioning 3.1 Oil-filling and inspection: Install the lift, connect the hydraulic circuit, electrical circuit and pneumatic circuit, and then follow the following procedures: (1) Open the cover of the control cabinet and fill the hydraulic tank with 16L 46# anti-wear & anti- freezing hydraulic oil (provided by the user) with a funnel.
  • Page 22 LT840T User Manual Fig 20 Fig 21 Leveling: The level precision of the machine is a precondition of the precise detection for four- wheel alignment,therefore the machine leveling is significant.  Lift the main lift platform to the fifth or sixth gear, then press the “Lock” button to fasten the safety jaws of the left and right platforms into the safety gear rack firmly.
  • Page 23: Test

    LT840T User Manual with cement mortar. Low position leveling: When the main platform is lowered to the lowest position, the level of the platform in the low position can be adjusted by the supporting screw rods at the bottom of the main platform (See Fig.
  • Page 24: Maintenance

    LT840T User Manual troubleshooting.  For maintenance or test and adjustment in four-wheel alignment, press the “Lock” button to lock the safety jaws of two platforms at the same level. After the locking operation, the personnel can enter the lift and work under the vehicle.
  • Page 25 LT840T User Manual Exchange the phase sequence of the incoming power ① The motor rotates reversely. wires. Increase the safe pressure setting of the relief valve by ② The platform ascends with light rightward rotating the valve slightly. If there is dirtin the...
  • Page 26 LT840T User Manual ②The foundation or the machine is Readjust the machine to make it level and fill (pad) the foundation. distorted. The platform always ① The time relay is loose or rises when the Down Reinsert or replace the time relay.
  • Page 27: Exploded View Of Main Lift

    LT840T User Manual 5. Exploded View of Main Lift Fig 25...
  • Page 28 LT840T User Manual Item No. Name Item No. Name Innerscissor arm Dust seal of main cylinder nut Auxiliary arm central shaft circlip Piston sealing ring of main cylinder Upper sliding block Dust seal of slave cylinder nut Master cylinder Piston sealing ring of slave cylinder...
  • Page 29 LT840T User Manual Safety gear rack Upper shear cylinder piston sealing ring Upper shaft for auxiliary arm cylinder Cut the side oil cylinder Lower sliding block Upper shear sub-cylinder sealing ring set Outer sealing ring of main cylinder nut Slider board...
  • Page 30: Warranty

    The exclusive remedy for any automotive meter found to be defective is repair or replacement, and SMARTSAFE shall not be liable for any consequential or incidental damages.

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