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Hi-Force TWS45N - User Manual

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Operating Instruction Manual:
OM-TWS-N-01
Serial Numbers:
All
1
OPERATING INSTRUCTION MANUAL
TWS-N SERIES | HYDRAULIC TORQUE WRENCHES
- SQUARE DRIVE
Hi-Force TWS-N series of lightweight aluminium Square Drive Hydraulic Torque Wrenches are designed to
handle the toughest bolting jobs quickly and accurately. All models provide a torque accuracy of ± 3%. The
reaction arm allows the user to easily position the tool and if necessary react off the tool body in confined
situations. TWS-N Torque wrenches are available in torque capacities up to 36992 N·m at a maximum
working pressure of 700 bar (10,000 psi). This manual applies to the Hi-Force TWS-N series Hydraulic
Torque Wrenches Only. It contains the latest product information available at the time of publication and
approval. For information relating to the servicing of a Square Drive Hydraulic Torque Wrench, see the
servicing instructions, which are available on the Hi-Force website. Hi-Force reserves the right to make
changes to this document at any time without notice.
This ‘Original instructions’ document assumes that the operator carrying out any operation with this
product is trained and competent to do so. This manual does not attempt to cover all details or variations
in the equipment. Nor does this manual claim to provide for every possible contingency met in connection
with the installation, operation, or maintenance thereof. Should further information be desired, or should
a particular problem arise which is not covered in sufficient detail, the matter should be referred to
Hi-Force.

Table of Contents

Questions and Answers

  • J
    Jessica BriggsAug 14, 2025
    What to do if Hi-Force Power Tool piston will not advance or retract?
    • L
      Lorraine FieldsAug 14, 2025
      If the piston of your Hi-Force Power Tool isn't moving, check these potential causes: * Ensure couplers are securely attached to both the tool and pump. Verify correct and full engagement. * A defective coupler might be the issue; in that case, replace it. * Low oil level could be the problem. Consult the pump manual for instructions.
  • L
    Leslie FosterAug 17, 2025
    Why is my Hi-Force Power Tool making a noisy operation?
    • A
      Alicia ShepherdAug 17, 2025
      Noisy operation of your Hi-Force Power Tool can be due to several reasons: * Air trapped in the hydraulic system. Refer to the pump manual for instructions on how to bleed the air. * Air leaking into the hydraulic system. Visually inspect all areas for potential air leaks. * Low oil level. Check the pump manual for instructions.
  • G
    Glen JonesAug 21, 2025
    What to do if Hi-Force Power Tool will not build or hold pressure?
    • A
      Amanda LoweAug 21, 2025
      If your Hi-Force Power Tool isn't building or holding pressure, it could be due to: * Leaking piston or end plug seals. Replace any defective seals. * A defective coupler. Replace it with a new one.
  • J
    Justin JohnstonAug 25, 2025
    Why is my Hi-Force Power Tool movement erratic?
    • N
      nelsongregoryAug 26, 2025
      Erratic movement in your Hi-Force Power Tool can stem from: * Low oil level. Check the pump manual for instructions. * Air in the hydraulic system. Bleed the air from the system following the pump manual.
  • B
    berryjoshuaAug 29, 2025
    How to fix Hi-Force Power Tool that will not retract?
    • S
      stacey07Aug 29, 2025
      If your Hi-Force Power Tool isn't retracting, consider these possibilities: * Hose connections might be reversed. Ensure the advance coupler on the pump connects to the advance coupler on the tool, and the retract coupler on the pump connects to the retract coupler on the tool. * The retract hose may not be securely connected. Ensure it is properly connected. * A broken retract pin could be the issue. Replace the broken pin and/or spring.
  • N
    Nicholas MurraySep 1, 2025
    How to fix Hi-Force Power Tool if square drive will not turn?
    • N
      Nicole DukeSep 1, 2025
      If the square drive on your Hi-Force Power Tool isn't turning, the following could be the reasons: * Lubricant or dirt buildup in the ratchet and segment pawl teeth. Disassemble the ratchet and clean out any grease or dirt. * Worn or broken teeth on the ratchet or pawl segment. Replace any worn or damaged parts.
  • N
    nhughesSep 5, 2025
    Why Hi-Force Power Tool pump only reaches 80-90 bar in advance mode?
    • I
      Ian BarnesSep 5, 2025
      If your Hi-Force Power Tool pump only reaches 80-90 bar in advance mode but higher in retract mode, it might be due to incorrectly connected hoses. Try swapping the hose connections at the tool.
  • E
    Elizabeth OsborneSep 9, 2025
    Why Hi-Force Power Tool advances automatically?
    • G
      gbartonSep 9, 2025
      If your Hi-Force Power Tool advances automatically without pressing the pendant button, it might be due to incorrectly connected hoses. Try swapping the hose connections at the tool.

Summary

Safety Precautions

General Hydraulic System Safety

Critical safety warnings for hydraulic systems.

Hydraulic Torque Wrench Safety

Specific Safety Precautions

Safety rules specific to hydraulic torque wrenches.

Installation and Setup

Before Each Use Checks

Hydraulic Connections

Setting Direction of Rotation

Setting the Torque

Reaction Surfaces and Arm

Setting the Reaction Arm

Operation of the Wrench

Operating the Wrench

Step-by-step guide for operating the torque wrench.

Maintenance and Storage

Lubrication Procedure

Specifications

TWS-N Model Specifications

Torque Conversion Charts

Troubleshooting Guide

Hi-Force TWS45N Specifications

General IconGeneral
ModelTWS45N
TypeHydraulic Torque Wrench
Calibration CertificateYes
Accuracy+/- 3%
MaterialSteel

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