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Hytorc Stealth 4 - User Manual

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Stealth hydraulic limited-clearance wrench
Technical manual

Table of Contents

Questions and Answers

  • S
    Suzanne RhodesAug 18, 2025
    Why does the pressure in my Hytorc Power Tool system not increase?
    • K
      Kayla KaufmanAug 19, 2025
      The pressure in the system might not increase due to several reasons. There could be oil leakage because of a defective piston, piston seal, or O-ring, in which case you should replace the defective part. Alternatively, there might be leakage in the pressure relief valve or the two oil line connections; try tightening the leaking connection using a 9/16” open-end wrench. A worn motor coupling, indicated by the pump making sounds like pebbles in a tin can, can also cause this issue, requiring replacement of the motor coupling. Another cause might be the air shut-off valve failing due to excessive moisture or dirt in the air supply, which can be resolved by cleaning the air shut-off valve and the air lines. Lastly, the valve in the remote control might have failed and needs replacement.
  • N
    Nicholas FrostAug 21, 2025
    What to do if my Hytorc Stealth 4 motor does not operate?
    • Z
      zcervantesAug 21, 2025
      If the motor does not operate, the most likely reason is that there is no power supply. Check the power supply to resolve this issue.
  • J
    Jamie WilliamsAug 23, 2025
    What to do if my Hytorc Stealth 4 leaks externally?
    • A
      Amy DouglasAug 23, 2025
      External leaks can occur if blind plugs or end caps are worn, damaged, or not secured; in this case, replace the blind plugs or end caps. Also, a defective O-ring or gland seal in the piston can cause leaks, requiring replacement of the defective part.
  • M
    michaelspencerAug 26, 2025
    Why is my Hytorc Stealth 4 Power Tool moving slower than usual?
    • C
      Colin WalkerAug 26, 2025
      If your tool is moving slower than usual, it could be due to a leakage in the system. To check, adjust the pump pressure to 700 bar (10,000 psi), switch off the pump unit while holding the start button. The pump pressure must decrease to 100 bar (1,450 psi). If the pump pressure decreases to 0 bar (0 psi), contact your local HYTORC representative.
  • A
    Angela BrownAug 28, 2025
    What to do if my Hytorc Power Tool piston does not retract?
    • C
      Cheryl ParkAug 28, 2025
      If the piston does not retract, it could be due to hose couplings on the tool and the pump unit not being secured properly. Ensure you securely tighten the female coupling to the male coupling. Another reason could be damage to the linkage between the piston and the drive arms, which would require replacing the defective part.
  • D
    Deanna CampbellAug 30, 2025
    Why does my Hytorc Power Tool operate backwards?
    • C
      Charles SparksAug 30, 2025
      If the tool operates backwards, it may be because an even number of hoses has been connected. Connect an odd number of hoses. Another possible cause is interchanged male and female couplings. Use a HYTORC twin hose to correct this.
  • C
    Cole HigginsSep 1, 2025
    Why does my Hytorc Stealth 4 Power Tool motor make strange noises and not provide pressure (400V pump units only)?
    • C
      cherylbryanSep 2, 2025
      If the motor makes strange noises and does not provide pressure, it may be due to an incorrect direction of rotation. Change the direction of rotation.
  • W
    wernerdavidSep 4, 2025
    What to do if my Hytorc Stealth 4 Power Tool motor does not accelerate and stops after starting?
    • K
      Kathy PatelSep 4, 2025
      If the motor does not accelerate and stops after starting, there may be a drop in voltage due to an extension cable that is too thin or too long. Check the pump unit with the mains plug directly in the wall socket, without using an extension cable.
  • A
    Andrea SmithSep 6, 2025
    Why doesn't the pump of my Hytorc Stealth 4 Power Tool build pressure?
    • K
      Kathryn HodgesSep 6, 2025
      If the pump does not build pressure, the air supply may be too low. When the pump operates, ensure that the air pressure is at least 4 bar.
  • K
    Kimberly JimenezSep 8, 2025
    What to do if my Hytorc Stealth 4 ratchet returns with a stroke?
    • S
      Stephen ParkSep 8, 2025
      If the ratchet returns with a stroke, the square drive may be defective. Replace the defective part.

Summary

Safety

General safety instructions

Outlines fundamental safety rules for personnel, work area, and equipment.

Equipment

Safety precautions and guidelines for using the equipment and its components.

Additional safety instructions

Specific safety advice for pump units, hoses, arms, and sockets.

Qualified personnel

Defines the requirements and responsibilities for operating personnel.

Description

Electric pump unit

Details the electric pump unit, its pressure range, and components.

Pneumatic pump unit

Details the pneumatic pump unit, its pressure range, and components.

Hydraulic limited-clearance wrench

Describes the main tool, its features, and connection points.

Installation

Hydraulic hoses

Information on hydraulic hose specifications and usage.

Power supply (electric pump units)

Instructions for connecting power to electric pump units.

Air supply (pneumatic pump units)

Guidance on connecting air supply to pneumatic pump units.

Operation

Inspections before use

Checklist of critical items to verify before operating the equipment.

Torque

Section covering torque application and settings.

Setting the torque

Procedure for accurately setting the desired torque.

Tightening and loosening a bolted flange connection

General procedure for flange connection operations.

Tightening a bolted flange connection

Specific steps for tightening bolted flange connections.

Loosening a bolted flange connection

Specific steps for loosening bolted flange connections.

Maintenance

Troubleshooting

Tools

Common problems and solutions related to the tool's operation.

Pump units

Troubleshooting common issues with pump units.

Technical data

Hytorc Stealth 4 Specifications

General IconGeneral
BrandHytorc
ModelStealth 4
CategoryPower Tool
LanguageEnglish

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