Table of Contents
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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.
OPERATING INSTRUCTION MANUAL
TWS-N SERIES | HYDRAULIC TORQUE WRENCHES
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.
Operating Instruction Manual:
OM-TWS-N-01
- SQUARE DRIVE
1
Serial Numbers:
All
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Table of Contents
Related Manuals for Hi-Force TWS-N Series
Summary of Contents for Hi-Force TWS-N Series
- Page 1 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.
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Page 2: Table Of Contents
Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 Table of Contents 1.0 Inspection upon Receipt ..............3 2.0 Safety Precautions ................3 3.0 Declaration of Incorporation / Conformity ........6 4.0 Component Identification ..............7 5.0 Installation / Setup ................8 6.0 Operation ..................14 7.0 Maintenance and Storage .............. -
Page 3: Inspection Upon Receipt
If in doubt on the correct use of any Hi-Force equipment, contact your nearest Hi-Force office or distributor. Only qualified personnel should be allowed to operate hydraulic equipment. If an operator has not been trained on high-pressure hydraulic equipment and its safe usage, consult your local Hi-Force sales office or distributor who can offer training courses for operators. - Page 4 NEVER attempt to solve, or clean-up leaks in the system while the system is pressurised. Immediately replace any worn or damaged parts using genuine Hi-Force parts only. DO NOT use any hydraulic equipment if you are under the influence of alcohol, drugs or medication.
- Page 5 NEVER exceed the maximum rated pressure of any hydraulic equipment. Hi-Force manufactures its TWS-N torque wrenches to operate at a maximum working pressure of 700 bar (10,000 psi). DO NOT connect a pump with a higher pressure capacity rating to any Hi-Force tool of this model series.
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Page 6: Declaration Of Incorporation / Conformity
To protect your warranty, only use the hydraulic oil grade specified in Section 8.1. 3.0 Declaration of Incorporation / Conformity Hi-Force declares that this product has been tested and complies with the standards set out in 2006/42/EC - The Machinery Directive. The Declaration of Incorporation/Conformity is included... -
Page 7: Component Identification
Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 4.0 Component Identification Male ‘Retract’ Coupler (90 bar) Drive Unit Female ‘Advance’ Coupler (700 bar) Square Drive (Reversible) Shroud Reaction Arm (Multi-Position) 360° Uni-Swivel Figure 4.1: Component Identification... -
Page 8: Installation / Setup
Make sure both coupler halves are clean before connecting. If you are NOT using a Hi-Force Torque Wrench pump, or if the pump or hoses have been modified, make sure that the wrench is connected correctly so that the female high-pressure advance coupler (2) is connected to the advance port on the pump. - Page 9 Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 5.2.1 Connections (See figure 5.1) Connections between couplers are made by simply [1] pressing the male coupler into the female coupler until [2] the locking collar springs forward and locks the couplers together. Make certain the spring-loaded retaining rings are fully engaged to prevent the connectors from disengaging under pressure.
- Page 10 Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 5.2.3. Connecting a Torque Wrench to the Pump Connect the female coupler on the red hose to the male advance coupler on the pump. Connect the male coupler on the black hose to the female retract coupler on the pump. Figure 5.3: Connecting to the Pump ...
- Page 11 Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 5.3 Setting the Direction of Rotation of the Square Drive The position of the Square Drive when looking toward the Shroud will determine if the tool is set to tighten or loosen the nut/bolt (See below). Looking at the front of the tool, with the reaction arm pointed away from you;...
- Page 12 Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 5.5 Reaction Surfaces The function of the reaction arm / surface is to hold the tool in position against the forces generated to tighten or loosen bolts or nuts. Hydraulic wrenches generate tremendous torque (rotational) forces. Figure 5.6: Reaction Surfaces 5.5.1 Setting the Reaction Arm Make sure the reaction arm is positioned correctly.
- Page 13 90° to the side of the torque wrench body. NOTE: The extended reaction arm is purchased separately as an accessory. For further information please contact your nearest Hi-Force office / distributor. Figure 5.8: Extended Reaction Arm Orientation & Reaction Surface 5.6 Bleeding Trapped Air from the System...
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Page 14: Operation
OM-TWS-N-01 6.0 Operation Hi-Force TWS-N Torque Wrenches require a suitable double-acting Hydraulic Torque Wrench pump for operation. Make sure you read this manual in conjunction with the Torque Wrench Pumps operating instruction manual to ensure correct and safe operation of all hydraulic equipment in the system. - Page 15 Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 1. Place the chosen socket on the squared drive shaft and insert the socket retainer ring and pin. 2. Place the socket on the nut / bolt to be tightened / loosened. (Make sure the square drive and socket are the correct size for the nut / bolt and that the socket fully engages it).
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Page 16: Maintenance And Storage
Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 7.0 Maintenance and Storage Carry out basic maintenance on a regular basis to keep the torque wrench operating in a trouble-free manner. Maintenance intervals are determined by the frequency of use and the operating conditions on site. -
Page 17: Specifications
8.1 Oil Specifications Hi-Force tools will use 1 of 2 grades of oil, dependant on the pump used. The tools are designed to operate at temperatures between -20°C and 80°C. Details of the oil used can be found in the chosen Hi-Force pump’s operating manual, in the section: FILLING OF PUMP WITH OIL. -
Page 18: System Components / Accessories
Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 9.0 System Components / Accessories (Refer to the Hi-Force website or latest Hi-Force catalogue, for further details) HTWH Series High-Pressure Hydraulic Hoses (Up to 100m). HTWR1 Torque Wrench Hose Reel High-Pressure Quick-Release Male and Female Half Couplers. -
Page 19: Tws-N Torque Conversion Charts
Operating Instruction Manual: Serial Numbers: OM-TWS-N-01... -
Page 20: Troubleshooting
Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 11.0 Troubleshooting Hi-Force TWS-N Square Drive Torque Wrenches should be serviced and repaired only by authorised Hi-Force repair centres. The following table gives possible causes and solutions for common problems. TROUBLESHOOTING GUIDE Problem Possible Cause Solution 1. - Page 21 Problem Possible Cause Solution 7. Erratic tool movement. a. Leakage from pump or valve Contact your local Hi-Force office / distributor. internal components. b. Internal leak, due to damaged/worn Contact your local Hi-Force office / distributor. seals or valves. c. Oil level too low.
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Page 22: Contact Details
Operating Instruction Manual: Serial Numbers: OM-TWS-N-01 UK Head Office: Hi-Force Limited Prospect Way, Daventry, Northamptonshire NN11 8PL United Kingdom Tel: + 44 1327 301000 Fax: + 44 1327 706555 Email: daventry@hi-force.com... - Page 23 Baku Milano Azerbaijan Italy Tel: +994 124 474 100 Tel: +39 0257 607 174 Email: baku@hi-force.com Email: italy@hi-force.com Hi-Force Hydraulics (Asia) S.B. Hi-Force Nederland B.V. Selangor Numansdorp Malaysia Netherlands Tel: +603 5525 4203 Tel: +31 85 902 8111 Email: malaysia@hi-force.com Email: holland@hi-force.com...