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Hi-Force TWS-N Series, Operating Instructions Manual

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Hi-Force TWS-N Series Operating Instructions Manual Download Page 20

Operating Instruction Manual: 

OM-TWS-N-01 

Serial Numbers: 

All 

 

20 

 

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. Piston will not advance 

or retract. 

a. Couplers not securely attached to 

the tool or pump. 

Check the coupler connections and make 
sure they are connected correctly and fully 
engaged. 

b. Defective coupler. 

Replace defective coupler. 

c. Faulty control pendant. 

Contact your local Hi-Force office / distributor. 

d. Pump malfunction. 

See pump manual or contact your local  
Hi-Force office / distributor. 

e. Oil level too low. 

See pump manual. 

2. Tool will not retract. 

a. Hose connections reversed. 

Make sure the advance coupler on the pump 
is connected to the advance coupler on the 
tool and that the retract coupler on the pump 
is connected to the retract coupler on the tool. 

b. Retract hose not connected. 

Connect the retract hose securely. 

c. Retract pin broken. 

Replace the broken pin and/or spring. 

3. Tool will not build / hold 

pressure. 

a. Piston seal and/or end plug seal 

leaking. 

Replace defective seals. 

b. Defective coupler. 

Replace defective coupler. 

4. Square drive will not 

turn. 

a. Lubricant or dirt build-up in the 

teeth of the ratchet and segment 
pawl. 

Disassemble the ratchet and clean the grease 
or dirt out of the teeth. 

b. Worn or broken teeth on the 

ratchet and/or pawl segment. 

Replace worn or damaged parts. 

5. Tool advances 

automatically, without 
a pendant button being 
pressed. 

a. Tool Incorrectly connected. 

Swap Hose connections at the tool. 

6. Pump will only reach 

80-90 bar in advance 
mode, but higher in 
retract mode. 

a. Tool Incorrectly connected. 

Swap Hose connections at the tool. 

 

 

 

Summary of Contents for TWS-N Series

Page 1: ... 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 o...

Page 2: ... Incorporation Conformity 6 4 0 Component Identification 7 5 0 Installation Setup 8 6 0 Operation 14 7 0 Maintenance and Storage 16 8 0 Specifications 17 9 0 System Components Accessories 18 10 0 TWS N Torque Conversion Charts 19 11 0 Troubleshooting 20 12 0 Contact Details 22 NOTE Images contained within this document are for illustrative purposes ONLY ...

Page 3: ...ate 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 2 2 Work Area Safety Keep work areas clean and well lit Cluttered spaces and inadequate lighting can result in unnecessary accidents Keep bystanders clear of any hydraulic tool activi...

Page 4: ...slodge unexpectedly with great force This action could result in serious personal injury or death Loosening a coupler under pressure can result in the escape of hydraulic oil at high pressure which can penetrate the skin and cause significant injury or death NEVER use a hammer and punch to unseat a coupler check valve that is under pressure Doing so could result in the sudden uncontrolled release ...

Page 5: ...ipment 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 NEVER attempt to connect or disconnect hydraulic equipment while the system is under pressure DO NOT weld any items to the torque wrench or modify it in any way from its delivered...

Page 6: ... impact sockets and accessories DO NOT use hand chrome sockets or accessories ONLY use Hi Force recommended accessories ONLY use sockets and accessories that correctly fit the nut bolt and function without tilting the tool off the axis of the bolt DO NOT interchange the male and female swivel inlets on the tool or the connections on one end of the hose Reversing the inlets will reverse the power s...

Page 7: ...Serial Numbers All 7 4 0 Component Identification 1 Drive Unit 5 Male Retract Coupler 90 bar 2 Square Drive Reversible 6 Female Advance Coupler 700 bar 3 Shroud 7 Reaction Arm Multi Position 4 360 Uni Swivel Figure 4 1 Component Identification ...

Page 8: ...nected to the pump via both the advance and retract couplers DO NOT pressurise the pump system if there are any disconnected couplers in the system ALWAYS use Hi Force HTWH hoses to make connections Hi Force TWS N torque wrenches are fitted with dual flat face quick connect couplers Make sure both coupler halves are clean before connecting If you are NOT using a Hi Force Torque Wrench pump or if t...

Page 9: ...er pressure A gentle tug on the hose should be enough to make sure the hose is correctly connected 5 2 2 Disconnections See figure 5 2 Always make sure the pump is switched off and pressure has been fully released before disconnections are made To disconnect couplers 1 1 twist the locking collar on the female coupler in the direction of arrow and 1 2 pull back toward the female coupler body 2 With...

Page 10: ... the male advance coupler on the pump Connect the male coupler on the black hose to the female retract coupler on the pump Connect the free end of the red hose to the advance port on the torque wrench Connect the free end of the black hose to the retract port on the torque wrench Figure 5 4 Connecting the Torque Wrench Figure 5 3 Connecting to the Pump ...

Page 11: ...me time pull the square drive out of the housing Release the push button on the retaining plate and allow the retaining plate to drop out of the tool body into your hand Insert the square drive into the cavity on the opposite side of the tool body where the retaining plate was previously Secure the square drive by installing the push button release retaining plate onto the end of the drive 5 4 Set...

Page 12: ...s positioned correctly See Figure 5 7 The reaction arm can be positioned in numerous positions within a 360 circle However for the arm to be correctly positioned it MUST be set within a 90 quadrant of that circle That quadrant is the area located between the protruding square drive and the bottom of the housing away from the swivel inlets It will always be toward the lower half of the housing and ...

Page 13: ... place correctly The problem is very simply cured and in many cases will rectify itself before the operator is even aware it has occurred To return the plug to its correct position simply connect the tool to a pump and cycle the mechanism backwards and forwards a couple of times In a lot of cases just switching the pump on will be enough The reaction arm should then latch on correctly 5 5 2 Extend...

Page 14: ...ce and procedure You have performed the relevant risk assessment s and have a method statement safe system of work for all operators to follow 6 1 Operating the Wrench Hi force recommends that operation of the pump wrench combination be a minimum 2 person job one to operate the pump and one to operate the wrench An additional operator will be required for each addition wrench connected to the pump...

Page 15: ...urfaces 4 After turning on the pump and pre setting the pressure for the correct torque signal the pump operator to depress the advance button on the control pendant and advance the piston assembly See pump manual When started the reaction surface of the wrench or reaction arm will move against the contact point and the nut will begin to turn Once the piston reaches the end of its stroke the press...

Page 16: ...tion Lubricant Molybdenum Disulphide Grease Marine Grade Moly Lube is formulated not to wash out of the tool in areas where lubrication is critical Lubrication frequency is dependent on factors known only to the tool user Whenever lubrication is required lubricate as follows 1 Remove the Drive Plate Ratchet Segment Pawl and Drive Sleeves and wash the components in a suitable cleaning solution in a...

Page 17: ...al in the section FILLING OF PUMP WITH OIL Hi Force Model Number ISO Hydraulic Oil Grade Temperature Range Degrees Celcius C From To HFO15 ISO15 23 44 HFO46 ISO46 2 73 8 1 TWS N Specifications Refer to the engraved detail on the torque wrench body for model identification TWS N Square Drive Hydraulic Torque Wrenches Model Number Torque Capacity Square Drive Size Weight kg Nm at 700 bar lbf ft at 1...

Page 18: ...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 Metric Imperial Hexagon AF Size Heavy Duty Sockets Metric Imperial Allen Hex Drives Extended Reaction Arms See below Removable Handle Kits ...

Page 19: ...Operating Instruction Manual OM TWS N 01 Serial Numbers All 19 10 0 TWS N Torque Conversion Charts ...

Page 20: ...ons reversed Make sure the advance coupler on the pump is connected to the advance coupler on the tool and that the retract coupler on the pump is connected to the retract coupler on the tool b Retract hose not connected Connect the retract hose securely c Retract pin broken Replace the broken pin and or spring 3 Tool will not build hold pressure a Piston seal and or end plug seal leaking Replace ...

Page 21: ...e hydraulic system Bleed air from the system See pump manual e Tool piston binding Contact your local Hi Force office distributor 8 Tool stalls under load or before maximum torque is reached a Control Valve damaged Contact your local Hi Force office distributor b Seal damage wear or internal damage Contact your local Hi Force office distributor 9 Noisy Operation a Air trapped in the hydraulic syst...

Page 22: ...nstruction Manual OM TWS N 01 Serial Numbers All 22 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: ...malaysia hi force com Hi Force Nederland B V Numansdorp Netherlands Tel 31 85 902 8111 Email holland hi force com Hi Force Saudi Dammam Saudi Arabia Tel 966 13 802 1338 Email saudi hi force com Hi Force Hydraulics Abu Dhabi United Arab Emirates Tel 9712 551 3100 Email abu dhabi hi force com Hi Force FZE Dubai United Arab Emirates Tel 9714 8150 600 Email dubai hi force com Hi Force Jebel Ali Dubai ...

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