WEDGELOCK TNH BT Series User manual

Parts & Service 01/12/2016 902-001-13 Rev 3 Page 1
SPECIAL NOTE
Your new Wedgelock TNH Thumb may have been manufactured to supplied specifications for a target carrier
machine. Installation on any machine other than the target carrier may not be possible and will void warranty.
TNH Thumb
Installation Manual
BT
SERIES
72 Montgomery Crescent
Upper Hutt 5018, New Zealand
ph: [phone]
www.wedgelock.com

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CONTENTS
Contents
CONTENTS............................................................................2
IMPORTANT NOTICES ...................................................................3
SECTION 1: COMPONENTS AND TERMINOLOGY ..............................................4
SECTION 2: SAFETY PRECAUTIONS ........................................................5
2.0 SAFETY PRECAUTIONS ..................................................5
2.1 WELDING PRECAUTIONS .................................................5
2.2 SAFETY DURING THUMB INSTALLATION......................................6
SECTION 3: THUMB INSTALLATION ........................................................7
STEP 1: POSITION CARRIER MACHINE ..........................................7
STEP 2: REMOVE BUCKET ...................................................7
STEP 3: EXTEND CYLINDER ROD ..............................................8
STEP 4: PIN CYLINDER TO THUMB BODY ........................................8
STEP 5: ATTACH BRACKETS TO CYLINDER .......................................9
STEP 6: INSTALL THUMB MAIN PIN ............................................9
STEP 7: TURN THUMB OVER ................................................12
STEP 8: TACK WELD BRACKETS TO ARM .......................................13
STEP 9: INSTALL AND TEST HYDRAULICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
STEP 10: TEST THUMB ROTATION ............................................14
STEP 11: COMPLETE THE WELDING PROCESS...................................15
STEP 12: INSTALL RETAINER PIN .............................................16
STEP 13: FINISHING.......................................................16
SECTION 4: TABLES ...................................................................17
4.1 TABLE OF SETTINGS ...................................................17
4.2 MAINTENANCE SCHEDULE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SECTION 5: WELD ON GREASE PORT......................................................18
5.1 INSTALLING GREASE PORT ..............................................18
SECTION 6: MIS-USE OF ATTACHMENT ....................................................19
6.1 PRESSURE ON BACK OF THUMB ..........................................19

Parts & Service 01/12/2016 902-001-13 Rev 3 Page 3
IMPORTANT NOTICES
IMPORTANT NOTICES
Wedgelock TNH thumbs are manufactured for a specific carrier machine.
Measurements and tolerances are designed to fit that machine and will not
necessarily fit any other brand, model or weight class.
The thumb has been manufactured using critical measurements supplied by
the purchaser or end user. While there is a small margin for error, larger errors
or ommissions can cause the thumb’s operation to be less than optimal.
STEP 9 is a final check/review that will determine the accuracy of the supplied
measurements. It is vital that this step be carried out correctly, and if over-
rotation occurs, the subsequent instructions are followed.
The installation of a major attachment like a thumb is best carried out in a
secure workshop environment with safe lifting devices and specialist tools.
Occasionally, however, this is not possible, and these instructions contain
suggestions and tips on how to carry out an installation in the field. Unless
otherwise noted, these procedural instructions are suggestions only, and
Wedgelock will not be held responsible for any adverse consequences of a field
installation that does not return optimal results.
It is expected that installation of Wedgelock thumbs be carried out by
professionals whose experience will ensure the operation is carried out to a
successful result. If, during the installation process, the installer has any doubts
or questions, please contact Wedgelock BEFORE engaging in a potentially
damaging or dangerous process
ALWAYS disconnect the battery circuit before undertaking any welding.
Be very careful where you place the earth strap when welding. DO NOT pass
current through the cylinder. Earth to the dipper arm or bracket, NOT the thumb
or cylinder.

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DIPPER ARM or STICK
CYLINDER BRACKET
THUMB BODY
CYLINDER
HYDRAULIC CONNECTIONS
THUMB PIN
STOP BRACKET
THUMB STORAGE LUGS
THUMB STORAGE LUGS
TOOTH BAR
THUMB PIN CONFIGURATION
CYLINDER ROD
BOLTED END CAP
THUMB MAIN PIN
PIN RETAINER
PIN RETAINER
PIN RETAINER BAR
COUPLER EAR PLATE
THUMB SIDE PLATE
SPACERS
END CAP
BOLTS
SECTION 1: Components and Terminology

Parts & Service 01/12/2016 902-001-13 Rev 3 Page 5
SECTION 2: Safety Precautions
2.0 SAFETY PRECAUTIONS
• Always use PPE (Personal Protective Equipment) when servicing, operating or maintaining plant, machinery and its
components.
• Refer to the carrier machine “Service Manual” for correct procedures when carrying out work on the machine. The
machine service manual takes precedence over any discrepancies between that and this installation manual.
• Allow for hydraulic oil to cool adequately before opening or accessing any hydraulic lines. Hydraulic lines, fittings
and components can be hot which can be harmful causing severe burns.
• Relieve the hydraulic tank pressure before accessing hydraulic lines. Refer to the carrier machine service manual
for proper procedures.
• Unless otherwise noted in these instructions, ensure that the dipper arm of the carrier machine is resting on the
ground at all times – do not leave attachments suspended in the air during service / installation.
• Visually inspect for oil leaks tighten and adjust accordingly. Avoid contact with hydraulic fluids and high pressure
oils – use cardboard or similar as a backing when checking for leaks.
• Oil spills are sometimes unavoidable. Contain all fluid spills with appropriate absorbent materials and dispose
accordingly. Immediately clean affected areas to minimize safety risks.
• When operating plant and machinery keep people and property well out of harms way. Evaluate the working
environment and identify hazards. Ensure that all people involved in the installation understand the hazards
associated with this procedure.
2.1 WELDING PRECAUTIONS
• Before commencing any welding procedures on the carrier machine ensure that the engine is turned off and the
battery supply is disconnected (refer to the carrier machine service manual)
• Ensure all surrounding areas are protected with a flame resistant covering. Clear surrounding areas of combustible
materials. Ensure you have a fire extinguisher at hand.
• Cover highly susceptible surfaces like cylinder rods, glass windows, electrical components and plastics to prevent
spatter or heat damage.
• Ensure parts and surfaces to be welded are clean and prepared properly for welding. Remove all paint from the
surfaces to be welded.
• Connect the ground cable (earth lead) from the welder to the component to be welded to the carrier machine (SEE
NEXT PAGE).

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2.2 SAFETY DURING THUMB INSTALLATION
• Use appropriate PPE (Personal Protective Equipment) when carrying out any welding procedures.
• Always use the correct PPE when removing attachments from carrier machines.
• Stand well clear of machinery that is in motion at all times.
• NEVER place hands or fingers near pin holes or recesses.
• Always use correct tools when carrying out removal and installation of attachments on the carrier machine.
• Use correct lifting techniques and lifting equipment when maneuvering heavy objects
• Attachments may roll or tip during removal when placed on the ground – place with extreme caution
• Always use assistance when installing and removing attachments pinned to the carrier machine
• If installing in the field, ensure the surface is flat, clean and large enough for the operation to take place
NOTE
The steps in this manual that deal with the maneuvering of the thumb without a crane or hoist
are suggestions only. Experienced installers may have developed their own system.
SECTION 2: Safety Precautions
DO NOT PASS CURRENT THROUGH THE CYLINDER. CONNECT
EARTH LEAD TO BRACKET OR ARM, NOT THE CYLINDER OR
THUMB BODY

Parts & Service 01/12/2016 902-001-13 Rev 3 Page 7
BEFORE YOU BEGIN – Weld On Grease Port
If the excavator has a main pin that is greased through the pin, a
grease port must be installed. See Section 5, Page 18
STEP 1: POSITION CARRIER MACHINE
• Ensure that the Thumb is in line with the centre of the dipper arm.
• Position the thumb with teeth nearest the cab and lined up roughly with the boom pin.
• Ensure that the machine and the thumb are on level ground. This is critical for alignment of the thumb pin.
STEP 2: REMOVE BUCKET
• Remove the bucket from the carrier machine.
SECTION 3: Thumb Installation

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STEP 3: EXTEND CYLINDER ROD
• Extend the cyclinder rod 10mm (3/8”) from the fully retracted position. THIS MUST BE DONE, otherwise the cylinder
may be damaged because of over-rotation interferences.
• For most weight classes 10mm is enough, but the larger sizes require a greater distance. Refer to the table on
Page 17 for the correct distance.
STEP 4: PIN CYLINDER TO THUMB BODY
• Pin the cylinder to the thumb body while the thumb is lying flat on the ground.
• Use spacers (supplied) to ensure cylinder is centred on the thumb body.
10mm
FLOATING COLLAR & BOLT
SPACERS
SECTION 3: Thumb Installation

Parts & Service 01/12/2016 902-001-13 Rev 3 Page 9
SECTION 3: Thumb Installation
STEP 5: ATTACH BRACKETS TO CYLINDER
• Pin the cylinder bracket to the base end of the cylinder.
• Hang the stop bracket on the thumb storage lugs using
shackles provided.
STEP 6: INSTALL THUMB MAIN PIN
THUMB
COUPLER
DIPPER ARM
X X
EAR PLATE
EAR PLATE
THUMB PIN
CENTRELINE
3mm SHIM
ORIGINAL PIN

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SECTION 3: Thumb Installation
• Position the front pin of the coupler between the side plates of the thumb. Line the original pin up with the thumb
pin holes.
• Measure equal distances from the coupler ear plates and the thumb. Centre the thumb.
• Select spacers from the ones supplied to fill the gaps.
• Make sure you use a 3mm shim under the retainer.
• Use the thumb pin to push the original pin through.
• Bolt on the thumb pin end cap.
SPACERSSPACERS
THUMB PIN ORIGINAL PIN
3mm SHIM
END CAP
RETAINER
RETAINER PIN
3mm SHIM