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TNH Thumb
BT
SERIES
Installation Manual
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.
72 Montgomery Crescent
Upper Hutt 5018, New Zealand
ph: +64 4 526 3901
www.wedgelock.com
Parts & Service 01/12/2016
902-001-13 Rev 3
Page 1
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Related Manuals for WEDGELOCK TNH BT Series
Summary of Contents for WEDGELOCK TNH BT Series
- Page 1 Installation Manual 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. 72 Montgomery Crescent...
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Page 2: Table Of Contents
CONTENTS Contents CONTENTS ................2 IMPORTANT NOTICES . -
Page 3: Important Notices
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. -
Page 4: Section 1: Components And Terminology
SECTION 1: Components and Terminology DIPPER ARM or STICK CYLINDER BRACKET HYDRAULIC CONNECTIONS CYLINDER STOP BRACKET THUMB STORAGE LUGS SPACERS CYLINDER ROD THUMB MAIN PIN BOLTED END CAP PIN RETAINER THUMB BODY COUPLER EAR PLATE THUMB PIN THUMB SIDE PLATE THUMB STORAGE LUGS TOOTH BAR THUMB PIN CONFIGURATION... -
Page 5: Section 2: Safety Precautions
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. -
Page 6: Safety During Thumb Installation
SECTION 2: Safety Precautions DO NOT PASS CURRENT THROUGH THE CYLINDER. CONNECT EARTH LEAD TO BRACKET OR ARM, NOT THE CYLINDER OR THUMB BODY 2.2 SAFETY DURING THUMB INSTALLATION • Use appropriate PPE (Personal Protective Equipment) when carrying out any welding procedures. •... -
Page 7: Section 3: Thumb Installation
SECTION 3: Thumb Installation 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 •... -
Page 8: Step 3: Extend Cylinder Rod
SECTION 3: Thumb Installation 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. -
Page 9: Step 5: Attach Brackets To Cylinder
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 COUPLER EAR PLATE DIPPER ARM... - Page 10 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. SPACERS SPACERS 3mm SHIM...
- Page 11 SECTION 3: Thumb Installation THUMB PIN ENSURE THERE IS A GAP BETWEEN THE END CAP AND THE THUMB SIDE PLATE END CAP THUMB SIDE PLATE • If there is no gap when the end cap is bolted on tight, turn the end cap around. NO GAP Parts &...
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Page 12: Step 7: Turn Thumb Over
SECTION 3: Thumb Installation STEP 7: TURN THUMB OVER 30MM – 100MM • Extend arm forward, dragging tooth bar across the ground, until the thumb bracket almost touches the dipper arm. A 30mm to 100mm separation is ideal. DO NOT contact arm with thumb bracket or damage may occur. •... -
Page 13: Step 8: Tack Weld Brackets To Arm
SECTION 3: Thumb Installation STEP 8: TACK WELD BRACKETS TO ARM • Position the cylinder bracket in the centre of the dipper arm or inline with the cylinder. BEFORE WELDING, DISCONNECT 50mm THE GROUND TERMINAL FROM THE MACHINE’S BATTERY. FOLLOW ANY OTHER INSTRUCTIONS IN THE MACHINE SERVICE MANUAL RELATED TO WELDING. -
Page 14: Step 9: Install And Test Hydraulics
1. The thumb has not been centred properly on the coupler (Repeat STEP 6 for remedy) 2. The bucket differs from the one used as specification for the thumb manufacture (Use correct bucket for remedy) 3. The measurements supplied for thumb manufacture were incorrect. (Contact Wedgelock.) Page 14 902-001-13 Rev 3 Parts &... -
Page 15: Step 11: Complete The Welding Process
SECTION 3: Thumb Installation STEP 11: COMPLETE THE WELDING PROCESS • Remove the bucket. • AGAIN, BEFORE WELDING DISCONNECT THE GROUND TERMINAL FROM THE MACHINE’S BATTERY. • Remove cylinder from cylinder bracket. • Position arm, coupler and thumb as shown above. •... -
Page 16: Step 12: Install Retainer Pin
SECTION 3: Thumb Installation STEP 12: INSTALL RETAINER PIN • Position the coupler to full dump and the thumb to the stored position (as shown right). • Using the hole in the main pin, line up the retainer bar with the lower portion of the coupler ear plate. Make sure the retainer bar will not contact the thumb side plate and then tack the pin to the coupler. -
Page 17: Section 4: Tables
Check the thumb for evidence of fatigue, weld failure ü or stress – if evident contact your Wedgelock dealer immediately for assistance. Check thumb alignment with bucket teeth. Should ü alignment have changed, new shims may be required. -
Page 18: Section 5: Weld On Grease Port
SECTION 5: Weld On Grease Port 5.1 INSTALLING GREASE PORT TO BE FITTED TO EXCAVATORS WHERE THUMB MAIN PIN REPLACES A PIN THAT IS GREASED THROUGH THE PIN DISCONNECT THE BATTERY BEFORE WELDING • Find a suitable location for the grease port; •... -
Page 19: Section 6: Mis-Use Of Attachment
SECTION 6: Mis-use of attachment 6.1 PRESSURE ON BACK OF THUMB • Do not put excessive pressure on the back of the thumb (back-blading). • The thumb is designed to receive stress in one direction only and excessive stress on the back of the thumb will cause damage and possible failure that is not covered under the manufacturer’s warranty.