Once again this is a seemingly easy install for those that know how to weld however if your uncertain of your welding ability we suggest giving your local on site welder a call. We always like to advise our customers to properly test the new hydraulic thumb attachment to ensure that it is functioning properly. FINISH WELDING MOUNTING PLATES TO BOOM USING 70-18 ELECTRODE. MOVE THUMB TO MINIMUM AND MAXIMUM CYLINDER STROKE, CHECK THAT CYLINDER IS FREE AND THAT THERE IS NO CONTACT THAT COULD DAMAGE CYLINDER.Ĭ. ( TACK WELD SHOULD HOLD MOUNT PLATE, THUMB AND CYLINDER)ī. INSTALL CYLINDER (TOP) MOUNTING PLATE TO A COMFORTABLE WORKING POSITION AND TACK WELD IN PLACE. STEP 2 – Install Cylinder Top Mount PlateĪ. WHEN THUMB CONTACTS BUCKET IN ANOTHER AREA MOUNTING PLATE IS TO BE MOVED BACK ON STICK TO REMOVE CONTACT AREA. THE BUCKET MUST ONLY CONTACT THE THUMB IN THIS AREA.
( THUMB MOST CONTACT BUCKET CUTTING EDGE OR TEETH). POSITION THE THUMB 90 DEGREES TO THE FLAT PART OF THE STICK AS SHOWN IN FIGURE D2. CHECK MOUNTING PLATE AND THUMB POSITION AS SHOWN IN F1.Į. INSTALL THE THUMB TO THE MOUNTING PLATEĭ. (MAKE SURE THE TACK WELD OR CLAMP IS STRONG ENOUGH TO HOLD THE MOUNTING PLATE AND THUMB IN PLACE.)Ĭ. CLAMP OR TACK WELD THE MOUNTING PLATE IN PLACE. (ALLOW 1” INCH CLEARANCE BETWEEN THE MOUNTING PLATE AND THE BUCKET.)ī. POSITION THE BUCKET IN FULL CURL AND LOCATE THE MOUNTING PLATE AS SHOWN IN F2. STEP 1 – Install Bottom Mount Plate To Mini ExcavatorĪ. Pick up, precisely place, and securely clamp materials with the Pin Mounted Thumb, offering smooth rotation of up to 120° for both the thumb and bucket. Many of our customers at have found that our instructions are easy but just incase you need something to look at we have provided the directions and a diagram for installing your hydraulic thumb to your mini excavator or backhoe arm. Installing a thumb when done correctly can take no time at all. Hydraulic Thumb Attachment Installation Instructions