Grapple Rebuild

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Here is a job in progress.... I'm essentialy rebuiling a hydraulic grapple for an excavator that is used in a scrap yard. There are quite a few repairs that need to be made to this unit so I'll just post stuff in groups....First is the disassembly. You'll see that the lower pin keeper (pivot point for the tynes) is broken. they all need to be removed and replaced with new ones and the 8 bores need to be repaired.http://i147.photobucket.com/albums/r...ebuild/P01.jpghttp://i147.photobucket.com/albums/r...ebuild/P03.jpgAll the keeprs have been gouged off and all the areas have been cleaned.http://i147.photobucket.com/albums/r...ebuild/P04.jpgSecond, I need increase the clearance between the main pin ears at the top of the grapple by a 1/2" and the bores need to be opened up a 1/2' as well.  http://i147.photobucket.com/albums/r...ebuild/P05.jpgThe boss plates need to be removed from both sideshttp://i147.photobucket.com/albums/r...ebuild/P06.jpghttp://i147.photobucket.com/albums/r...ebuild/P07.jpghttp://i147.photobucket.com/albums/r...ebuild/P08.jpghttp://i147.photobucket.com/albums/r...ebuild/P10.jpgFab new boss plates, and weld them both in. The original boss plates were 3/4"  thick so I cut new ones from 1/2" plate.http://i147.photobucket.com/albums/r...ebuild/P11.jpghttp://i147.photobucket.com/albums/r...ebuild/P12.jpghttp://i147.photobucket.com/albums/r...ebuild/P13.jpghttp://i147.photobucket.com/albums/r...ebuild/P14.jpgNext is to repair the lower tyne bores.... I love my positioner http://i147.photobucket.com/albums/r...ebuild/P15.jpgYou can see how badly the bores are wornhttp://i147.photobucket.com/albums/r...ebuild/P17.jpgHere is a bore welded up ready to be reboredhttp://i147.photobucket.com/albums/r...ebuild/P18.jpgThis is where I'm at for now I'll continue to add pics as the job moves along.... I think tuesday I'll have this on the boring table. Then I get to rework all of the tynes.... lucky me, and Zap thought he got all the fun jobs._________________Chris
Reply:thats looks like a pretty big and interesting job lorenzo keep us posted Creative metal Creative metal Facebook
Reply:TOO big I LIKE IT!what did you used? 6010 for sure!3/4 is amazingly big!My Babies: HF Drill pressHF Pipe Bender3   4.5" Black and Decker angle grindersLincoln Electric PROMIG 175that´s it!
Reply:You get all the fun jobs... ...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:man i wish i still did stuff like that  nice workChuckASME Pressure Vessel welder
Reply:The boring is done.... at least for the lower bores. Still have to take the main pin bores from 3" to a 3-1/2"......  at the same time the broken keeper bolts were extracted and retapped.This it the bores beforehttp://i147.photobucket.com/albums/r...ebuild/P16.jpghttp://i147.photobucket.com/albums/r...ebuild/P17.jpgand this is now.... http://i147.photobucket.com/albums/r...ebuild/P20.jpghttp://i147.photobucket.com/albums/r...ebuild/P21.jpghttp://i147.photobucket.com/albums/r...ebuild/P22.jpghttp://i147.photobucket.com/albums/r...ebuild/P23.jpgI'll update as the job progresses.._________________Chris
Reply:WoW!! you have the same "schrader" hose ends that we do..i hate them...  ...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Originally Posted by zapsterWoW!! you have the same "schrader" hose ends that we do..i hate them...  ...zap!
Reply:Looks like a fun project, I miss that stuff.  I always like working on heavy stuff.DewayneDixieland WeldingMM350PLincoln 100Some torchesOther misc. tools
Reply:Very cool to see how you guys - lorenzo and ZAP re-work that stuff. As always, thanks for sharing.John -  fabricator extraordinaire, car nut!-  bleeding Miller blue! http://www.weldfabzone.com
Reply:Ok it's done..... New bushing for the tynes... When doing bushings that have a seal I'll quickly machine a bushing driver that will set the bushing to the correct depth with the seal in mind. For the tyne I pulled both bushing in at the same time... http://i147.photobucket.com/albums/r...ebuild/P43.jpghttp://i147.photobucket.com/albums/r...ebuild/P39.jpghttp://i147.photobucket.com/albums/r...ebuild/P40.jpghttp://i147.photobucket.com/albums/r...ebuild/P41.jpghttp://i147.photobucket.com/albums/r...ebuild/P42.jpgTime for some new tips on the tynes... these tips are not for this grapple so I had to modify them a bit...http://i147.photobucket.com/albums/r...ebuild/P47.jpghttp://i147.photobucket.com/albums/r...ebuild/P48.jpghttp://i147.photobucket.com/albums/r...ebuild/P49.jpgBevel the tips and weld them in...http://i147.photobucket.com/albums/r...ebuild/P50.jpghttp://i147.photobucket.com/albums/r...ebuild/P52.jpghttp://i147.photobucket.com/albums/r...ebuild/P53.jpghttp://i147.photobucket.com/albums/r...ebuild/P54.jpghttp://i147.photobucket.com/albums/r...ebuild/P57.jpghttp://i147.photobucket.com/albums/r...ebuild/P56.jpgThe main pin bore finished... http://i147.photobucket.com/albums/r...ebuild/P32.jpghttp://i147.photobucket.com/albums/r...ebuild/P44.jpgFinally assembled... I used some 1.5 x 1.5 sq tube to weld the unit in the fixed open position for trasnportation....http://i147.photobucket.com/albums/r...ebuild/P59.jpghttp://i147.photobucket.com/albums/r...ebuild/P58.jpghttp://i147.photobucket.com/albums/r...ebuild/P60.jpgNow I have 2 more to do  .... lucky me!_________________Chris
Reply:Lorenzo,I have been keeping up with the progress. Job well done!How many man hours did you spend  on this grapple re-build?Tom
Reply:Excellent post, excellent work.  I enjoy these types of posts. All I need to do is look and learn. Very informational. The techniques can be applied to any sized projects. Keep them coming.
Reply:Lorenzo you the Bomb!