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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
1997 753 Bobcat Bob-tach Problem
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<blockquote data-quote="Tazza" data-source="post: 3179" data-attributes="member: 82"><p>Hey there Joe.</p><p>Ok, here is how the pins work.</p><p>The lift arms have a tapered hole machined into them that a matching taper on the pins fit into to lock them in place. The pins have a tapped hole in the middle that a bolt goes through to pull the pin sung into the taper on the arm. If its not tight enough the taper will not hold and will spin and it will eventually un-do.</p><p>Now for the secret of removing them. Have a look at the bobtach, where the pin goes through. You should see a grease nipple at the opposite end, in-line to where the bolt is. Remove this grease nipple. You will need to do both sides to get access to the pins as you will need to drop the bobtach down to get to them. With the grease nipples out, use a long punch or a long metal bar to go through where the bolts used to be to lock the pins in and knock them into the bobtach. Grease will be pushed out of where the grease nipples used to be. Do this on both sides and the bobtach should just fall down, be sure to put a piece of timber under it as they are quite heavy. Just let it drop a few inches you don't want to damage your tilt cylinder.</p><p>While its off, you can replace the bushing in the bobtach and install new pins. You may need to run a small bead of weld on the bobtach bushing to get it out but deal with that if you need to. To re-install the pins, insert them into the bobtach first then pift into position (2 people make this ALOT easier) then using a long punch or metal rod knock the pins in place through the grease nipple hole. If you pump it up with grease, this will also help as the hydraulic effect will push the pin outwards and into the lift arm. Tighten the bolts up nice and snug and it should be all good!</p><p>If anything is un-clear just let me know. I'm assuming they haven't changed the basic design of later machines to my 743 but its essentially the same. The grease nipple may be in a different location.</p><p>Any problems just yell. Good luck!</p></blockquote><p></p>
[QUOTE="Tazza, post: 3179, member: 82"] Hey there Joe. Ok, here is how the pins work. The lift arms have a tapered hole machined into them that a matching taper on the pins fit into to lock them in place. The pins have a tapped hole in the middle that a bolt goes through to pull the pin sung into the taper on the arm. If its not tight enough the taper will not hold and will spin and it will eventually un-do. Now for the secret of removing them. Have a look at the bobtach, where the pin goes through. You should see a grease nipple at the opposite end, in-line to where the bolt is. Remove this grease nipple. You will need to do both sides to get access to the pins as you will need to drop the bobtach down to get to them. With the grease nipples out, use a long punch or a long metal bar to go through where the bolts used to be to lock the pins in and knock them into the bobtach. Grease will be pushed out of where the grease nipples used to be. Do this on both sides and the bobtach should just fall down, be sure to put a piece of timber under it as they are quite heavy. Just let it drop a few inches you don't want to damage your tilt cylinder. While its off, you can replace the bushing in the bobtach and install new pins. You may need to run a small bead of weld on the bobtach bushing to get it out but deal with that if you need to. To re-install the pins, insert them into the bobtach first then pift into position (2 people make this ALOT easier) then using a long punch or metal rod knock the pins in place through the grease nipple hole. If you pump it up with grease, this will also help as the hydraulic effect will push the pin outwards and into the lift arm. Tighten the bolts up nice and snug and it should be all good! If anything is un-clear just let me know. I'm assuming they haven't changed the basic design of later machines to my 743 but its essentially the same. The grease nipple may be in a different location. Any problems just yell. Good luck! [/QUOTE]
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1997 753 Bobcat Bob-tach Problem
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