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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
743 missing tilt cylinder and other problems
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<blockquote data-quote="Tazza" data-source="post: 25554" data-attributes="member: 82"><p>Ah, now i get you!</p><p>The steering is an adjustment, as is the park brake.</p><p>Now the bobtach wear.... This can be a total pig. I'm currently working on a worn bobtach on a 763 and a 753G, both have worn the pivot point in the bobtach out badly, they wore through the bushing and into the boss that the bushing used to sit in. Now the 743 is no where near as easy, but you should be able to use the old boss out and weld a new one in, i'm doing that now, still machining new bosses. This is only half your problem though. As you said your tapered pins have been loose and have wobbled around causing wear so new pins will not seat correctly.</p><p>This really depends on what gear you have available. The 743 i use now, the previous owner in his *wisdom* got the pins and bobtach bored out and installed 1 1/4" bolts!!!! they wore out badly at the bottom of the lift arms. I machined new pins and new bosses for the lower pins on the arms. These were tapers set at i think 7 degrees. Both the pins and bosses were machined at the same time so the angles were the same. Again this depends if you have access to a lathe. Now, to line them up i got a length of rod and worked out the lengths, machines 2 tapers and installed the bosses on the ends, put them in the arms so the pins were in a perfect straight line with each other. I then welded them into the arms with low hydrogen rods to get an excellent weld job. Then cut the rod in 2 places to get it out. Machining the bosses on the bobtach wasn't so easy, i line bored it but it did the job. Made new bushings and it worked great. If you can get the old ones out with a torch or plasma, install the new pins to line the bosses up before welding and you should be set.</p><p>Long winded i know, but its a few ideas. No matter how bad the damage is, it CAN be fixed with some time and effort.</p></blockquote><p></p>
[QUOTE="Tazza, post: 25554, member: 82"] Ah, now i get you! The steering is an adjustment, as is the park brake. Now the bobtach wear.... This can be a total pig. I'm currently working on a worn bobtach on a 763 and a 753G, both have worn the pivot point in the bobtach out badly, they wore through the bushing and into the boss that the bushing used to sit in. Now the 743 is no where near as easy, but you should be able to use the old boss out and weld a new one in, i'm doing that now, still machining new bosses. This is only half your problem though. As you said your tapered pins have been loose and have wobbled around causing wear so new pins will not seat correctly. This really depends on what gear you have available. The 743 i use now, the previous owner in his *wisdom* got the pins and bobtach bored out and installed 1 1/4” bolts!!!! they wore out badly at the bottom of the lift arms. I machined new pins and new bosses for the lower pins on the arms. These were tapers set at i think 7 degrees. Both the pins and bosses were machined at the same time so the angles were the same. Again this depends if you have access to a lathe. Now, to line them up i got a length of rod and worked out the lengths, machines 2 tapers and installed the bosses on the ends, put them in the arms so the pins were in a perfect straight line with each other. I then welded them into the arms with low hydrogen rods to get an excellent weld job. Then cut the rod in 2 places to get it out. Machining the bosses on the bobtach wasn't so easy, i line bored it but it did the job. Made new bushings and it worked great. If you can get the old ones out with a torch or plasma, install the new pins to line the bosses up before welding and you should be set. Long winded i know, but its a few ideas. No matter how bad the damage is, it CAN be fixed with some time and effort. [/QUOTE]
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General Bobcat Skidsteer Forum
743 missing tilt cylinder and other problems
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