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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
743 , leaking chain oil
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<blockquote data-quote="Tazza" data-source="post: 11624" data-attributes="member: 82"><p>Ok, so axle seals.</p><p>I take it you have just a 743 and not the 743B. Is there a bolt on the end of the axle where the tyres are bolted to? or is just welded on?</p><p>If its bolted you are in luck, remove the bolt, install a hydraulic bottle jack between the frame and axle hub with the pump section on the under side. Pump it up to get the axle housing off, screw a self tapping screw into the seal and pull it out, replace the seal and axle housing and you are set.</p><p>Now, if you don't have 2 piece axles the job just got MUCH harder. If this is the case i hope the problem is a front tyre, they are easier to gain access to. you will need to remove the plate that the steering levers come through, then the front inspection plate if you are doing the front and the rear one that holds the park brake if you are doing the rear. Now it gets hard!</p><p>Drain the oil, insert a 1 1/8" spanner inside the chain case to the end of the axle there is a bolt, this must be un-done. They are SUPER tight and held in with loctite. You have 2 options to un-do these, you can start the machine and get it to spin that side to un-do the bolt or you can remove the 2 large hoses from the hydro motor on that side and turn the axle with a bar. Install a jack between the frame and axle hub like mentioned earlier this will pull the seal and bearing out. Slide the axle out pull the bearing off, install a new wear ring and seal, re-install the bearing and grease it up, slide it back in, this is a 2 person job! slide the bearing on the end of the axle then lift and position the sprocket and get them to engage. You need an axle seal tool here but an old bearing cup cut in half will also work, slide it around the axle and hold with a hose clamp, belt the end of the axle till it seats correctly, remove the bearing cup and clamp. Install the bolt with loctite and tighten it really tight. Re-fill with oil and re-attach everything and you should be set.</p><p>I may have missed a few things there but its essentially all there. Now do note the sprockets are heavy and some teeth may be sharp and WILL cut you. The chain is also heavy, its not a fun job. If you can, use a chain breaker and the job will be much easier.</p><p>Good luck with it! its not easy but it can be done.</p></blockquote><p></p>
[QUOTE="Tazza, post: 11624, member: 82"] Ok, so axle seals. I take it you have just a 743 and not the 743B. Is there a bolt on the end of the axle where the tyres are bolted to? or is just welded on? If its bolted you are in luck, remove the bolt, install a hydraulic bottle jack between the frame and axle hub with the pump section on the under side. Pump it up to get the axle housing off, screw a self tapping screw into the seal and pull it out, replace the seal and axle housing and you are set. Now, if you don't have 2 piece axles the job just got MUCH harder. If this is the case i hope the problem is a front tyre, they are easier to gain access to. you will need to remove the plate that the steering levers come through, then the front inspection plate if you are doing the front and the rear one that holds the park brake if you are doing the rear. Now it gets hard! Drain the oil, insert a 1 1/8” spanner inside the chain case to the end of the axle there is a bolt, this must be un-done. They are SUPER tight and held in with loctite. You have 2 options to un-do these, you can start the machine and get it to spin that side to un-do the bolt or you can remove the 2 large hoses from the hydro motor on that side and turn the axle with a bar. Install a jack between the frame and axle hub like mentioned earlier this will pull the seal and bearing out. Slide the axle out pull the bearing off, install a new wear ring and seal, re-install the bearing and grease it up, slide it back in, this is a 2 person job! slide the bearing on the end of the axle then lift and position the sprocket and get them to engage. You need an axle seal tool here but an old bearing cup cut in half will also work, slide it around the axle and hold with a hose clamp, belt the end of the axle till it seats correctly, remove the bearing cup and clamp. Install the bolt with loctite and tighten it really tight. Re-fill with oil and re-attach everything and you should be set. I may have missed a few things there but its essentially all there. Now do note the sprockets are heavy and some teeth may be sharp and WILL cut you. The chain is also heavy, its not a fun job. If you can, use a chain breaker and the job will be much easier. Good luck with it! its not easy but it can be done. [/QUOTE]
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743 , leaking chain oil
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